Top 100 US Patents in Transmission Systems
section h - electricity > electric communication technique > transmission
Sorted by IPQ® Score, an objective measure of patent quality. View scores and methodology at PatentRatings.com. You can also view all by publication date instead.
US5953368 (A), filed
Tue May 20 00:00:00 CDT 1997
, published
Tue Sep 14 00:00:00 CDT 1999
- AXONN CORP
A remote power meter monitoring system using spread spectrum transmitters, fast frequency shift keying, spread spectrum receivers and a computer. The spread spectrum transmitter uses a chip code generator, preamble register, address register data register and...
US5768269 (A), filed
Fri Aug 25 00:00:00 CDT 1995
, published
Tue Jun 16 00:00:00 CDT 1998
- TERAYON CORP
A method and apparatus for carrying out synchronous codivision multiple access (SCDMA) communication of multiple channels of digital data over a shared transmission media such as a cable television system coaxial cable, a fiber optic or copper conductor...
US5029183 (A), filed
Thu Jun 29 00:00:00 CDT 1989
, published
Tue Jul 02 00:00:00 CDT 1991
- SYMBOL TECHNOLOGIES INC
US5235633 (A), filed
Thu Dec 26 00:00:00 CST 1991
, published
Tue Aug 10 00:00:00 CDT 1993
- JONES SCOTT L
A cellular telephone system includes a plurality of cell sites and a mobile telephone switching office. Call management, including selection of a cell site most appropriate for a call associated with a mobile unit, are made based on the geographic location of...
US6389002 (B1), filed
Tue Sep 21 00:00:00 CDT 1999
, published
Tue May 14 00:00:00 CDT 2002
- INTERDIGITAL TECH CORP
A spread-spectrum CDMA communications system for communicating data between a plurality of users to a plurality of spread-spectrum units. The spread-spectrum communications system is located within a same geographical region as occupied by an existing FDMA,...
US7215984 (B2), filed
Tue May 04 00:00:00 CDT 2004
, published
Tue May 08 00:00:00 CDT 2007
- MASIMO CORP
The present invention involves method and apparatus for analyzing measured signals that are modeled as containing primary and secondary portions. Coefficients relate the two signals according to a model defined in accordance with the present invention. In one...
US6493563 (B1), filed
Wed Nov 22 00:00:00 CST 2000
, published
Tue Dec 10 00:00:00 CST 2002
- INTERDIGITAL TECH CORP
A system and method of controlling transmission power during the establishment of a channel in a CDMA communication system utilize the transmission of a short code from a subscriber unit to a base station during initial power ramp-up. The short code is a...
US6244512 (B1), filed
Tue Aug 25 00:00:00 CDT 1998
, published
Tue Jun 12 00:00:00 CDT 2001
- INTERMEC IP CORP
A hand-held data collection device with a user interface surface that is wider than its handgrip area. Also, a hand-held data collection device with an upwardly facing surface containing a user interface and a side surface containing a plurality of actuators....
US5619503 (A), filed
Tue Jan 11 00:00:00 CST 1994
, published
Tue Apr 08 00:00:00 CDT 1997
- ERICSSON GE MOBILE INC
The invention relates to a radio communication system and method for minimizing co-channel interference. The system and method employ a matrix processor to separate signals received from, or transmitted to, a plurality of mobile units. The coefficients of the...
US6621854 (B1), filed
Fri Jan 15 00:00:00 CST 1993
, published
Tue Sep 16 00:00:00 CDT 2003
- LOCKHEED CORP
An assembly of simultaneously transmitted electrically generated signals is disclosed, which contains a subset of binary spreading-code sequences that are members of a larger set of binary spreading-code sequences available to a particular node of a multi-node...
US5142550 (A), filed
Fri Dec 28 00:00:00 CST 1990
, published
Tue Aug 25 00:00:00 CDT 1992
- SYMBOL TECHNOLOGIES INC
A packet data transmission system is used to link a number of remote hand-held data-gathering units such as bar code readers to a central computer which maintains a database management system. Data packets are sent from the remote units by an RF link to...
US5799010 (A), filed
Thu Jun 27 00:00:00 CDT 1996
, published
Tue Aug 25 00:00:00 CDT 1998
- INTERDIGITAL TECH CORP
A multiple access, spread-spectrum communication system processes a plurality of information signals received by a Radio Carrier Station (RCS) over telecommunication lines for simultaneous transmission over a radio frequency (RF) channel as a code-division-mul...
