US Patent No: 4,688,210

Number of patents in Portfolio can not be more than 2000

Method of and arrangement for synchronizing the receiver arrangements in a digital multiplex transmission system

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Abstract

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A digital multiplex radio transmission system wherein transmission channels between a fixed radio station and a plurality of mobile radio stations may be established by code division multiplex or frequency division multiplex, individual message channels being separated by means of different distributions of the data symbols transmitted therein. In order to synchronize the fixed station transmitter with the mobile station receivers, respective synchronizing symbols are inserted between the successive data symbols transmitted in any channel. The synchronizing symbols used in all channels are the same, and are spaced at the same time intervals in each channel. Consequently, they are received with significantly higher energy than the data symbols, permitting the multi-path profile to be measured and providing reliable synchronization.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
LUCENT TECHNOLOGIES INC.MURRAY HILL, NJ7256

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Eizenhofer, Alfons Altdorf, DE 7 631
Grauel, Christoph Feucht, DE 6 354

Cited Art Landscape

Patent Info (Count) # Cites Year
 
NEC CORPORATION (1)
* 4,621,355 Method of synchronizing parallel channels of orthogonally multiplexed parallel data transmission system and improved automatic equalizer for use in such a transmission system 51 1984
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
WI-LAN INC. (1)
* 6,088,326 Processing data transmitted and received over a wireless link connecting a central terminal and a subscriber terminal of a wireless telecommunications system 19 1997
 
UNIVERSITY OF TECHNOLOGY, SYDNEY (1)
* 5,307,341 Random access multiple user communication system 8 1992
 
SONY CORPORATION (1)
* 6,292,663 Communication method, transmitter and receiver 0 1998
 
TELEDIFFUSION DE FRANCE S.A. (1)
* 5,216,717 Frequency modulation broadcast transmitter synchronization method 14 1991
 
MICRON TECHNOLOGY, INC. (2)
* 5,654,978 Pulse position modulation with spread spectrum 12 1993
* 5,666,379 Best-of-M pulse position modulation detector 14 1995
 
NOKIA SOLUTIONS AND NETWORKS GMBH & CO. KG (1)
6,366,569 Method and base station for transmitting data over a radio interface in a radio communications system 15 2000
 
SILICON VALLEY BANK COMMERCIAL FINANCE DIVISION (7)
* 5,805,583 Process for communicating multiple channels of digital data in distributed systems using synchronous code division multiple access 32 1995
* 5,768,269 Apparatus and method for establishing frame synchronization in distributed digital data communication systems 48 1995
* 5,793,759 Apparatus and method for digital data transmission over video cable using orthogonal cyclic codes 141 1996
* 5,745,837 Apparatus and method for digital data transmission over a CATV system using an ATM transport protocol and SCDMA 260 1996
6,356,555 Apparatus and method for digital data transmission using orthogonal codes 278 1996
* 5,991,308 Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant 282 1996
6,307,868 Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops 98 1997
 
NOKIA TECHNOLOGIES OY (1)
* 6,658,235 Method for transmitting control information in a communication system 20 2000
 
MAPLE ACQUISITION LLC (3)
* 8,125,377 System and method for determining the location of a mobile device 3 2008
* 8,378,888 System and method for determining the location of a mobile device 0 2012
* 2012/0154,220 System and Method for Determining the Location of a Mobile Device 0 2012
 
NEC CORPORATION (1)
* 6,331,989 Multiplex transmission method and system 20 1998
 
GOOGLE TECHNOLOGY HOLDINGS LLC (7)
* 5,446,727 Method and apparatus for time aligning signals for reception in a code-division multiple access communication system 133 1993
* 6,154,456 Apparatus and method for digital data transmission using orthogonal codes 14 1998
6,665,308 Apparatus and method for equalization in distributed digital data transmission systems 130 1998
7,031,344 Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops 17 2000
7,239,650 Apparatus and method for receiving upstream data transmissions from multiple remote transmitters 20 2001
7,095,707 Apparatus and method for trellis encoding data for transmission in digital data transmission systems 45 2001
7,020,165 Apparatus and method for trellis encoding data for transmission in digital data transmission systems 27 2001
 
AVAYA INC. (2)
* 5,388,102 Arrangement for synchronizing a plurality of base stations 81 1993
* 5,801,783 Remote accurate frequency generation using a numerically controlled oscillator 4 1996
 
