WO2001045278A3 - Multibit spread spectrum signalling - Google Patents

Multibit spread spectrum signalling Download PDF

Info

Publication number
WO2001045278A3
WO2001045278A3 PCT/EP2000/012393 EP0012393W WO0145278A3 WO 2001045278 A3 WO2001045278 A3 WO 2001045278A3 EP 0012393 W EP0012393 W EP 0012393W WO 0145278 A3 WO0145278 A3 WO 0145278A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
bit rate
output
spread spectrum
detected
Prior art date
Application number
PCT/EP2000/012393
Other languages
French (fr)
Other versions
WO2001045278A2 (en
Inventor
Kenneth R Whight
Original Assignee
Koninkl Philips Electronics Nv
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Priority to JP2001545449A priority Critical patent/JP2003517241A/en
Priority to EP00990678A priority patent/EP1219040A2/en
Priority to KR1020017010400A priority patent/KR20010102190A/en
Publication of WO2001045278A2 publication Critical patent/WO2001045278A2/en
Publication of WO2001045278A3 publication Critical patent/WO2001045278A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J99/00—Subject matter not provided for in other groups of this subclass
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0077—Multicode, e.g. multiple codes assigned to one user

Abstract

A method of transmitting and receiving a spread spectrum signal, wherein a product of a lower bit rate signal and a second PN-code equals the bit rate of of a higher bit rate signal, and wherein a first PN-code sequence is used to spread said product or a higher bit rate signal to a predetermined output chip rate signal which is transmitted. At a receiver the spread spectrum signal is received and demodulated and in a first operation the demodulated signal is correlated with the first PN-code sequence (48) and in a second operation the output (56) from the first mentioned correlating step (42) is correlated with the second PN-code sequence (62). If a strong correlation peak is detected in the output of the first operation and no correlation peak is detected in the output of the second operation it is treated as a higher bit rate (LBR) signal but if at least a weak correlation peak is detected in the output of the first operation and a strong correlation peak is detected in the output of the second operation it is treated as a lower bit rate (LBR) signal.
PCT/EP2000/012393 1999-12-17 2000-12-05 Multibit spread spectrum signalling WO2001045278A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2001545449A JP2003517241A (en) 1999-12-17 2000-12-05 Multi-bit spread spectrum signaling
EP00990678A EP1219040A2 (en) 1999-12-17 2000-12-05 Multibit spread spectrum signalling
KR1020017010400A KR20010102190A (en) 1999-12-17 2000-12-05 Multibit spread spectrum signalling

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9930004.8 1999-12-17
GBGB9930004.8A GB9930004D0 (en) 1999-12-17 1999-12-17 Multibit spread spectrum signalling

Publications (2)

Publication Number Publication Date
WO2001045278A2 WO2001045278A2 (en) 2001-06-21
WO2001045278A3 true WO2001045278A3 (en) 2002-05-02

Family

ID=10866616

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/012393 WO2001045278A2 (en) 1999-12-17 2000-12-05 Multibit spread spectrum signalling

Country Status (7)

Country Link
US (1) US7103089B2 (en)
EP (1) EP1219040A2 (en)
JP (1) JP2003517241A (en)
KR (1) KR20010102190A (en)
CN (1) CN1369143A (en)
GB (1) GB9930004D0 (en)
WO (1) WO2001045278A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020168972A1 (en) * 2001-05-11 2002-11-14 Justiss James E. Antenna feedforward interference cancellation system
DE10155179B4 (en) * 2001-11-12 2006-11-23 Andrew Wireless Systems Gmbh Digital repeater with bandpass filtering, adaptive pre-equalization and suppression of self-oscillation
US7313122B2 (en) * 2002-07-10 2007-12-25 Broadcom Corporation Multi-user carrier frequency offset correction for CDMA systems
EP1597839B1 (en) * 2003-02-26 2007-08-15 Andrew Corporation Cellular signal enhancer
WO2004079922A2 (en) * 2003-02-26 2004-09-16 Ems Technologies, Inc. Cellular signal enhancer
CN101969649B (en) * 2003-02-26 2013-01-02 安德鲁有限责任公司 Honeycomb signal enhancer
US7430397B2 (en) * 2003-12-05 2008-09-30 Ntt Docomo, Inc. Radio repeater and radio relay transmission method
CA2568422C (en) * 2004-05-26 2013-07-23 Wireless Extenders, Inc. Wireless repeater implementing low-level oscillation detection and protection for a duplex communication system
US7386308B2 (en) * 2005-01-05 2008-06-10 Ernest Mann In-building radio frequency communications system with automatic failover recovery
KR100844828B1 (en) * 2006-11-24 2008-07-08 주식회사알에프윈도우 Radio Frequency Repeater for cancelling feedback interference signal with built in antenna
WO2010006645A1 (en) * 2008-07-16 2010-01-21 Telefonaktiebolaget Lm Ericsson (Publ) Base and repeater stations
CN103472468B (en) * 2012-06-06 2016-07-06 泰斗微电子科技有限公司 A kind of pseudo code phase pipeline searching method in GNSS satellite signal capture
HUE062471T2 (en) * 2017-02-24 2023-11-28 Neosat Gmbh Orthogonal correlation signals for detection and synchronization at low snr
US10879995B2 (en) 2018-04-10 2020-12-29 Wilson Electronics, Llc Feedback cancellation on multiband booster
CN110113280B (en) * 2019-04-12 2021-11-23 杭州电子科技大学 Anti-frequency-offset GMSK demodulation synchronization method in burst communication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997021294A2 (en) * 1995-12-04 1997-06-12 Aironet Wireless Communications, Inc. Cellular communication system with dynamically modified data transmission parameters
US5706428A (en) * 1996-03-14 1998-01-06 Lucent Technologies Inc. Multirate wireless data communication system
WO1999003225A1 (en) * 1997-07-11 1999-01-21 Telefonaktiebolaget Lm Ericsson (Publ) Rate detection for variable rate cdma communication system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2209648B (en) * 1987-09-10 1991-10-23 Ncr Co Modem communication system having main and secondary channels
FI961143A (en) * 1996-03-12 1997-09-13 Nokia Mobile Phones Ltd Method and circuitry for processing received signals in a communication system
JP3981899B2 (en) * 1998-02-26 2007-09-26 ソニー株式会社 Transmission method, transmission device, and reception device
JP3427971B2 (en) * 1998-08-24 2003-07-22 ソニー株式会社 Communication control method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997021294A2 (en) * 1995-12-04 1997-06-12 Aironet Wireless Communications, Inc. Cellular communication system with dynamically modified data transmission parameters
US5706428A (en) * 1996-03-14 1998-01-06 Lucent Technologies Inc. Multirate wireless data communication system
WO1999003225A1 (en) * 1997-07-11 1999-01-21 Telefonaktiebolaget Lm Ericsson (Publ) Rate detection for variable rate cdma communication system

Also Published As

Publication number Publication date
WO2001045278A2 (en) 2001-06-21
GB9930004D0 (en) 2000-02-09
KR20010102190A (en) 2001-11-15
EP1219040A2 (en) 2002-07-03
US7103089B2 (en) 2006-09-05
US20010038670A1 (en) 2001-11-08
JP2003517241A (en) 2003-05-20
CN1369143A (en) 2002-09-11

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