US7308110 (B2), filed
Wed Feb 26 00:00:00 CST 2003
, published
Tue Dec 11 00:00:00 CST 2007
- DIGIMARC CORP
An image is marked by making slight changes to pixel values. These changes are essentially imperceptible on human scrutiny, but detectable by computer analysis. Such markings have applications in identifying ownership of images (including video), and also in...
US4304001 (A), filed
Thu Jan 24 00:00:00 CST 1980
, published
Tue Dec 01 00:00:00 CST 1981
- FORNEY INTERNATIONAL
A control system for controlling an industrial process includes a plurality of remotely located process control units (remotes) each coupled to an associated input/output device(s) and adapted to communicate with one another through a dual channel communicatio...
US6206830 (B1), filed
Wed Nov 17 00:00:00 CST 1999
, published
Tue Mar 27 00:00:00 CST 2001
- MASIMO CORP
A signal processor which acquires a first signal, including a first desired signal portion and a first undesired signal portion, and a second signal, including a second desired signal portion and a second undesired signal portion, wherein the first and second...
US5648982 (A), filed
Fri Sep 09 00:00:00 CDT 1994
, published
Tue Jul 15 00:00:00 CDT 1997
- OMNIPOINT CORP
A technique for modulating and demodulating CPM spread spectrum signals and variations of CPM spread spectrum signals. A transmitter divides a signal data stream into a plurality of data streams (such as I and Q data streams), independently modulates the I and...
US6700990 (B1), filed
Wed Sep 29 00:00:00 CDT 1999
, published
Tue Mar 02 00:00:00 CST 2004
- DIGIMARC CORP
To decode a digital watermark from an image notwithstanding geometrical corruption of the image (e.g., scale, rotation, etc.), a Fourier-Mellin transform is advantageously used. In a particular method, an image is transformed to the spatial frequency domain....
US5377183 (A), filed
Mon Apr 11 00:00:00 CDT 1994
, published
Tue Dec 27 00:00:00 CST 1994
- ERICSSON GE MOBILE COMMUNICAT
A Code Division Multiple Access (CDMA) communication system which contains a calling channel which is used to inform silent mobiles that they are being called. In the system, the calling channel is chosen to be the strongest overlapping signal so that it...
US6351499 (B1), filed
Wed Dec 15 00:00:00 CST 1999
, published
Tue Feb 26 00:00:00 CST 2002
- IOSPAN WIRELESS INC
A method of maximizing a communication parameter, such as data capacity, signal quality or throughput of a channel between a transmit unit with M transmit antennas and a receive unit with N receive antennas and a communication system such as a wireless network...
US5933421 (A), filed
Thu Feb 06 00:00:00 CST 1997
, published
Tue Aug 03 00:00:00 CDT 1999
- AT T WIRELESS SERVICES INC
The high quality PCS communications are enabled in environments where adjacent PCS service bands operate with out-of-band harmonics that would otherwise interfere with the system's operation. The highly bandwidth-efficient communications method combines a form...
US5479441 (A), filed
Tue Jan 18 00:00:00 CST 1994
, published
Tue Dec 26 00:00:00 CST 1995
- SYMBOL TECHNOLOGIES INC
A packet data transmission system is used to link a number of remote hand-held data-gathering units such as bar code readers to a central computer which maintains a database management system. Data packets are sent from the remote units by an RF link to...
US5510800 (A), filed
Tue Sep 06 00:00:00 CDT 1994
, published
Tue Apr 23 00:00:00 CDT 1996
- UNIV CALIFORNIA
A bi-static radar configuration measures the direct time-of-flight of a transmitted RF pulse and is capable of measuring this time-of-flight with a jitter on the order of about one pico-second, or about 0.01 inch of free space distance for an electromagnetic...
US7460507 (B2), filed
Fri Feb 20 00:00:00 CST 2004
, published
Tue Dec 02 00:00:00 CST 2008
- BROADCOM CORP
A packet-based, hierarchical communication system, arranged in a spanning tree configuration, is described in which wired and wireless communication networks exhibiting substantially different characteristics are employed in an overall scheme to link portable...
US7043052 (B2), filed
Tue Jun 04 00:00:00 CDT 2002
, published
Tue May 09 00:00:00 CDT 2006
- DIGIMARC CORP
Security of photographic identification documents is enhanced by embedding within the photographic image encoded information that may be correlated to other information pertaining to the individual represented by the image, such other information being, for...
