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

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

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.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
LUCENT TECHNOLOGIES INC.MURRAY HILL, NJ9561

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Eizenhofer, Alfons Altdorf, DE 7 601
Grauel, Christoph Feucht, DE 6 347

Cited Art

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 47 1984

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
INTEL CORPORATION (62)
6,088,590 Method and system for mobile controlled handoff and link maintenance in spread spectrum communication 29 1994
5,887,020 Multi-band, multi-mode spread-spectrum communication system 87 1994
5,648,982 Spread spectrum transmitter 42 1994
5,742,583 Antenna diversity techniques 14 1994
5,784,403 Spread spectrum correlation using saw device 25 1995
5,640,674 Three-cell wireless communication system 6 1995
5,790,591 Spread spectrum transmitter and communications system using multiple spreading codes 67 1995
5,761,239 Method and apparatus for despreading spread spectrum signals 53 1995
5,724,383 Method for generating and encoding signals for spread spectrum communication 47 1995
5,832,022 Method and apparatus for controlling the modulation index of continuous phase modulated (CPM) signals 23 1995
5,959,980 Timing adjustment control for efficient time division duplex communication 51 1995
5,689,502 Efficient frequency division duplex communication system with interleaved format and timing adjustment control 116 1995
5,666,379 Best-of-M pulse position modulation detector 13 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 115 1995
5,796,772 Multi-band, multi-mode spread-spectrum communication system 58 1995
5,790,587 Multi-band, multi-mode spread-spectrum communication system 119 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 12 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 21 1995
5,692,007 Method and apparatus for differential phase encoding and decoding in spread-spectrum communication systems with continuous-phase modulation 12 1995
5,671,219 Communication protocol for spread spectrum communication 43 1995
5,648,955 Method for power control in a TDMA spread spectrum communication system 101 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 17 1995
5,610,940 Method and apparatus for noncoherent reception and correlation of a continous phase modulated signal 46 1995
6,041,046 Cyclic time hopping in time division multiple access communication system 23 1995
5,604,767 Spread spectrum spectral density techniques 8 1995
5,859,842 Antenna diversity techniques 24 1995
5,815,525 Multi-band, multi-mode spread-spectrum communication system 161 1996
6,005,856 Communication protocol for spread spectrum wireless communication system 43 1996
6,161,013 Wireless communication system and method 63 1996
5,991,625 Spread spectrum wireless telephone system 17 1996
6,141,373 Preamble code structure and detection method and apparatus 39 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 131 1996
6,094,421 Timing adjustment control for efficient time division duplex, frequency division duplex or hybrid time division duplex/frequency division duplex communication 127 1997
5,787,076 Multi-mode TDMA spread spectrum communication system 28 1997
6,272,121 Spread spectrum communication system using DECT protocol 16 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 12 1997
6,526,026 Digit transmission over wireless communication link 50 1997
6,097,817 Encryption and decryption in communication system with wireless trunk 45 1997
6,118,824 Spread-spectrum data publishing system 39 1998
6,983,150 Wireless cellular communication system 2 1998
6,154,486 Preamble code structure and detection method and apparatus 32 1998
6,421,368 Spread spectrum wireless communication system 1 1999
6,388,997 Timing adjustment control for efficient time division duplex communication 66 2000
6,363,107 Preamble code structure and detection method and apparatus 46 2000
7,411,936 Wireless communication method and apparatus 0 2000
6,751,205 Signaling and protocol for communication system with wireless trunk 12 2001
6,621,813 Methods and apparatus for synchronization in a wireless network 8 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 10 2002
6,947,469 Method and Apparatus for wireless spread spectrum communication with preamble processing period 5 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 (27)
6,477,354 Communication system transmitting modulated orthogonal carries with service units that scan spectrum to identify assigned band 35 1999
7,310,522 Systems for synchronous multipoint-to-point orthogonal frequency division multiplexing communication 31 2002
7,535,822 Synchronization of remote units for a communication network 14 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 1 2007
7,983,141 Synchronized multipoint-to-point communication using orthogonal frequency division 2 2007
7,912,138 Timing and symbol alignment in multipoint-to-point communication using orthogonal frequency division multiplexing 1 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 4 2007
7,957,265 Systems and method for orthogonal frequency divisional multiplexing 1 2007
7,881,180 Systems and method for orthogonal frequency divisional multiplexing 0 2007
7,881,181 Systems and method for orthogonal frequency divisional multiplexing 6 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 15 2008
7,697,453 Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing 14 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
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
 