XIRCOM II WIRELESS, INC. (5)
* 6,094,575 Communication system and method 102 1996
* 5,737,324 Method and apparatus for establishing spread spectrum communication 4 1996
* 5,850,600 Three cell wireless communication system 2 1997
* 5,953,370 Apparatus for receiving and correlating a spread spectrum signal 20 1997
6,532,365 PCS pocket phone/microcell communication over-air protocol 41 2000
 
EUROPEAN SPACE AGENCY (1)
* 5,327,467 Code distribution multiple access communication system with user voice activated carrier and code synchronization 48 1991
 
BELL TELEPHONE LABORATORIES, INCORPORATED (1)
* 4,989,199 Photonic switch architecture utilizing code and wavelength multiplexing 32 1988
 
MMS SPACE SYSTEMS LIMITED (1)
* 5,345,439 Multi purpose digital signal regenerative processing apparatus 194 1993
 
LUCENT TECHNOLOGIES INC. (1)
* 4,799,252 Digital radio transmission system 119 1988
 
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) (2)
* 5,200,957 Mobile assisted handoff 66 1991
* 5,229,996 Split-window time alignment 51 1992
 
XIRCOM, INC. (5)
6,229,792 Spread spectrum communication system 58 1995
6,275,704 Multiple access communication system with polarized antennas 16 1997
6,282,228 Spread spectrum codes for use in communication 23 1997
6,208,627 Signaling and protocol for communication system with wireless trunk 71 1997
6,317,452 Method and apparatus for wireless spread spectrum communication with preamble sounding gap 44 1999
 
OPUSWAVE NETWORKS, INC. (1)
* 5,884,148 Wireless local loop system and method 60 1996
 
XIRCOM WIRELESS, INC. (7)
* 5,802,046 Efficient time division duplex communication system with interleaved format and timing adjustment control 103 1995
* 5,745,484 Efficient communication system using time division multiplexing and timing adjustment control 127 1995
6,356,607 Preamble code structure and detection method and apparatus 31 1996
8,165,028 Monitoring in communication system with wireless trunk 3 1997
6,580,906 Authentication and security in wireless communication system 39 1997
6,522,642 Antenna diversity techniques 28 1998
6,366,566 Efficient communication system using time division multiplexing and timing adjustment control 18 1999
 
TCL COMMUNICATION TECHNOLOGY HOLDINGS LIMITED (1)
* 6,160,801 Mobile communication system 25 1997
 
FUJITSU LIMITED (1)
* 5,963,873 Digital multiplex radio system 3 1997
 
MOTOROLA, INC. (2)
* 4,852,090 TDMA communications system with adaptive equalization 130 1988
* 5,185,739 Time-allocation of radio carriers 57 1990
 
Phoenix Corporation (1)
* 5,319,634 Multiple access telephone extension systems and methods 229 1991
 
XIROM WIRELESS, INC. (1)
* 5,963,586 Method and apparatus for parallel noncoherent correlation of a spread spectrum signal 12 1995
 
INTELLECTUAL VENTURES I LLC (1)
* 5,909,436 Random access orthogonal frequency division multiplex system and method 113 1996
 
TDF (1)
* 5,228,025 Method for the broadcasting of digital data, notably for radio broadcasting at a high bit-rate towards mobile receivers, with time-frequency interlacing and assistance in the acquisition of automatic frequency control, and corresponding receiver 165 1991
 
NATIONAL SEMICONDUCTOR CORPORATION (3)
* 5,179,664 Symbol-wide elasticity buffer with a read-only section and a read-write section 9 1989
* 4,984,251 Method and apparatus for the synchronization of a cascaded multi-channel data transmission 17 1989
* 5,185,863 Byte-wide elasticity buffer 21 1989
 
TELCORDIA TECHNOLOGIES, INC. (1)
* 5,481,533 Hybrid intra-cell TDMA/inter-cell CDMA for wireless networks 202 1994
 
NTT MOBILE COMMUNICATIONS NETWORK, INC. (1)
* 5,581,547 Random access communication method by CDMA and mobile station equipment using the same 51 1994
 
II MORROW, INC. (1)
* 5,586,150 Method and apparatus for symbol synchronization in multi-level digital FM radio 5 1993
 