US6985600 (B2), filed
Thu Mar 15 00:00:00 CST 2001
, published
Tue Jan 10 00:00:00 CST 2006
- DIGIMARC CORP
Stationery, or other printable media, is encoded with a digital watermark. The watermark is not conspicuous to a human observer of the media, yet conveys plural bits of auxiliary information when optically scanned and digitally processed. The watermark can be...
US7471659 (B2), filed
Fri May 09 00:00:00 CDT 2003
, published
Tue Dec 30 00:00:00 CST 2008
- QUALCOMM INC
A system and method for determining 1xEV-DO availability for a packet data call in a wireless device is presented. When the wireless device receives a request to initiate a packet data call, the device determines if it currently has access to a preferred...
US6219694 (B1), filed
Fri May 29 00:00:00 CDT 1998
, published
Tue Apr 17 00:00:00 CDT 2001
- RES IN MOTION LTD
A system and method for pushing information from a host system to a mobile data communication device upon sensing a triggering event is disclosed. A redirector program operating at the host system enables a user to continuously redirect certain user-selected...
US6567533 (B1), filed
Thu Apr 27 00:00:00 CDT 2000
, published
Tue May 20 00:00:00 CDT 2003
- DIGIMARC CORP
To permit scaling or rotation of an image to be discerned-even if the original image is not available-certain marker signals are steganographically encoded in the image. In one particular implementation, encoding is effected by adding an overlay signal to the...
US7099292 (B2), filed
Fri Feb 08 00:00:00 CST 2002
, published
Tue Aug 29 00:00:00 CDT 2006
- INTERDIGITAL TECH CORP
A spread spectrum remote unit produces a message signal having message data. A reference signal is produced. The reference signal is used to recover the message data from a combined spread spectrum signal. The reference signal and the message signal is...
US6606051 (B1), filed
Mon Oct 18 00:00:00 CDT 1999
, published
Tue Aug 12 00:00:00 CDT 2003
- TIME DOMAIN CORP
A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, for example, a reverse bicone antenna or a pulse-responsive...
US5841768 (A), filed
Thu Jun 27 00:00:00 CDT 1996
, published
Tue Nov 24 00:00:00 CST 1998
- INTERDIGITAL TECH CORP
A system and method of controlling transmission power during the establishment of a channel in a CDMA communication system utilize the transmission of a short code from a subscriber unit to a base station during initial power ramp-up. The short code is a...
US6169759 (B1), filed
Mon Mar 22 00:00:00 CST 1999
, published
Tue Jan 02 00:00:00 CST 2001
- GOLDEN BRIDGE TECHNOLOGY
An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spec...
US5075697 (A), filed
Tue Sep 18 00:00:00 CDT 1990
, published
Tue Dec 24 00:00:00 CST 1991
- NIPPON ELECTRIC CO
US7003132 (B2), filed
Tue Apr 01 00:00:00 CST 2003
, published
Tue Feb 21 00:00:00 CST 2006
- DIGIMARC CORP
Methods for embedding and reading auxiliary messages from image signals use embedded code signals modulated with the auxiliary message. These embedded ode signals may be used to convey hidden tracking codes in images, video and printed objects. The embedded...
US6496135 (B1), filed
Fri Jun 01 00:00:00 CDT 2001
, published
Tue Dec 17 00:00:00 CST 2002
- UNIVERSAL ELECTRONICS INC
A universal remote control comprising a keyboard having a plurality of pushbuttons including a macro pushbutton and a library of codes and data for use in transmitting operating commands to a plurality of different home appliances of different manufacturers....
US7437131 (B2), filed
Mon Nov 07 00:00:00 CST 2005
, published
Tue Oct 14 00:00:00 CDT 2008
- RICHWAVE TECHNOLOGY CORP
An active mixer with self-adaptive bias feedback is described and resolves a poor linearity, inconvenient design of a bias circuit, and other defects of a conventional mixer. The dual self-feedback bias structure according to this invention is used. The active...
US5553062 (A), filed
Tue Jul 26 00:00:00 CDT 1994
, published
Tue Sep 03 00:00:00 CDT 1996
- INTERDIGITAL COMMUNICATION COR
A spread-spectrum code division multiple access interference canceler system and method for reducing interference in a spread-spectrum CDMA receiver having N chip-code channels, with each of the N channels identified by a distinct chip-code signal. The...