XIRCOM WIRELESS, INC. (9)
5,802,046 Efficient time division duplex communication system with interleaved format and timing adjustment control 88 1995
5,745,484 Efficient communication system using time division multiplexing and timing adjustment control 116 1995
5,680,414 Synchronization apparatus and method for spread spectrum receiver 37 1995
5,659,574 Multi-bit correlation of continuous phase modulated signals 19 1995
6,356,607 Preamble code structure and detection method and apparatus 27 1996
8,165,028 Monitoring in communication system with wireless trunk 2 1997
6,580,906 Authentication and security in wireless communication system 33 1997
6,522,642 Antenna diversity techniques 23 1998
6,366,566 Efficient communication system using time division multiplexing and timing adjustment control 16 1999
 
SILICON VALLEY BANK COMMERCIAL FINANCE DIVISION (8)
5,805,583 Process for communicating multiple channels of digital data in distributed systems using synchronous code division multiple access 28 1995
5,768,269 Apparatus and method for establishing frame synchronization in distributed digital data communication systems 43 1995
5,966,376 Apparatus and method for digital data transmission using orthogonal cyclic codes 48 1995
5,793,759 Apparatus and method for digital data transmission over video cable using orthogonal cyclic codes 113 1996
5,745,837 Apparatus and method for digital data transmission over a CATV system using an ATM transport protocol and SCDMA 216 1996
6,356,555 Apparatus and method for digital data transmission using orthogonal codes 220 1996
5,991,308 Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant 209 1996
6,307,868 Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops 84 1997
 
TERAYON COMMUNICATION SYSTEMS, INC. (6)
6,154,456 Apparatus and method for digital data transmission using orthogonal codes 13 1998
6,665,308 Apparatus and method for equalization in distributed digital data transmission systems 84 1998
7,031,344 Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops 12 2000
7,239,650 Apparatus and method for receiving upstream data transmissions from multiple remote transmitters 12 2001
7,095,707 Apparatus and method for trellis encoding data for transmission in digital data transmission systems 30 2001
7,020,165 Apparatus and method for trellis encoding data for transmission in digital data transmission systems 14 2001
 
XIRCOM II WIRELESS, INC. (6)
5,654,978 Pulse position modulation with spread spectrum 11 1993
6,094,575 Communication system and method 91 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 13 1997
6,532,365 PCS pocket phone/microcell communication over-air protocol 28 2000
 
XIRCOM, INC. (5)
6,229,792 Spread spectrum communication system 41 1995
6,275,704 Multiple access communication system with polarized antennas 11 1997
6,282,228 Spread spectrum codes for use in communication 17 1997
6,208,627 Signaling and protocol for communication system with wireless trunk 52 1997
6,317,452 Method and apparatus for wireless spread spectrum communication with preamble sounding gap 38 1999
 
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 20 1989
 
ANDREW LLC (2)
8,125,377 System and method for determining the location of a mobile device 2 2008
8,378,888 System and method for determining the location of a mobile device 0 2012
 
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 71 1991
5,247,702 Method and an apparatus for establishing a wireless communication link between a base unit and a remote unit 46 1991
 
AVAYA INC. (2)
5,388,102 Arrangement for synchronizing a plurality of base stations 57 1993
5,801,783 Remote accurate frequency generation using a numerically controlled oscillator 4 1996
 
