USRE42021E1 - Equalizer performance enhancements for broadband wireless applications - Google Patents
Equalizer performance enhancements for broadband wireless applications Download PDFInfo
- Publication number
- USRE42021E1 USRE42021E1 US11/187,034 US18703405A USRE42021E US RE42021 E1 USRE42021 E1 US RE42021E1 US 18703405 A US18703405 A US 18703405A US RE42021 E USRE42021 E US RE42021E
- Authority
- US
- United States
- Prior art keywords
- equalizer
- burst
- remote site
- site
- tap values
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime, expires
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
- H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0012—Modulated-carrier systems arrangements for identifying the type of modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3809—Amplitude regulation arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03375—Passband transmission
- H04L2025/03401—PSK
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03375—Passband transmission
- H04L2025/0342—QAM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03592—Adaptation methods
- H04L2025/03598—Algorithms
- H04L2025/03611—Iterative algorithms
- H04L2025/03656—Initialisation
- H04L2025/03668—Initialisation to the value at the end of a previous adaptation period
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03777—Arrangements for removing intersymbol interference characterised by the signalling
- H04L2025/03783—Details of reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
- H04L7/002—Arrangements for synchronising receiver with transmitter correction of synchronization errors correction by interpolation
- H04L7/0029—Arrangements for synchronising receiver with transmitter correction of synchronization errors correction by interpolation interpolation of received data signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
- H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
- H04L7/042—Detectors therefor, e.g. correlators, state machines
Abstract
Description
W(k)=W(k−1)−μ∇J
∇CkJ=−2x(k−c)ε*(k)
ε(k)=d(k)−W(k)HX(k)
-
- ε=the error between the desired signal (training or decisions) and the filtered signal complex (I and Q channels) signal X
- d=The desired signal from a training sequence or feedback decisions
- W=The complex vector of the filter taps
- X=The input signal.
-
- 1) The preamble is a mixture of both End Points and Middle QAM-64 Points
- 2) The Preamble is chosen for Uplink and Downlink Differently so that Adjacent home bases will not detect each other as transmitting remote sites
∅eq=angle(c−1h−1+c0h0+c1h1)
-
- for raised cosine filter,
- with α of 0.25
∅eq=angle(0.627c−1+c0+0.627c1)
∅eq=angle(c0h0+c1h1)
-
- for raised cosine filter,
- with α of 0.25
∅eq=angle(c0+0.627c1)
Claims (120)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/187,034 USRE42021E1 (en) | 2001-03-05 | 2005-07-20 | Equalizer performance enhancements for broadband wireless applications |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/800,268 US6597733B2 (en) | 2001-03-05 | 2001-03-05 | Equalizer performance enhancements for broadband wireless applications |
US11/187,034 USRE42021E1 (en) | 2001-03-05 | 2005-07-20 | Equalizer performance enhancements for broadband wireless applications |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/800,268 Reissue US6597733B2 (en) | 2001-03-05 | 2001-03-05 | Equalizer performance enhancements for broadband wireless applications |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE42021E1 true USRE42021E1 (en) | 2011-01-04 |
Family
ID=25177935
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/800,268 Ceased US6597733B2 (en) | 2001-03-05 | 2001-03-05 | Equalizer performance enhancements for broadband wireless applications |
US11/187,034 Expired - Lifetime USRE42021E1 (en) | 2001-03-05 | 2005-07-20 | Equalizer performance enhancements for broadband wireless applications |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/800,268 Ceased US6597733B2 (en) | 2001-03-05 | 2001-03-05 | Equalizer performance enhancements for broadband wireless applications |
Country Status (2)
Country | Link |
---|---|
US (2) | US6597733B2 (en) |
WO (1) | WO2002071608A1 (en) |
Cited By (4)
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US20080279316A1 (en) * | 2007-05-08 | 2008-11-13 | Mediatek Inc. | Method and apparatus for data reception |