US4977577 (A), filed
Wed Nov 02 00:00:00 CST 1988
, published
Tue Dec 11 00:00:00 CST 1990
- AXONN CORP
A wireless alarm system using spread spectrum transmitters, fast frequency shift keying, spread spectrum receivers and computer with a display. The spread spectrum transmitter includes an oscillator coupled to a microprocessor with chip code generation means,...
US6252909 (B1), filed
Tue Feb 25 00:00:00 CST 1997
, published
Tue Jun 26 00:00:00 CDT 2001
- AWARE INC
A communication system for sending a sequence of symbols on a communication link. The system includes a transmitter for placing information indicative of the sequence of symbols on the communication link and a receiver for receiving the information placed on...
US6463410 (B1), filed
Mon Sep 13 00:00:00 CDT 1999
, published
Tue Oct 08 00:00:00 CDT 2002
- VICTOR COMPANY OF JAPAN
In an audio signal encoding apparatus, a first audio signal and a second audio signal are added into an addition-result signal. The first audio signal is subtracted from the second audio signal to generate a subtraction-result signal. A first difference signal...
US5663734 (A), filed
Fri Mar 08 00:00:00 CST 1996
, published
Tue Sep 02 00:00:00 CDT 1997
- PRECISION TRACKING INC
A GPS receiver in one embodiment includes an antenna which receives GPS signals at an RF frequency from in view satellites; a downconverter coupled to the antenna for reducing the RF frequency of the received GPS signals to an intermediate frequency (IF); a...
US5841978 (A), filed
Thu Jul 27 00:00:00 CDT 1995
, published
Tue Nov 24 00:00:00 CST 1998
- DIGIMARC CORP
A given data object can effectively contain both a graphical representation to a network user and embedded information, such as the URL address of another network node, thereby to permit the object itself to serve as an automated hot link. The underlying...
US7130087 (B2), filed
Tue Jun 15 00:00:00 CDT 2004
, published
Tue Oct 31 00:00:00 CST 2006
- DIGIMARC CORP
Security documents (e.g. passports, currency, event tickets, and the like) are encoded to convey machine-readable multi-bit binary information (e.g., a digital watermark), usually in a manner not alerting human viewers that such information is present. The...
US5482036 (A), filed
Thu May 26 00:00:00 CDT 1994
, published
Tue Jan 09 00:00:00 CST 1996
- MASIMO CORP
A signal processor which acquires a first signal, including a first desired signal portion and a first undesired signal portion, and a second signal, including a second desired signal portion and a second undesired signal portion, wherein the first and second...
US5008900 (A), filed
Mon Aug 14 00:00:00 CDT 1989
, published
Tue Apr 16 00:00:00 CDT 1991
- INT MOBILE MACHINES
A subscriber unit for wireless communication with a base station in a wireless subscriber communication system includes a FIR chip, a DIF (digital intermediate frequency) chip, a single processor chip and a radio. The processor chip transcodes a digital voice...
US6020881 (A), filed
Tue Feb 18 00:00:00 CST 1997
, published
Tue Feb 01 00:00:00 CST 2000
- SUN MICROSYSTEMS
An intuitive graphical user interface is based upon a geographic map structure, and includes a system for controlling remote external electronic devices. In the defined graphical user interface, each Space of the geographic map structure is rendered on a touch...
US6618429 (B2), filed
Wed Oct 02 00:00:00 CDT 2002
, published
Tue Sep 09 00:00:00 CDT 2003
- OUALCOMM INC
A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better...
US5548226 (A), filed
Thu Jun 30 00:00:00 CDT 1994
, published
Tue Aug 20 00:00:00 CDT 1996
- HITACHI LTD
A signal transmitting circuit includes one or more circuit blocks having a driving circuit and an intra-block transmission line for transmitting a signal produced by the driving circuit, one or more circuit blocks having a receiving circuit and an intra-block...
US7440416 (B2), filed
Mon Dec 15 00:00:00 CST 2003
, published
Tue Oct 21 00:00:00 CDT 2008
- BROADCOM CORP
A hierarchical communication system, arranged in a spanning tree configuration, is described in which wired and wireless communication networks exhibiting substantially different characteristics are employed in an overall scheme to link portable or mobile...
US7242675 (B2), filed
Wed Jul 24 00:00:00 CDT 2002
, published
Tue Jul 10 00:00:00 CDT 2007
- INTERDIGITAL TECH CORP
A spread-spectrum code division multiple access interference canceller employed by a remote terminal for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceller includes a plurality of correlators or...