INTEL CORPORATION (64)
* 6,088,590 Method and system for mobile controlled handoff and link maintenance in spread spectrum communication 32 1994
* 5,887,020 Multi-band, multi-mode spread-spectrum communication system 88 1994
* 5,648,982 Spread spectrum transmitter 45 1994
* 5,742,583 Antenna diversity techniques 15 1994
* 5,784,403 Spread spectrum correlation using saw device 29 1995
* 5,640,674 Three-cell wireless communication system 7 1995
* 5,790,591 Spread spectrum transmitter and communications system using multiple spreading codes 83 1995
* 5,761,239 Method and apparatus for despreading spread spectrum signals 66 1995
* 5,724,383 Method for generating and encoding signals for spread spectrum communication 64 1995
* 5,832,022 Method and apparatus for controlling the modulation index of continuous phase modulated (CPM) signals 31 1995
* 5,959,980 Timing adjustment control for efficient time division duplex communication 60 1995
* 5,689,502 Efficient frequency division duplex communication system with interleaved format and timing adjustment control 135 1995
* 5,832,028 Method and apparatus for coherent serial correlation of a spread spectrum signal 4 1995
* 5,818,820 Method and system for data link expansion or contraction using spread spectrum TDMA communication 131 1995
* 5,796,772 Multi-band, multi-mode spread-spectrum communication system 63 1995
* 5,790,587 Multi-band, multi-mode spread-spectrum communication system 128 1995
* 5,768,264 Time division multiple access base station supporting ISDN messages 10 1995
* 5,754,584 Non-coherent spread-spectrum continuous-phase modulation communication system 21 1995
* 5,754,585 Method and apparatus for serial noncoherent correlation of a spread spectrum signal 5 1995
* 5,694,414 Multi-band, multi-mode spread-spectrum communication system 24 1995
* 5,692,007 Method and apparatus for differential phase encoding and decoding in spread-spectrum communication systems with continuous-phase modulation 13 1995
* 5,680,414 Synchronization apparatus and method for spread spectrum receiver 37 1995
* 5,671,219 Communication protocol for spread spectrum communication 44 1995
* 5,659,574 Multi-bit correlation of continuous phase modulated signals 20 1995
* 5,648,955 Method for power control in a TDMA spread spectrum communication system 114 1995
* 5,629,956 Method and apparatus for reception and noncoherent serial correlation of a continuous phase modulated signal 12 1995
* 5,627,856 Method and apparatus for receiving and despreading a continuous phase-modulated spread spectrum signal using self-synchronizing correlators 18 1995
* 5,610,940 Method and apparatus for noncoherent reception and correlation of a continous phase modulated signal 50 1995
* 6,041,046 Cyclic time hopping in time division multiple access communication system 26 1995
* 5,604,767 Spread spectrum spectral density techniques 9 1995
* 5,859,842 Antenna diversity techniques 24 1995
* 5,815,525 Multi-band, multi-mode spread-spectrum communication system 168 1996
* 6,005,856 Communication protocol for spread spectrum wireless communication system 60 1996
* 6,161,013 Wireless communication system and method 79 1996
* 5,991,625 Spread spectrum wireless telephone system 28 1996
* 6,141,373 Preamble code structure and detection method and apparatus 44 1996
* 5,856,998 Method and apparatus for correlating a continuous phase modulated spread spectrum signal 8 1996
* 6,112,080 Wireless communication method and system 147 1996
* 6,094,421 Timing adjustment control for efficient time division duplex, frequency division duplex or hybrid time division duplex/frequency division duplex communication 156 1997
* 5,787,076 Multi-mode TDMA spread spectrum communication system 28 1997
6,272,121 Spread spectrum communication system using DECT protocol 20 1997
* 5,742,638 Spread-spectrum data publishing system 5 1997
* 6,115,412 Spread spectrum wireless telephone system 6 1997
* 5,881,100 Method and apparatus for coherent correlation of a spread spectrum signal 13 1997
6,526,026 Digit transmission over wireless communication link 93 1997
* 6,097,817 Encryption and decryption in communication system with wireless trunk 58 1997
* 6,118,824 Spread-spectrum data publishing system 43 1998
6,983,150 Wireless cellular communication system 5 1998
* 6,154,486 Preamble code structure and detection method and apparatus 44 1998
6,421,368 Spread spectrum wireless communication system 1 1999
6,388,997 Timing adjustment control for efficient time division duplex communication 100 2000
6,363,107 Preamble code structure and detection method and apparatus 53 2000
7,411,936 Wireless communication method and apparatus 0 2000
* 2001/0000,136 Wireless communication method and apparatus 3 2000
6,751,205 Signaling and protocol for communication system with wireless trunk 19 2001
6,621,813 Methods and apparatus for synchronization in a wireless network 9 2001
6,891,816 Spread spectrum communication system using DECT protocol 3 2001
6,621,852 Spread spectrum wireless communication system 1 2001
7,322,041 Authentication and security in wireless communication system 12 2002
6,947,469 Method and Apparatus for wireless spread spectrum communication with preamble processing period 8 2002
7,359,364 Monitoring in communication system with wireless trunk 5 2002
7,079,500 Digit transmission over wireless communication link 4 2003
7,120,187 Spread spectrum wireless communication system 0 2003
7,774,278 Wireless access unit with trunk interface 0 2004
 