US20100203826A1 (en) * | 2009-02-10 | 2010-08-12 | Fujitsu Limited | Data relay apparatus, communication apparatus and communication method |
US20190245571A1 (en) * | 2016-11-24 | 2019-08-08 | Continental Automotive France | Optimized demodulation of rds signals in digital radio |
US11196592B1 (en) * | 2020-07-24 | 2021-12-07 | Credo Technology Group Limited | Equalizer with perturbation effect based adaptation |
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US20020021750A1 (en) * | 2000-05-12 | 2002-02-21 | Belotserkovsky Maxim B. | Method and apparatus for selective equalizer tap initialization in an OFDM system |
US7133442B2 (en) * | 2001-03-29 | 2006-11-07 | Hewlett-Packard Development Company, L.P. | Rapid identification of transmission media channel characteristics |
WO2002101939A2 (en) * | 2001-06-08 | 2002-12-19 | Broadcom Corporation | Robust burst detection and acquisition system and method |
TW561686B (en) * | 2001-07-17 | 2003-11-11 | Syncomm Technology Corp | Phase demodulator, symbol clock recovering circuit and its method |
JP4127757B2 (en) * | 2001-08-21 | 2008-07-30 | 株式会社エヌ・ティ・ティ・ドコモ | Wireless communication system, communication terminal apparatus, and burst signal transmission method |
GB0126130D0 (en) * | 2001-10-31 | 2002-01-02 | Nokia Corp | Frequency error estimation |
US7660344B2 (en) * | 2002-06-28 | 2010-02-09 | Bwa Technology, Inc. | AGC fine-tuning by the adaptive time domain equalizer |
US7096132B2 (en) * | 2002-10-17 | 2006-08-22 | Qualcomm Incorporated | Procedure for estimating a parameter of a local maxima or minima of a function |
US6873910B2 (en) | 2002-10-22 | 2005-03-29 | Qualcomm Incorporated | Procedure for searching for position determination signals using a plurality of search modes |
US7027539B2 (en) * | 2002-12-09 | 2006-04-11 | Broadcom Corporation | Pipeline architecture for multi-slot wireless link processing |
US7342979B2 (en) | 2002-12-09 | 2008-03-11 | Broadcom Corporation | Incremental redundancy support in a cellular wireless terminal having IR processing module |
GB2396493B (en) * | 2002-12-17 | 2006-01-04 | Thales Plc | Communications system |
US7349462B2 (en) * | 2002-12-23 | 2008-03-25 | International Business Machines Corporation | Acquisition and adjustment of gain, receiver clock frequency, and symbol timing in an OFDM radio receiver |
US7756483B2 (en) | 2003-06-16 | 2010-07-13 | Broadcom Corporation | Adaptive channel quality estimation algorithm to support link adaptation |
US7406139B2 (en) | 2003-06-16 | 2008-07-29 | Broadcom Corporation | System and method to identify a modulation format of a data frame within a cellular wireless network |
US7068735B2 (en) | 2003-06-16 | 2006-06-27 | Broadcom Corp. | System and method to perform DC compensation on a radio frequency burst in a cellular wireless network |
US7107080B2 (en) | 2003-06-16 | 2006-09-12 | Broadcom Corporation | System and method to conduct idle mode paging channel monitoring within a cellular wireless network |
US7342956B2 (en) | 2003-06-16 | 2008-03-11 | Broadcom Corporation | System and method to extract uplink status flag bits in a cellular wireless network |
WO2005006692A1 (en) * | 2003-07-15 | 2005-01-20 | Philips Intellectual Property & Standards Gmbh | Adaptive equaliser apparatus and method |
US7382719B2 (en) * | 2003-09-05 | 2008-06-03 | Texas Instruments Incorporated | Scalable and backwards compatible preamble for OFDM systems |
US7457379B2 (en) | 2003-10-16 | 2008-11-25 | Broadcom Corporation | Adaptive multi-step combined DC offset compensation for EDGE 8-PSK |
US7672268B2 (en) * | 2004-06-18 | 2010-03-02 | Kenneth Stanwood | Systems and methods for implementing double wide channels in a communication system |
US7525926B2 (en) * | 2004-08-02 | 2009-04-28 | Atheros Communications, Inc. | Wireless communication using beam forming and diversity |
US7583608B2 (en) * | 2004-10-27 | 2009-09-01 | Intel Corporation | Link adaption based MMSE equalization eliminates noise power estimation |
US7574175B2 (en) * | 2004-11-01 | 2009-08-11 | Broadcom Corporation | Method and system for selective equalization enablement based on modulation type |
US7720179B2 (en) * | 2005-05-27 | 2010-05-18 | Marvell World Trade Ltd. | Method for timing detection |