US7286684 (B2), filed
Wed Jun 11 00:00:00 CDT 2003
, published
Tue Oct 23 00:00:00 CDT 2007
- DIGIMARC CORP
A two dimensional pattern design for secure documents serves as both a machine readable code and an aesthetic part of the documents' design. A method for generating the design generates a variable auxiliary message comprising message values and maps the...
US5500756 (A), filed
Fri Feb 26 00:00:00 CST 1993
, published
Tue Mar 19 00:00:00 CST 1996
- HITACHI LTD
An optical repeater for realizing transmission of supervisory information of an optical fiber transmission system without the output power of an optical fiber amplifier being reduced, wherein a supervisory optical transmitter and optical receiver with a...
US5363403 (A), filed
Thu Apr 22 00:00:00 CDT 1993
, published
Tue Nov 08 00:00:00 CST 1994
- INTERDIGITAL TECH CORP
A spread-spectrum code division multiple access interference canceler for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceler includes a plurality of correlators or matched filters, a plurality of...
US6868076 (B2), filed
Wed May 09 00:00:00 CDT 2001
, published
Tue Mar 15 00:00:00 CST 2005
- INTERDIGITAL TECH CORP
A plurality of channels are received as a received signal. Each channel is associated with a code. For each of the plurality of channels, others of the plurality of channels are subtracted from the received signal and a result of that subtracting is despread...
US5878339 (A), filed
Fri Feb 06 00:00:00 CST 1998
, published
Tue Mar 02 00:00:00 CST 1999
- GTE MOBILE COMM SERVINC
A cellular radiotelephone system (10) includes mobile stations (28) which may be remotely programmed from a customer activation system (12) to effect activation and other programming needs. Mobile stations (28) are manufactured in a blank form that causes them...
USRE40281 (E1), filed
Tue Nov 23 00:00:00 CST 2004
, published
Tue Apr 29 00:00:00 CDT 2008
- AWARE INC
?delete-start id="DEL-S-00001" date="20080429" ?A communication system for sending a sequence of symbols on a communication link. The system includes a transmitter for placing information indicative of the sequence of symbols on the communication link and a...
US6546488 (B2), filed
Mon Sep 21 00:00:00 CDT 1998
, published
Tue Apr 08 00:00:00 CDT 2003
- HUGHES ELECTRONICS CORP
A method and apparatus for broadcasting newsgroup information to a plurality of users uses a news server, which is in communication with the Internet, a newscast transmitter, a satellite gateway, and a subscriber station. The news server gathers newsgroup...
US5056109 (A), filed
Tue Nov 07 00:00:00 CST 1989
, published
Tue Oct 08 00:00:00 CDT 1991
- QUALCOMM INC
A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell site using code division multiple access spread spectrum communication signals. The power control...
US4675863 (A), filed
Wed Mar 20 00:00:00 CST 1985
, published
Tue Jun 23 00:00:00 CDT 1987
- INT MOBILE MACHINES
A system for the wireless transmission of multiple information signals utilizing digital time division circuits between a base station and a plurality of subscriber stations. The subscriber stations may be fixed or movable. The number of time division circuits...
US5850481 (A), filed
Mon May 08 00:00:00 CDT 1995
, published
Tue Dec 15 00:00:00 CST 1998
- DIGIMARC CORP
An identification code signal is impressed on a carrier to be identified (such as an electronic data signal or a physical medium) in a manner that permits the identification signal later to be discerned and the carrier thereby identified. The method and...
US5850481 (C1), filed
Mon May 08 00:00:00 CDT 1995
, published
Tue Jul 16 00:00:00 CDT 2002
- DIGIMARC CORP
US5717510 (A), filed
Wed Aug 02 00:00:00 CDT 1995
, published
Tue Feb 10 00:00:00 CST 1998
- FUJITSU LTD
The invention provides a technique for optimizing transmission conditions to achieve large-capacity transmission, and also provides peripheral techniques for the practical implementation of optical multiplexing that makes large-capacity transmission possible....
US7215986 (B2), filed
Wed Jun 15 00:00:00 CDT 2005
, published
Tue May 08 00:00:00 CDT 2007
- MASIMO CORP
The present invention involves a method and an apparatus for analyzing measured signals, including the determination of a measurement of correlation in the measured signals during a calculation of a physiological parameter of a monitored patient. Use of this...
