US Patent No: 7,218,625

Number of patents in Portfolio can not be more than 2000

Initial power control for spread-spectrum communications

ALSO PUBLISHED AS: 7535874, 20050094604

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Abstract

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A code-division-multiple-access (CDMA) system employing spread-spectrum modulation. The CDMA system has a base station, and a plurality of subscriber units. The signals transmitted between the base station and subscriber unit use spread-spectrum modulation. The system and method transmits from the base station, a synchronization channel having a chip-sequence signal used by the plurality of subscriber units for synchronization. A first subscriber unit receives the synchronization channel, and determines timing from the synchronization channel. In order to initiate communications with the base station, the first subscriber unit transmits an access signal. The access signal has a plurality of power levels, which typically ramp up. The base station receives the access signal at a particular-power level. The base station then transmits to the first subscriber unit an acknowledgment signal. The first subscriber unit receives the acknowledgment signal, and transmits to the base station, a spread-spectrum signal.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
INTERDIGITAL TECHNOLOGY CORPORATIONWILMINGTON, DE1628

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kowalski, John Camas, WA 77 1604
Lomp, Gary R Centerport, NY 123 1360
Ozluturk, Fatih M Port Washington, NY 235 1261

Cited Art Landscape

Patent Info (Count) # Cites Year
 
QUALCOMM INCORPORATED (31)
4,901,307 Spread spectrum multiple access communication system using satellite or terrestrial repeaters 1429 1986
5,056,109 Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system 859 1989
5,109,390 Diversity receiver in a CDMA cellular telephone system 767 1989
5,193,094 Method and apparatus for generating super-orthogonal convolutional codes and the decoding thereof 83 1990
5,103,459 System and method for generating signal waveforms in a CDMA cellular telephone system 1578 1990
5,107,225 High dynamic range closed loop automatic gain control circuit 111 1990
5,265,119 Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system 395 1991
5,257,283 Spread spectrum transmitter power control method and system 305 1991
5,267,262 Transmitter power control system 441 1991
5,416,797 System and method for generating signal waveforms in a CDMA cellular telephone system 368 1992
5,392,287 Apparatus and method for reducing power consumption in a mobile communications receiver 253 1992
5,309,474 System and method for generating signal waveforms in a CDMA cellular telephone system 314 1992
5,228,054 Power-of-two length pseudo-noise sequence generator with fast offset adjustment 122 1992
5,396,516 Method and system for the dynamic modification of control paremeters in a transmitter power control system 236 1993
5,283,536 High dynamic range closed loop automatic gain control circuit 54 1993
5,414,728 Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels 239 1993
5,485,486 Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system 286 1994
5,604,730 Remote transmitter power control in a contention based multiple access system 190 1994
5,528,593 Method and apparatus for controlling power in a variable rate communication system 139 1994
5,691,974 Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking individual recipient phase, time and energy 192 1995
5,568,483 Method and apparatus for the formatting of data for transmission 97 1995
5,594,718 Method and apparatus for providing mobile unit assisted hard handoff from a CDMA communication system to an alternative access communication system 144 1995
5,710,768 Method of searching for a bursty signal 95 1995
5,675,581 Simulating user interference in a spread spectrum communication network 85 1996
5,884,187 Method and apparatus for providing centralized power control administration for a set of base stations 124 1996
5,596,570 System and method for simulating interference received by subscriber units in a spread spectrum communication network 110 1996
5,881,368 Method and apparatus of power control in a CDMA dispatch system 106 1996
5,884,196 Method and apparatus of preserving power of a remote unit in a dispatch system 130 1996
6,072,787 High-speed data transmission in a digital mobile communication system 80 1996
6,763,244 Method and apparatus for adjusting power control setpoint in a wireless communication system 53 2001
6,760,321 Method and apparatus for block-based chip timing estimation in a code division multiple access communication system 18 2002
 