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DE602006020357D1 (en) * | 2006-07-11 | 2011-04-07 | Freescale Semiconductor Inc | RECIPIENTS RECEIVING AT LEAST TWO TYPES OF SIGNALS, DATA COMMUNICATION SYSTEM AND VEHICLE WITH SUCH A RECEIVER |
EP1976109A1 (en) * | 2007-03-31 | 2008-10-01 | Sony Deutschland Gmbh | Demodulator, method and receiver for demodulation |
US8135093B2 (en) * | 2007-04-18 | 2012-03-13 | Industrial Technology Research Institute | Carrier frequency offset estimation method and system |
JP4916962B2 (en) * | 2007-06-26 | 2012-04-18 | 日本電波工業株式会社 | Signal processor and radio |
US8315298B2 (en) * | 2007-10-31 | 2012-11-20 | Agere Systems Inc. | Method and apparatus for rate-dependent equalization |
US8514916B2 (en) * | 2008-06-06 | 2013-08-20 | Viasat, Inc. | Connecting cable length detector |
US8964653B2 (en) * | 2008-07-11 | 2015-02-24 | Qualcomm Incorporated | Peer-to-peer device identification and cognitive communication |
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Citations (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3949404A (en) | 1974-12-19 | 1976-04-06 | Nasa | Highly efficient antenna system using a corrugated horn and scanning hyperbolic reflector |
US4232197A (en) | 1978-08-25 | 1980-11-04 | Bell Telephone Laboratories, Incorporated | Processor for a TDMA burst modem |
US4495619A (en) | 1981-10-23 | 1985-01-22 | At&T Bell Laboratories | Transmitter and receivers using resource sharing and coding for increased capacity |
US4575857A (en) | 1983-05-17 | 1986-03-11 | Kabushiki Kaisha Toshiba | Adaptive equalizer with variable tap coefficient leakage |
US4599732A (en) | 1984-04-17 | 1986-07-08 | Harris Corporation | Technique for acquiring timing and frequency synchronization for modem utilizing known (non-data) symbols as part of their normal transmitted data format |
US4775988A (en) | 1985-08-28 | 1988-10-04 | International Business Machines Corporation | Method for rapid gain acquisition in a modem receiver |
US4849996A (en) | 1988-03-10 | 1989-07-18 | Ncr Corporation | Phase perturbation compensation system |
US4849989A (en) | 1988-01-13 | 1989-07-18 | Ncr Corporation | Data modem receiver |
US5297144A (en) | 1991-01-22 | 1994-03-22 | Spectrix Corporation | Reservation-based polling protocol for a wireless data communications network |
US5420851A (en) | 1993-11-24 | 1995-05-30 | At&T Corp. | Method of multiple access |
US5444698A (en) | 1993-07-21 | 1995-08-22 | Nec Corporation | Mobile radio communication system capable of preventing interference between time slots when propagation delay exists |
US5487181A (en) | 1992-10-28 | 1996-01-23 | Ericsson Ge Mobile Communications Inc. | Low power architecture for portable and mobile two-way radios |
US5511082A (en) | 1994-05-10 | 1996-04-23 | General Instrument Corporation Of Delaware | Punctured convolutional encoder |
US5566210A (en) | 1993-11-29 | 1996-10-15 | Matsushita Electric Industrial Co., Ltd. | Data receiving apparatus |
US5615212A (en) | 1995-09-11 | 1997-03-25 | Motorola Inc. | Method, device and router for providing a contention-based reservation mechanism within a mini-slotted dynamic entry polling slot supporting multiple service classes |
US5638374A (en) | 1995-03-15 | 1997-06-10 | Hughes Electronics | Enhanced transaction reservation |
US5638371A (en) | 1995-06-27 | 1997-06-10 | Nec Usa, Inc. | Multiservices medium access control protocol for wireless ATM system |
US5675573A (en) | 1995-03-22 | 1997-10-07 | Lucent Technologies Inc. | Delay-minimizing system with guaranteed bandwidth delivery for real-time traffic |
US5751708A (en) | 1995-10-25 | 1998-05-12 | Lucent Technologies Inc. | Access method for broadband and narrowband networks |
US5768254A (en) | 1995-09-29 | 1998-06-16 | Lucent Technologies Inc. | Multiple access cellular communication with signal cancellation to reduce co-channel interference |
US5828695A (en) | 1991-06-03 | 1998-10-27 | British Telecommunications Public Limited Company | QAM system in which the constellation is modified in accordance with channel quality |
US5859619A (en) | 1996-10-22 | 1999-01-12 | Trw Inc. | Small volume dual offset reflector antenna |
US5890055A (en) | 1995-07-28 | 1999-03-30 | Lucent Technologies Inc. | Method and system for connecting cells and microcells in a wireless communications network |