US5812951 (A), filed
Wed Nov 23 00:00:00 CST 1994
, published
Tue Sep 22 00:00:00 CDT 1998
- HUGHES ELECTRONICS CORP
The present invention relates to a wireless personal communications system (WPCS) having several features embodied in several forms. In one embodiment, the, WPCS includes at least one RP, a first SU in communication with the RP, and a second SU in communicatio...
US5103459 (A), filed
Mon Jun 25 00:00:00 CDT 1990
, published
Tue Apr 07 00:00:00 CDT 1992
- QUALCOMM INC
A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better...
US5103459 (B1), filed
Mon Jun 25 00:00:00 CDT 1990
, published
Tue Jul 06 00:00:00 CDT 1999
- QUALCOMM INC
US5121407 (A), filed
Thu Sep 27 00:00:00 CDT 1990
, published
Tue Jun 09 00:00:00 CDT 1992
- PITTWAY CORP
US4398286 (A), filed
Mon Jul 07 00:00:00 CDT 1980
, published
Tue Aug 09 00:00:00 CDT 1983
- ELECTRONIQUE MARCEL DASSAULT
In a satellite which asynchronously receives radio frequency signals from a plurality of beacons scattered at the surface of the earth, each signal received has a pure carrier wave portion followed by a phase modulated message carrying portion. The frequencies...
US5956674 (A), filed
Thu May 02 00:00:00 CDT 1996
, published
Tue Sep 21 00:00:00 CDT 1999
- DIGITAL THEATER SYSTEMS INC
A subband audio coder employs perfect/non-perfect reconstruction filters, predictive/non-predictive subband encoding, transient analysis, and psycho-acoustic/minimum mean-square-error (mmse) bit allocation over time, frequency and the multiple audio channels...
US5739327 (A), filed
Wed Jun 07 00:00:00 CDT 1995
, published
Tue Apr 14 00:00:00 CDT 1998
- CLOROX CO
Bleaching compositions are provided that comprise a nitrile containing compound that has the nitrile bonded to a quaternary nitrogen through a methylene unit (where one or both of the normal hydrogens can be substituted), and two of the quaternary nitrogen...
US6882738 (B2), filed
Fri Oct 24 00:00:00 CDT 2003
, published
Tue Apr 19 00:00:00 CDT 2005
- DIGIMARC CORP
A tangible object (such as a microprocessor, wristwatch, pharmaceutical, compact disc, vehicle part, etc) is surface-textured to encode a plural-bit code thereon. In one arrangement, this encoding conveys date information. In use, the object can be imaged by a...
US5239540 (A), filed
Tue Nov 27 00:00:00 CST 1990
, published
Tue Aug 24 00:00:00 CDT 1993
- SCIENTIFIC ATLANTA
An apparatus and method is described for transmitting, receiving and communicating program data signals which are combined with digital data signals. Preferably, the present invention compresses 30 digital audio signals, multiplexes them with title, track,...
US6144711 (A), filed
Wed Aug 27 00:00:00 CDT 1997
, published
Tue Nov 07 00:00:00 CST 2000
- CISCO SYSTEMS INC
A space-time signal processing system with advantageously reduced complexity. The system may take advantage of multiple transmitter antenna elements and/or multiple receiver antenna elements, or multiple polarizations of a single transmitter antenna element...
US5603081 (A), filed
Mon Nov 01 00:00:00 CST 1993
, published
Tue Feb 11 00:00:00 CST 1997
- ERICSSON TELEFON AB L M
A communications system in which information is transmitted in a plurality of time slots grouped into a plurality of superframes which are, in turn, grouped into a plurality of paging frames. A remote station receives paging messages once in each paging frame.
US6046992 (A), filed
Fri Apr 24 00:00:00 CDT 1998
, published
Tue Apr 04 00:00:00 CDT 2000
- INTERMEC IP CORP
An apparatus and a method for routing data in a radio data communication system having one or more host computers, one or more intermediate base stations, and one or more RF terminals organizes the intermediate base stations into an optimal spanning-tree...
US6895450 (B2), filed
Tue Apr 16 00:00:00 CDT 2002
, published
Tue May 17 00:00:00 CDT 2005
- BROADCOM CORP
An apparatus and a method for routing data in a radio data communication system having one or more host computers, one or more intermediate base stations, and one or more RF terminals organizes the intermediate base stations into an optimal spanning-tree...