INTERDIGITAL TECHNOLOGY CORPORATION (23)
5,093,840 Adaptive power control for a spread spectrum transmitter 194 1990
5,228,056 Synchronous spread-spectrum communications system and method 232 1990
5,166,951 High capacity spread spectrum channel 121 1991
5,299,226 Adaptive power control for a spread spectrum communications system and method 104 1991
5,224,120 Dynamic capacity allocation CDMA spread spectrum communications 139 1992
5,367,533 Dynamic capacity allocation CDMA spread spectrum communications 44 1993
5,420,896 Synchronous spread-spectrum communications system and method 59 1993
5,410,568 CDMA/TDMA spread-spectrum communications system and method 129 1993
5,365,544 CDMA communications and geolocation system and method 116 1994
5,459,759 Frequency hopping code division multiple access system and method 67 1994
5,506,864 CDMA communications and geolocation system and method 122 1994
5,657,343 Frequency hopping code division multiple access system and method 50 1995
5,748,687 Spreading code sequence acquisition system and method that allows fast acquisition in code division multiple access (CDMA) systems 37 1996
5,796,776 Code sequence generator in a CDMA modem 91 1996
5,841,768 Method of controlling initial power ramp-up in CDMA systems by using short codes 93 1996
5,940,382 Virtual locating of a fixed subscriber unit to reduce re-acquisition time 51 1996
5,953,346 CDMA communication system which selectively suppresses data transmissions during establishment of a communication channel 35 1996
6,049,535 Code division multiple access (CDMA) communication system 99 1997
6,212,174 Capacity management method for a code division multiple access (CDM) communication system 42 1997
6,272,168 Code sequence generator in a CDMA modem 115 1998
6,381,264 Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system 22 1999
6,229,843 Pilot adaptive vector correlator 39 1999
6,721,301 Centroid tracking for spread-spectrum communications 28 2001
 
NEC CORPORATION (8)
5,519,736 Synchronous pseudo-noise code sequence generation circuit 56 1994
5,528,624 DS/CDMA receiver using parallel-operating multi-purpose correlators 67 1994
5,548,613 DS/CDMA receiver using moving-averaged pilot signals for weighting and phase rotation of orthogonal data symbol vectors 88 1994
5,550,811 Sync acquisition and tracking circuit for DS/CDMA receiver 94 1994
5,563,912 High efficiency speech coding apparatus and transit switching system employing the same 46 1995
5,812,593 De-spread code phase detection apparatus in spread spectrum type receiver 68 1995
6,104,748 Spread spectrum signal receiving apparatus 35 1996
5,771,451 Method of transmission power control in a cellular mobile communication system and apparatus thereof 86 1996
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (7)
5,241,690 Method for regulating power in a digital mobile telephony system 139 1991
5,295,152 TDMA for mobile access in a CDMA system 115 1992
5,420,864 Method of effecting random access in a mobile radio system 85 1993
5,341,397 CDMA frequency allocation 66 1993
5,544,156 Direct sequence CDMA coherent uplink detector 93 1994
6,708,041 Base station transmit power control in a CDMA cellular telephone system 59 1998
6,519,461 Channel-type switching from a common channel to a dedicated channel based on common channel load 104 1999
 
INTEL CORPORATION (6)
4,480,307 Interface for use between a memory and components of a module switching apparatus 131 1982
5,673,286 Spread spectrum multipath processor system and method 64 1995
5,790,591 Spread spectrum transmitter and communications system using multiple spreading codes 75 1995
5,689,502 Efficient frequency division duplex communication system with interleaved format and timing adjustment control 127 1995
5,959,980 Timing adjustment control for efficient time division duplex communication 57 1995
6,463,295 Power control with signal quality estimation for smart antenna communication systems 119 1998
 
LUCENT TECHNOLOGIES INC. (6)
5,870,378 Method and apparatus of a multi-code code division multiple access receiver having a shared accumulator circuits 71 1996
5,881,056 Method and apparatus of a multi-code code division multiple access receiver having shared accumulator circuits 63 1996
6,088,335 Code division multiple access system providing load and interference based demand assignment service to users 158 1997
6,434,124 Adaptive symbol error count based technique for CDMA reverse link outer loop power control 32 1998
6,141,374 Method and apparatus for generating multiple matched-filter PN vectors in a CDMA demodulator 68 1998
6,549,565 Code division multiple access system and method of operation with improved signal acquisition and processing 27 1999
 
MOTOROLA, INC. (6)
5,115,429 Dynamic encoding rate control minimizes traffic congestion in a packet network 242 1990
5,276,907 Method and apparatus for dynamic distribution of a communication channel load in a cellular radio communication system 148 1991
5,204,876 Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system 154 1991
5,159,283 Power amplifier 69 1991
5,245,629 Method for compensating for capacity overload in a spread spectrum communication system 130 1991
5,235,614 Method and apparatus for accommodating a variable number of communication channels in a spread spectrum communication system 106 1992
 
ERICSSON GE MOBILE COMMUNICATIONS INC. (4)
5,353,352 Multiple access coding for radio communications 148 1992
5,305,349 Quantized coherent rake receiver 179 1993
5,430,760 Random access in mobile radio telephone systems 187 1994
5,377,183 Calling channel in CDMA communications system 130 1994
 