US6002713A (en) | 1997-10-22 | 1999-12-14 | Pc Tel, Inc. | PCM modem equalizer with adaptive compensation for robbed bit signalling |
US6006069A (en) | 1994-11-28 | 1999-12-21 | Bosch Telecom Gmbh | Point-to-multipoint communications system |
US6016311A (en) | 1997-11-19 | 2000-01-18 | Ensemble Communications, Inc. | Adaptive time division duplexing method and apparatus for dynamic bandwidth allocation within a wireless communication system |
US6016313A (en) | 1996-11-07 | 2000-01-18 | Wavtrace, Inc. | System and method for broadband millimeter wave data communication |
US6038455A (en) | 1995-09-25 | 2000-03-14 | Cirrus Logic, Inc. | Reverse channel reuse scheme in a time shared cellular communication system |
US6075808A (en) | 1995-03-22 | 2000-06-13 | Nec Corporation | Spread spectrum time diversity communications system |
US6094421A (en) | 1995-06-05 | 2000-07-25 | Omnipoint Corporation | Timing adjustment control for efficient time division duplex, frequency division duplex or hybrid time division duplex/frequency division duplex communication |
US6112080A (en) | 1993-11-01 | 2000-08-29 | Omnipoint Corporation | Wireless communication method and system |
US6263077B1 (en) | 1997-10-03 | 2001-07-17 | Conexant Systems, Inc. | Digital subscriber line modem utilizing echo cancellation to reduce near-end cross-talk noise |
US20020126748A1 (en) | 2001-01-17 | 2002-09-12 | Rafie Manouchehr S. | Carrier phase recovery system for adaptive burst modems and link hopping radio networks |
US6836515B1 (en) * | 1998-07-24 | 2004-12-28 | Hughes Electronics Corporation | Multi-modulation radio communications |
-
2001
- 2001-03-05 US US09/800,268 patent/US6597733B2/en not_active Ceased
-
2002
- 2002-03-05 WO PCT/US2002/006879 patent/WO2002071608A1/en not_active Application Discontinuation
-
2005
- 2005-07-20 US US11/187,034 patent/USRE42021E1/en not_active Expired - Lifetime
Patent Citations (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3949404A (en) | 1974-12-19 | 1976-04-06 | Nasa | Highly efficient antenna system using a corrugated horn and scanning hyperbolic reflector |
US4232197A (en) | 1978-08-25 | 1980-11-04 | Bell Telephone Laboratories, Incorporated | Processor for a TDMA burst modem |
US4495619A (en) | 1981-10-23 | 1985-01-22 | At&T Bell Laboratories | Transmitter and receivers using resource sharing and coding for increased capacity |
US4575857A (en) | 1983-05-17 | 1986-03-11 | Kabushiki Kaisha Toshiba | Adaptive equalizer with variable tap coefficient leakage |
US4599732A (en) | 1984-04-17 | 1986-07-08 | Harris Corporation | Technique for acquiring timing and frequency synchronization for modem utilizing known (non-data) symbols as part of their normal transmitted data format |
US4775988A (en) | 1985-08-28 | 1988-10-04 | International Business Machines Corporation | Method for rapid gain acquisition in a modem receiver |
US4849989A (en) | 1988-01-13 | 1989-07-18 | Ncr Corporation | Data modem receiver |
US4849996A (en) | 1988-03-10 | 1989-07-18 | Ncr Corporation | Phase perturbation compensation system |
US5297144A (en) | 1991-01-22 | 1994-03-22 | Spectrix Corporation | Reservation-based polling protocol for a wireless data communications network |
US5828695A (en) | 1991-06-03 | 1998-10-27 | British Telecommunications Public Limited Company | QAM system in which the constellation is modified in accordance with channel quality |
US5487181A (en) | 1992-10-28 | 1996-01-23 | Ericsson Ge Mobile Communications Inc. | Low power architecture for portable and mobile two-way radios |
US5444698A (en) | 1993-07-21 | 1995-08-22 | Nec Corporation | Mobile radio communication system capable of preventing interference between time slots when propagation delay exists |
US6112080A (en) | 1993-11-01 | 2000-08-29 | Omnipoint Corporation | Wireless communication method and system |
US5420851A (en) | 1993-11-24 | 1995-05-30 | At&T Corp. | Method of multiple access |
US5566210A (en) | 1993-11-29 | 1996-10-15 | Matsushita Electric Industrial Co., Ltd. | Data receiving apparatus |
US5511082A (en) | 1994-05-10 | 1996-04-23 | General Instrument Corporation Of Delaware | Punctured convolutional encoder |
US6006069A (en) | 1994-11-28 | 1999-12-21 | Bosch Telecom Gmbh | Point-to-multipoint communications system |