US6160551 (A), filed
Mon Mar 20 00:00:00 CST 1995
, published
Tue Dec 12 00:00:00 CST 2000
- SUN MICROSYSTEMS INC
An intuitive graphical user interface is based upon a geographic map structure, and includes a system for controlling remote external electronic devices. In the defined graphical user interface, each space of the geographic map structure is rendered on a touch...
US5504773 (A), filed
Tue Dec 21 00:00:00 CST 1993
, published
Tue Apr 02 00:00:00 CST 1996
- QUALCOMM INC
In a digital communication system in which digital data is transmitted in data frames of a preselected time duration, a method and apparatus for formatting digital data in each data frame. A set of data bits of a first data type having a bit count correspondin...
US5345471 (A), filed
Mon Apr 12 00:00:00 CDT 1993
, published
Tue Sep 06 00:00:00 CDT 1994
- UNIV CALIFORNIA
An ultra-wideband (UWB) receiver utilizes a strobed input line with a sampler connected to an amplifier. In a differential configuration, +/-UWB inputs are connected to separate antennas or to two halves of a dipole antenna. The two input lines include...
US5479562 (A), filed
Fri Jun 18 00:00:00 CDT 1993
, published
Tue Dec 26 00:00:00 CST 1995
- DOLBY LAB LICENSING CORP
The invention relates to formatting encoded audio information in a form suitable for transmission or storage. Audio information is encoded into a binary form, using an invariant number of bits to represent at least some but not all of the encoded information....
US7309990 (B2), filed
Fri Nov 17 00:00:00 CST 2006
, published
Tue Dec 18 00:00:00 CST 2007
- MERLIN TECHNOLOGY INC
An above ground locator includes an apparatus for determining the strength of the locating signal at a selected point relative to the boring tool. The apparatus includes an antenna arrangement configured for measuring the strength of the locating signal at the...
US7337233 (B2), filed
Wed Dec 31 00:00:00 CST 2003
, published
Tue Feb 26 00:00:00 CST 2008
- HUGHES NETWORK SYSTEMS
A system in which a personal computer sends messages into a TCP/IP network using a conventional dial-up link and downloads data from the TCP/IP network using a high-speed one-way satellite link. A preferred embodiment uses a conventional SLIP provider to...
US4979183 (A), filed
Thu Mar 23 00:00:00 CST 1989
, published
Tue Dec 18 00:00:00 CST 1990
- ECHELON SYSTEMS
A transceiver for transmitting and receiving digital data is disclosed. The transceiver employs direct sequence spread spectrum communications techniques for reducing interference among multiple users in a communications network environment. Each transceiver...
US5146471 (A), filed
Thu Apr 11 00:00:00 CDT 1991
, published
Tue Sep 08 00:00:00 CDT 1992
- ECHELON SYSTEMS
An improved correlator for use in a spread spectrum communications system which operates with a predetermined chip sequence includes an N-stage correlation register, wherein each stage corresponds to a signal chip in the sequence, an a means for autocorrelatin...
US5719852 (A), filed
Wed May 29 00:00:00 CDT 1996
, published
Tue Feb 17 00:00:00 CST 1998
- INTERDIGITAL TECH CORP
A spread-spectrum code division multiple access interference canceler for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceler includes a plurality of correlators or matched filters, a plurality of...
US5742905 (A), filed
Mon Sep 19 00:00:00 CDT 1994
, published
Tue Apr 21 00:00:00 CDT 1998
- BELL COMMUNICATIONS RES
A person communications internetworking provides a network subscriber with the ability to remotely control the receipt and delivery of wireless and wireline voice and text messages. The network operates as an interfaces between various wireless and wireline...
US6590998 (B2), filed
Wed Aug 01 00:00:00 CDT 2001
, published
Tue Jul 08 00:00:00 CDT 2003
- DIGIMARC CORP
A given data object can effectively contain both a graphical representation to a network user and embedded information, such as the URL address of another network node, thereby to permit the object itself to serve as an automated hot link. The underlying...
METHOD AND SYSTEM FOR PROVIDING A SOFT HANDOFF IN COMMUNICATIONS IN A CDMA CELLULAR TELEPHONE SYSTEM
US5101501 (A), filed
Tue Nov 07 00:00:00 CST 1989
, published
Tue Mar 31 00:00:00 CST 1992
- QUALCOMM INC
In a cellular telephone system a system for directing communications between a mobile user and cell-sites as a mobile user changes cell-site service areas. The mobile user includes an apparatus for, while in communication with another system user via one...