MOTOROLA MOBILITY LLC (4)
5,299,228 Method and apparatus of reducing power consumption in a CDMA communication unit 142 1992
5,329,547 Method and apparatus for coherent communication in a spread-spectrum communication system 139 1993
5,365,585 Method and apparatus for encryption having a feedback register with selectable taps 65 1993
5,619,524 Method and apparatus for coherent communication reception in a spread-spectrum communication system 167 1995
 
RICOH COMPANY, LTD. (4)
4,583,124 Facsimile communication control system 60 1984
4,630,126 Method of signal transmission with selected signal transmission rate 67 1984
5,105,423 Digital transmission device having an error correction mode and method for shifting down a data transmission rate 96 1989
5,418,624 Negotiation method and apparatus enabling a facsimile machine to use async data communication protocols 52 1992
 
APPLE INC. (3)
5,509,126 Method and apparatus for a dynamic, multi-speed bus architecture having a scalable interface 88 1993
5,875,400 Cellular mobile communications system 67 1995
5,828,662 Medium access control scheme for data transmission on code division multiple access (CDMA) wireless systems 117 1996
 
CANON KABUSHIKI KAISHA (3)
5,351,134 Image communication system, and image communication apparatus and modem used in the system 82 1992
5,442,662 Code-division multiple-access communication system providing enhanced capacity within limited bandwidth 126 1994
5,627,835 Artificial window size interrupt reduction system for CDMA receiver 42 1995
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (3)
4,292,623 Port logic for a communication bus system 85 1979
5,276,684 High performance I/O processor 77 1991
5,117,385 Table lookup multiplier with digital filter 59 1991
 
NTT DOCOMO, INC. (3)
5,652,765 Receiver and repeater for spread spectrum communications 62 1995
5,638,362 Correlation detector and communication apparatus 76 1995
5,898,665 Coherent tracking apparatus and method for CDMA receiver 73 1996
 
NTT MOBILE COMMUNICATIONS NETWORK INC. (3)
5,420,850 Mobile station and cell selecting method for code division multiplex access mobile communication 70 1994
5,574,983 Base station device and mobile station device in mobile communication system utilizing the site diversity effect in soft handover state 87 1994
5,878,350 Scheme for controlling transmission powers during soft handover in a CDMA mobile communication system 40 1997
 
SAMSUNG ELECTRONICS CO., LTD. (3)
5,712,869 Data transmitter and receiver of a spread spectrum communication system using a pilot channel 121 1995
6,778,551 Collision control systems and methods utilizing an inter-frame gap code counter 13 1999
6,654,613 Device and method of continuous outer-loop power control in DTX mode for CDMA mobile communication system 61 2000
 
SONY CORPORATION (3)
5,321,721 Spread spectrum communication system and transmitter-receiver 52 1992
5,343,335 Signal processing system having intersymbol-interference cancelling means and method of same 36 1993
5,644,590 Spread spectrum communication apparatus and signal intensity detection apparatus 43 1995
 
AGENCE SPATIALE EUROPEENNE (2)
5,327,467 Code distribution multiple access communication system with user voice activated carrier and code synchronization 48 1991
5,327,455 Method and device for multiplexing data signals 198 1993
 
AGILENT TECHNOLOGIES, INC. (2)
5,140,613 Baseband modulation system with improved ROM-based digital filter 62 1990
5,446,683 Methods and apparatus for generating pseudo-random binary patterns 98 1994
 
AT&T Bell Laboratories (2)
5,353,302 Signal despreader for CDMA systems 84 1993
5,361,276 All digital maximum likelihood based spread spectrum receiver 148 1993
 
AT&T CORP. (2)
6,018,528 System and method for optimizing spectral efficiency using time-frequency-code slicing 162 1994
5,442,625 Code division multiple access system providing variable data rate access to a user 298 1994
 
Bell Telephone Laboratories, Incorporated (2)
4,458,314 Circuitry for allocating access to a demand shared bus 48 1982
5,050,004 Facsimile machine transmission rate fall-back arrangement 50 1989
 
ERICSSON GE MOBILE COMMUNICATIONS HOLDING INC. (2)
5,237,586 Rake receiver with selective ray combining 190 1992
5,345,598 Duplex power control system in a communication network 131 1992
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (2)
5,487,089 Nyquist filter for digital modulation 43 1993
5,488,629 Signal processing circuit for spread spectrum communications 92 1994
 
NOKIA MOBILE PHONES LTD. (2)
5,440,597 Double dwell maximum likelihood acquisition system with continuous decision making for CDMA and direct spread spectrum system 108 1993
5,654,980 Method for controlling a receiver, and a receiver 57 1995
 