US5638374A (en) | 1995-03-15 | 1997-06-10 | Hughes Electronics | Enhanced transaction reservation |
US5675573A (en) | 1995-03-22 | 1997-10-07 | Lucent Technologies Inc. | Delay-minimizing system with guaranteed bandwidth delivery for real-time traffic |
US6075808A (en) | 1995-03-22 | 2000-06-13 | Nec Corporation | Spread spectrum time diversity communications system |
US6094421A (en) | 1995-06-05 | 2000-07-25 | Omnipoint Corporation | Timing adjustment control for efficient time division duplex, frequency division duplex or hybrid time division duplex/frequency division duplex communication |
US5638371A (en) | 1995-06-27 | 1997-06-10 | Nec Usa, Inc. | Multiservices medium access control protocol for wireless ATM system |
US5890055A (en) | 1995-07-28 | 1999-03-30 | Lucent Technologies Inc. | Method and system for connecting cells and microcells in a wireless communications network |
US5615212A (en) | 1995-09-11 | 1997-03-25 | Motorola Inc. | Method, device and router for providing a contention-based reservation mechanism within a mini-slotted dynamic entry polling slot supporting multiple service classes |
US6038455A (en) | 1995-09-25 | 2000-03-14 | Cirrus Logic, Inc. | Reverse channel reuse scheme in a time shared cellular communication system |
US5768254A (en) | 1995-09-29 | 1998-06-16 | Lucent Technologies Inc. | Multiple access cellular communication with signal cancellation to reduce co-channel interference |
US5751708A (en) | 1995-10-25 | 1998-05-12 | Lucent Technologies Inc. | Access method for broadband and narrowband networks |
US5859619A (en) | 1996-10-22 | 1999-01-12 | Trw Inc. | Small volume dual offset reflector antenna |
US6016313A (en) | 1996-11-07 | 2000-01-18 | Wavtrace, Inc. | System and method for broadband millimeter wave data communication |
US6263077B1 (en) | 1997-10-03 | 2001-07-17 | Conexant Systems, Inc. | Digital subscriber line modem utilizing echo cancellation to reduce near-end cross-talk noise |
US6002713A (en) | 1997-10-22 | 1999-12-14 | Pc Tel, Inc. | PCM modem equalizer with adaptive compensation for robbed bit signalling |
US6016311A (en) | 1997-11-19 | 2000-01-18 | Ensemble Communications, Inc. | Adaptive time division duplexing method and apparatus for dynamic bandwidth allocation within a wireless communication system |
US6836515B1 (en) * | 1998-07-24 | 2004-12-28 | Hughes Electronics Corporation | Multi-modulation radio communications |
US20020126748A1 (en) | 2001-01-17 | 2002-09-12 | Rafie Manouchehr S. | Carrier phase recovery system for adaptive burst modems and link hopping radio networks |
Non-Patent Citations (13)
Title |
---|
"Asynchronous Transfer Mode (ATM) Technical Overview", 2nd Edition, Prentice Hall, Oct. 1995, Chapter 3. pp. 21-25. |
C.E. Shannon, "A Mathemetical Theory of Communication," Bell System Technical Journal, pp. 379-423 (Part 1), 623-656 (Part II), Jul., Oct. 1948. |
International Preliminary Examination Report, mailed Mar. 21, 2003 for application PCT/US02/06879. |
International Search Report, mailed Jul. 24, 2002 for application PCT/US02/06879. |
L.H. Charles Lee, "Convolutional Coding: Fundamentals and Applications," Artech House, Inc., 1997, pp. 11-51. |
Lin., et al., "Error Control Coding, Fundamentals and Applications," Prentice-Hall Computer Applications in Electrical Engineering Series., 1993, pp. 315-349. |
Notice of Allowability, mailed Mar. 4, 2003 for U.S. Appl. No. 09/800,268. |
Office Action, mailed Dec. 19, 2002 for U.S. Appl. No. 09/800,268. |
Office Action, mailed Jun. 28, 2002 for U.S. Appl. No. 09/800,268. |
Redl, et al., "An Introductionto GSM," Artech House, Inc., 1995, pp. 84, 85 and 95. |
Ulm., et al., "Data-Over-Cable Interface Specifications, Radio Freqency Interface Specification," Hewlett Packard Interim Specification, Doc. Control No.: SP-RFII01-970321, published Mar. 21, 1997 by MCNS Holdings, L.P., Section 6, pp. 43-85. |
Wolf, et al. On the Weight Distribution of Linear Block codes Formed From Convolutional Codes, IEEE Transactions on Communications, vol. 44:9, Sep. 1996. |
Written Opinion, mailed Dec. 9, 2002 for application PCT/US02/06879. |
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WO2002071608A1 (en) | 2002-09-12 |
US6597733B2 (en) | 2003-07-22 |
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