HTC CORPORATION (31)
* 6,477,354 Communication system transmitting modulated orthogonal carries with service units that scan spectrum to identify assigned band 44 1999
7,310,522 Systems for synchronous multipoint-to-point orthogonal frequency division multiplexing communication 56 2002
7,535,822 Synchronization of remote units for a communication network 29 2006
7,672,219 Multipoint-to-point communication using orthogonal frequency division multiplexing 1 2007
7,675,843 Multipoint-to-point communication using orthogonal frequency division multiplexing 4 2007
7,983,141 Synchronized multipoint-to-point communication using orthogonal frequency division 7 2007
7,912,138 Timing and symbol alignment in multipoint-to-point communication using orthogonal frequency division multiplexing 2 2007
8,351,321 Systems and method for orthogonal frequency divisional multiplexing 0 2007
8,199,632 Systems and method for orthogonal frequency divisional multiplexing 1 2007
8,174,956 Systems and method for orthogonal frequency divisional multiplexing 0 2007
8,089,853 Systems and method for orthogonal frequency divisional multiplexing 0 2007
7,995,454 Systems and method for orthogonal frequency divisional multiplexing 14 2007
* 7,957,265 Systems and method for orthogonal frequency divisional multiplexing 2 2007
7,881,180 Systems and method for orthogonal frequency divisional multiplexing 1 2007
7,881,181 Systems and method for orthogonal frequency divisional multiplexing 9 2007
7,936,662 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 0 2007
7,872,985 System for multi-frame alignment 0 2008
7,773,537 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system 1 2008
7,756,060 Tone allocation in multipoint-to-point communication using orthogonal frequency division multiplexing 0 2008
7,706,349 Methods and systems for selecting modulation in an orthogonal frequency division multiplexing system 19 2008
7,697,453 Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing 19 2008
8,213,398 Method for multiple use subchannels 0 2009
8,213,399 System for multiple use subchannels 0 2009
RE41771 System for multiple use subchannels 0 2009
RE42236 Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing 0 2009
RE44460 Systems for synchronous multipoint-to-point orthogonal frequency division multiplexing communication 0 2011
8,406,115 Systems and methods for orthogonal frequency division multiplexing 0 2011
8,315,150 Synchronized multipoint-to-point communication using orthogonal frequency division 0 2011
8,576,693 Systems and method for orthogonal frequency division multiplexing 0 2011
8,547,824 Systems and methods for orthogonal frequency divisional multiplexing 0 2012
8,638,655 Systems and method for orthogonal frequency divisional multiplexing 0 2012
 
ALCATEL (1)
6,813,307 Module channel for acquiring and tracking in a radio communication system 1 2000
 
PHONEX CORPORATION (1)
* 5,911,119 Secure cordless telephone extension system and method 58 1996
 
LOW ENVIRON AG, LLC (2)
* 5,530,737 Secure access telephone extension system and method 47 1993
5,852,785 Secure access telephone extension system and method in a cordless telephone system 4 1996
 
ALCATEL SEL AKTIENGESELLSCHAFT (1)
* 5,592,469 Radio system 49 1994
 
TERAYON CORPORATION (1)
* 5,966,376 Apparatus and method for digital data transmission using orthogonal cyclic codes 54 1995
 
XIRCOM WIRELISS, INC. (1)
6,243,372 Methods and apparatus for synchronization in a wireless network 89 1996
 
OMNIPOINT TECHNOLOGIES, INC. (1)
* 5,757,847 Method and apparatus for decoding a phase encoded signal 13 1995
 
Terayon Communications System, Inc., a Delaware Corporation (1)
6,937,617 Apparatus and method for trellis encoding data for transmission in digital data transmission systems 49 2001
 
ATMEL CORPORATION (2)
* 5,267,244 Method and an apparatus for establishing the functional capabilities for wireless communications between a base unit and a remote unit 78 1991
* 5,247,702 Method and an apparatus for establishing a wireless communication link between a base unit and a remote unit 49 1991
 
NOKIA CORPORATION (1)
* 7,430,196 Transmission systems 3 2005
 
OMNIPOINT CORPORATION (1)
5,987,079 Preamble code structure and detection method and apparatus 0 1996
* Cited By Examiner