US5228056 (A), filed
Fri Dec 14 00:00:00 CST 1990
, published
Tue Jul 13 00:00:00 CDT 1993
- INTERDIGITAL TECH CORP
A spread spectrum communications system for use over a communications channel, including a transmitter-generic-chip-code generator, a transmitter-message-chip-code generator, an EXCLUSIVE-OR gate, a combiner, a transmitter, a receiver-generic-chip-code...
US5914481 (A), filed
Tue Oct 07 00:00:00 CDT 1997
, published
Tue Jun 22 00:00:00 CDT 1999
- NORAND CORP
A pocket-sized hand-held data processing device with a coupling system, a user interface and an optical indicia reader. The device can include a display to display alphanumeric information. The display can have a touch screen input area and a handwritten input...
US7389100 (B2), filed
Mon Mar 24 00:00:00 CST 2003
, published
Tue Jun 17 00:00:00 CDT 2008
- PARKERVISION INC
Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal are described herein. Briefly stated, such methods, systems, and apparatuses operate by receiving an EM signal and an aliasing signal having an...
US6650624 (B1), filed
Fri May 19 00:00:00 CDT 2000
, published
Tue Nov 18 00:00:00 CST 2003
- BROADCOM CORP
A number of features for enhancing the performance of a cable transmission system in which data is transmitted between a cable modem termination system at a headend and a plurality of cable modems located different distances from the headend. The power...
US6452981 (B1), filed
Fri Nov 05 00:00:00 CST 1999
, published
Tue Sep 17 00:00:00 CDT 2002
- CISCO SYSTEMS INC
A space-time signal processing system with advantageously reduced complexity. The system may take advantage of multiple transmitter antenna elements and/or multiple receiver antenna elements, or multiple polarizations of a single transmitter antenna element...
US6501975 (B2), filed
Tue Jan 09 00:00:00 CST 2001
, published
Tue Dec 31 00:00:00 CST 2002
- MASIMO CORP
A signal processor which acquires a first signal, including a first desired signal portion and a first undesired signal portion, and a second signal, including a second desired signal portion and a second undesired signal portion, wherein the first and second...
US6647130 (B2), filed
Wed Jul 03 00:00:00 CDT 2002
, published
Tue Nov 11 00:00:00 CST 2003
- DIGIMARC CORP
A physical medium is encoded with machine readable information that provides a human interface to a computer system. The information encoded into the medium indicates a computer implemented process, and is encoded according to a spectral encoding scheme, such...
US6959100 (B2), filed
Wed Jun 11 00:00:00 CDT 2003
, published
Tue Oct 25 00:00:00 CDT 2005
- DIGIMARC CORP
A secure document design has a visible graphical structure that forms part of the aesthetic features on the document and carries encoded message information. A method for generating this design starts with a visible structure used for geometric registration....
US5109417 (A), filed
Fri Dec 29 00:00:00 CST 1989
, published
Tue Apr 28 00:00:00 CDT 1992
- DOLBY LAB LICENSING CORP
Quantizing noise is lessened in a speech signal system by using adaptive bit allocation for subband channels, wherein subband information of digital words is represented in block-floating-point form, and normalized mantiss as may allow dropping a sign bit.
US6111673 (A), filed
Fri Jul 17 00:00:00 CDT 1998
, published
Tue Aug 29 00:00:00 CDT 2000
- TELCORDIA TECH INC
An optical signaling header technique applicable to optical networks wherein packet routing information is embedded in the same channel or wavelength as the data payload so that both the header and data payload propagate through network elements with the same...
US6745060 (B2), filed
Mon Dec 03 00:00:00 CST 2001
, published
Tue Jun 01 00:00:00 CDT 2004
- MASIMO CORP
The present invention involves method and apparatus for analyzing two measured signals that are modeled as containing primary and secondary portions. Coefficients relate the two signals according to a model defined in accordance with the present invention. In...
US5586121 (A), filed
Fri Apr 21 00:00:00 CDT 1995
, published
Tue Dec 17 00:00:00 CST 1996
- HYBRID NETWORKS INC
An asymmetric network communication system for use in a client-server environment having independent forward and return channels operating at different speeds and/or under different protocols on the same or different communication media to provide efficient...