NOVATEL INC. (2)
5,414,729 Pseudorandom noise ranging receiver which compensates for multipath distortion by making use of multiple correlator time delay spacing 212 1993
5,692,008 Apparatus for estimating a line of sight signal propagation time using a reduced-multipath correlation function 60 1995
 
SIEMENS AKTIENGESELLSCHAFT (2)
4,320,513 Electric circuit for the production of a number of different codes 51 1972
4,802,189 Method and circuit arrangement for the transmission of data signals between subscriber stations of a data network 33 1984
 
UNWIRED PLANET, LLC (2)
5,430,724 TDMA on a cellular communications system PCM link 53 1993
6,292,519 Correction of signal-to-interference ratio measurements 74 1998
 
XIRCOM WIRELESS, INC. (2)
5,745,484 Efficient communication system using time division multiplexing and timing adjustment control 123 1995
5,802,046 Efficient time division duplex communication system with interleaved format and timing adjustment control 96 1995
 
ADVANCED MICRO DEVICES, INC. (1)
4,425,665 FSK Voiceband modem using digital filters 71 1981
 
ADVANTRA INTERNATIONAL N.V. (1)
5,363,377 Communications system and receiver for use therein which indicates time based on a selected time message signal from a central station 75 1993
 
AG COMMUNICATION SYSTEMS CORPORATION, 2500 W. UTOPIA RD., PHOENIX, AZ 85027, A DE CORP. (1)
4,744,079 Data packet multiplexer/demultiplexer 30 1986
 
ALCATEL N.V. (1)
5,373,502 Process, transmitter and receiver for data transmission with variable traffic volume and a control station for coordinating several such transmitters and receivers 191 1993
 
Altralight, Inc. (1)
5,991,332 Adaptive matched filter and vector correlator for a code division multiple access (CDMA) modem 64 1998
 
ATC TECHNOLOGIES, LLC (1)
5,878,329 Power control of an integrated cellular communications system 204 1997
 
AUSPEX SYSTEMS, INC. (1)
5,355,453 Parallel I/O network file server architecture 409 1992
 
BULL SAS (1)
5,253,347 Centralized arbitration system using the status of target resources to selectively mask requests from master units 46 1992
 
CELSAT CORPORATION (1)
5,446,756 Integrated cellular communications system 327 1993
 
CLARION CO., LTD. (1)
5,574,754 Sliding correlator 54 1995
 
EASTMAN KODAK COMPANY (1)
5,311,459 Selectively configurable integrated circuit device for performing multiple digital signal processing functions 43 1992
 
ERICSSON AB (1)
6,587,447 Method and system for performing outer loop power control in discontinuous transmission mode 43 1999
 
FIPA FROHWITTER INTELLECTUAL PROPERTY AG (1)
5,559,790 Spread spectrum communication system and transmission power control method therefor 139 1995
 
GEC PLESSEY TELECOMMUNICATIONS LIMITED (1)
4,385,206 Programmable port sense and control signal preprocessor for a central office switching system 61 1980
 
GENERAL DYNAMICS C4 SYSTEMS, INC. (1)
5,349,606 Apparatus for multipath DSSS communications 54 1992
 
GILAT SATELLITE NETWORKS LTD. (1)
5,084,900 Spread spectrum system with random code retransmission 80 1989
 
GOOGLE INC. (1)
5,627,855 Programmable two-part matched filter for spread spectrum 52 1995
 
HARRIS STRATEX NETWORKS CANADA, ULC (1)
5,396,539 Cellular data overlay system for storing data identifying selected data allocated channels 132 1993
 
HEWLETT-PACKARD COMPANY (1)
4,768,145 Bus system 31 1984
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
5,287,463 Method and apparatus for transferring information over a common parallel bus using a fixed sequence of bus phase transitions 52 1990
 
HITACHI COMMUNICATION TECHNOLOGIES, LTD. (1)
6,122,292 Dynamic band allocation system 34 1998
 
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. (1)
5,258,940 Distributed arithmetic digital filter in a partial-response maximum-likelihood disk drive system 41 1992
 
HITACHI, LTD. (1)
4,403,322 Voice signal converting device 72 1981
 
Inteq, Inc. (1)
4,384,307 Facsimile communications interface adapter 52 1979
 
ITT MANUFACTURING ENTERPRISES, INC. (1)
5,483,549 Receiver having for charge-coupled-device based receiver signal processing 211 1994
 
KALPANA, INC. (1)
5,561,669 Computer network switching system with expandable number of ports 231 1994
 
KOREA TELECOMMUNICATION AUTHORITY (1)
5,199,061 Communication method and equipment for freeze-frame video phone 48 1992
 