LOW ENVIRON AG, LLC (2)
5,530,737 Secure access telephone extension system and method 37 1993
5,852,785 Secure access telephone extension system and method in a cordless telephone system 4 1996
 
MOTOROLA, INC. (2)
4,852,090 TDMA communications system with adaptive equalization 124 1988
5,185,739 Time-allocation of radio carriers 50 1990
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (2)
5,200,957 Mobile assisted handoff 53 1991
5,229,996 Split-window time alignment 49 1992
 
AGENCE SPATIALE EUROPEENNE (1)
5,327,467 Code distribution multiple access communication system with user voice activated carrier and code synchronization 47 1991
 
ALCATEL (1)
6,813,307 Module channel for acquiring and tracking in a radio communication system 0 2000
 
ALCATEL SEL AKTIENGESELLSCHAFT (1)
5,592,469 Radio system 45 1994
 
BELL TELEPHONE LABORATORIES, INCORPORATED (1)
4,989,199 Photonic switch architecture utilizing code and wavelength multiplexing 32 1988
 
FUJITSU LIMITED (1)
5,963,873 Digital multiplex radio system 2 1997
 
II MORROW, INC. (1)
5,586,150 Method and apparatus for symbol synchronization in multi-level digital FM radio 4 1993
 
INTELLECTUAL VENTURES I LLC (1)
5,909,436 Random access orthogonal frequency division multiplex system and method 83 1996
 
LUCENT TECHNOLOGIES INC. (1)
4,799,252 Digital radio transmission system 114 1988
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
6,160,801 Mobile communication system 24 1997
 
MMS SPACE SYSTEMS LIMITED (1)
5,345,439 Multi purpose digital signal regenerative processing apparatus 160 1993
 
MOTOROLA MOBILITY LLC (1)
5,446,727 Method and apparatus for time aligning signals for reception in a code-division multiple access communication system 121 1993
 
NEC CORPORATION (1)
6,331,989 Multiplex transmission method and system 19 1998
 
NOKIA CORPORATION (1)
7,430,196 Transmission systems 1 2005
 
NOKIA MOBILE PHONES LTD. (1)
6,658,235 Method for transmitting control information in a communication system 16 2000
 
NOKIA SIEMENS 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
 
NTT MOBILE COMMUNICATIONS NETWORK INC. (1)
5,581,547 Random access communication method by CDMA and mobile station equipment using the same 45 1994
 
OMNIPOINT TECHNOLOGIES, INC. (1)
5,757,847 Method and apparatus for decoding a phase encoded signal 12 1995
 
OPUSWAVE NETWORKS, INC. (1)
5,884,148 Wireless local loop system and method 56 1996
 
PHOENIX CORPORATION (1)
5,319,634 Multiple access telephone extension systems and methods 199 1991
 
PHONEX CORPORATION (1)
5,911,119 Secure cordless telephone extension system and method 44 1996
 
SONY CORPORATION (1)
6,292,663 Communication method, transmitter and receiver 0 1998
 
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 146 1991
 
TELCORDIA TECHNOLOGIES, INC. (1)
5,481,533 Hybrid intra-cell TDMA/inter-cell CDMA for wireless networks 192 1994
 
TELEDIFFUSION DE FRANCE (1)
5,216,717 Frequency modulation broadcast transmitter synchronization method 14 1991
 
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 42 2001
 
UNIVERSITY OF TECHNOLOGY, SYDNEY (1)
5,307,341 Random access multiple user communication system 8 1992
 
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 13 1997
 
XIRCOM WIRELISS, INC. (1)
6,243,372 Methods and apparatus for synchronization in a wireless network 76 1996
 
XIROM WIRELESS, INC. (1)
5,963,586 Method and apparatus for parallel noncoherent correlation of a spread spectrum signal 11 1995
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
5,987,079 Preamble code structure and detection method and apparatus 1996