LOCKHEED MARTIN CORPORATION (1)
5,414,732 Adaptive equalizer and method for operation at high symbol rates 42 1993
 
LOCUTION PITCH LLC (1)
5,722,051 Adaptive power control and coding scheme for mobile radio systems 59 1996
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (1)
4,608,700 Serial multi-drop data link 61 1982
 
MATRA COMMUNICATION (1)
5,448,600 Method for selecting propagation paths retained for receiving messages transmitted by CDMA radiocommunication 88 1994
 
MINDSPEED TECHNOLOGIES, INC. (1)
4,811,262 Distributed arithmetic realization of second-order normal-form digital filter 33 1986
 
MITCHELL MEDINA (1)
5,274,474 Integrated telefacsimile and character communication system with standard and high speed modes 49 1991
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
5,113,525 Linear-modulation type radio transmitter 61 1990
 
Monolith Technologies Corporation (1)
5,287,299 Method and apparatus for implementing a digital filter employing coefficients expressed as sums of 2 to an integer power 46 1992
 
MOTOROLA MOBILITY, INC. (1)
5,216,692 Method and apparatus for adjusting a power control threshold in a communication system 102 1992
 
MOTOROLA SOLUTIONS, INC. (1)
5,297,162 System and method for bit timing synchronization in an adaptive direct sequence CDMA communication system 118 1993
 
NATIONAL SEMICONDUCTOR CORPORATION (1)
5,379,242 ROM filter 34 1993
 
North American Philips Corporation (1)
4,862,402 Fast multiplierless architecture for general purpose VLSI FIR digital filters with minimized hardware 42 1986
 
NORTHERN TELECOM LIMITED (1)
4,675,865 Bus interface 45 1985
 
NORTHROP GRUMMAN SYSTEMS CORPORATION (1)
5,262,974 Programmable canonic signed digit filter chip 41 1991
 
PENDRAGON ELECTRONICS AND TELECOMMUNICATIONS RESEARCH LLC (1)
5,619,526 CDMA base station modulator for digital cellular mobile communication systems 62 1994
 
Picker International, Inc. (1)
5,159,551 Prism architecture for CT scanner image reconstruction 25 1989
 
RADISYS CORPORATION (1)
4,570,220 High speed parallel bus and data transfer method 139 1983
 
RESEARCH IN MOTION LIMITED (1)
5,404,376 Navigation assistance for call handling in mobile telephone systems 157 1993
 
RPX CORPORATION (1)
5,406,559 Isochronous link protocol 43 1992
 
SAIT SYSTEMS (1)
5,872,810 Programmable modem apparatus for transmitting and receiving digital data, design method and use method for said modem 167 1996
 
SCS MOBILECOM CORPORATION, A CORPORATION OF NEW YORK (1)
5,260,967 CDMA/TDMA spread-spectrum communications system and method 154 1992
 
Sharp Corporation (1)
4,914,574 Data transmission apparatus having cascaded data processing modules for daisy chain data transfer 47 1988
 
TAGGERT HOLDINGS LLC (1)
5,166,952 Method and apparatus for the reception and demodulation of spread spectrum radio signals 164 1990
 
TELEMECANIQUE, A CORP (1)
5,398,243 Arbitration method and bus for serial data transmission 39 1992
 
TEXAS INSTRUMENTS INCORPORATED (1)
4,646,232 Microprocessor with integrated CPU, RAM, timer, bus arbiter data for communication system 121 1984
 
The Boeing Company (1)
5,341,396 Multi-rate spread system 152 1993
 
The Johns Hopkins University (1)
4,667,192 Method and apparatus for bus arbitration using a pseudo-random sequence 37 1986
 
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration (1)
5,347,536 Multipath noise reduction for spread spectrum signals 203 1993
 
Thomson-CSF (1)
4,709,343 Variable-passband variable-phase digital filter 41 1984
 
TRIMBLE NAVIGATION LIMITED (1)
5,966,403 Code multipath error estimation using weighted correlations 52 1996
 
UNISYS CORPORATION (1)
5,022,049 Multiple access code acquisition system 92 1989
 
WAVE WIRELESS CORP. (1)
5,253,268 Method and apparatus for the correlation of sample bits of spread spectrum radio signals 149 1991
 
YOZAN INC. (1)
5,781,584 Code acquisition and tracking circuit using switched matched filter and sliding correlators 34 1996
 
Other [Check patent profile for assignment information] (2)
4,811,421 Transmission power control device in a radio communication transmitting/receiving station 195 1987
5,339,174 Facsimile machine time shifting and converting apparatus 61 1989

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