BR9904620A - Receptor de espectro amplo e método para receber um sinal de espectro amplo - Google Patents

Receptor de espectro amplo e método para receber um sinal de espectro amplo

Info

Publication number
BR9904620A
BR9904620A BR9904620A BR9904620A BR9904620A BR 9904620 A BR9904620 A BR 9904620A BR 9904620 A BR9904620 A BR 9904620A BR 9904620 A BR9904620 A BR 9904620A BR 9904620 A BR9904620 A BR 9904620A
Authority
BR
Brazil
Prior art keywords
collector
signal
synchronism
taps
broad
Prior art date
Application number
BR9904620A
Other languages
English (en)
Inventor
Tetsuya Miura
Original Assignee
Nec Corp
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
Priority to JP25982298A priority Critical patent/JP3031350B2/ja
Application filed by Nec Corp filed Critical Nec Corp
Publication of BR9904620A publication Critical patent/BR9904620A/pt

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7073Synchronisation aspects
    • H04B1/7075Synchronisation aspects with code phase acquisition
    • H04B1/70754Setting of search window, i.e. range of code offsets to be searched
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7097Interference-related aspects
    • H04B1/711Interference-related aspects the interference being multi-path interference
    • H04B1/7115Constructive combining of multi-path signals, i.e. RAKE receivers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7097Interference-related aspects
    • H04B1/711Interference-related aspects the interference being multi-path interference
    • H04B1/7115Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2201/00Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70707Efficiency-related aspects
    • H04B2201/70709Efficiency-related aspects with discontinuous detection

Abstract

"RECEPTOR DE ESPECTRO AMPLO E MéTODO PARA RECEBER UM SINAL DE ESPECTRO AMPLO". Um receptor de espectro amplo inclui um certo número de derivações de coletor para receber um sinal de espectro amplo. Cada derivação de coletor comprime o sinal de espectro amplo por meio de um código de compressão. Um combinador coletor combina os sinais de saída das derivações de coletor. Um conjunto de circuitos de controle ajusta os códigos de compressão de uma primeira seq³ência de bits para as derivações de coletor nos respectivos deslocamentos de sincronismo de valores incrementais de modo que haja diferença de um intervalo de divisão entre sucessivas derivações de coletor. O conjunto de circuitos de controle então sucessivamente varia os deslocamentos de sincronismo na busca de um sinal de processar chamada. Respondendo a um sinal de saída do combinador coletor, indicando que o sinal de processar chamada foi recebido, o conjunto de circuitos de controle determina seu deslocamento de sincronismo em relação à referência, e ajusta os códigos de compressão de uma segunda seq³ência de bits para as derivações de coletor nos respectivos deslocamentos de sincronismo de valores incrementais, com base no deslocamento de sincronismo determinado, para receber um sinal de informação. Se o receptor perder a faixa do sincronismo correto do sinal de informação, o conjunto de circuitos de controle sucessivamente varia os respectivos deslocamentos de sincronismo das derivações de coletor em busca do sinal perdido.
BR9904620A 1998-09-14 1999-09-14 Receptor de espectro amplo e método para receber um sinal de espectro amplo BR9904620A (pt)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25982298A JP3031350B2 (ja) 1998-09-14 1998-09-14 スペクトラム拡散復調装置および方法

Publications (1)

Publication Number Publication Date
BR9904620A true BR9904620A (pt) 2000-09-26

Family

ID=17339485

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9904620A BR9904620A (pt) 1998-09-14 1999-09-14 Receptor de espectro amplo e método para receber um sinal de espectro amplo

Country Status (6)

Country Link
US (1) US6658046B1 (pt)
EP (1) EP0987828A3 (pt)
JP (1) JP3031350B2 (pt)
KR (1) KR100307888B1 (pt)
CN (1) CN1248825A (pt)
BR (1) BR9904620A (pt)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7769078B2 (en) * 2000-12-22 2010-08-03 Telefonaktiebolaget Lm Ericsson (Publ) Apparatus, methods and computer program products for delay selection in a spread-spectrum receiver
US6922434B2 (en) * 1999-10-19 2005-07-26 Ericsson Inc. Apparatus and methods for finger delay selection in RAKE receivers
KR100416973B1 (ko) * 1999-12-31 2004-02-05 삼성전자주식회사 멀티캐리어 통신시스템의 순방향 전력제어 장치 및 방법
JP3519338B2 (ja) * 2000-03-24 2004-04-12 松下電器産業株式会社 受信装置及び利得制御方法
EP1146657A1 (en) * 2000-04-11 2001-10-17 Siemens Aktiengesellschaft Mobile station and method for allocating rake fingers
SE0003289D0 (sv) * 2000-05-18 2000-09-15 Ericsson Telefon Ab L M Radio receiver and channel estimator
JP2001345739A (ja) * 2000-06-06 2001-12-14 Nec Corp Rake受信装置
JP3730842B2 (ja) * 2000-08-02 2006-01-05 日本電気株式会社 Cdma受信装置及びその方法
JP3428637B2 (ja) * 2000-11-27 2003-07-22 日本電気株式会社 Cdma受信機のマルチパス検出方法および回路
DE10130686A1 (de) * 2001-06-26 2003-01-02 Rohde & Schwarz Signalgenerator für ein DSSS- oder CDMA-Signal
JP2003023371A (ja) * 2001-07-06 2003-01-24 Nec Corp Cdma受信機、その受信方法及びプログラム
US7433389B2 (en) * 2001-11-20 2008-10-07 Mediatek Inc. Methods and apparatus for spread spectrum signal processing using a reconfigurable coprocessor
KR100851230B1 (ko) * 2002-06-05 2008-08-07 에스케이 텔레콤주식회사 핑거 할당용 신호 탐색 방법
WO2004047310A2 (en) * 2002-11-15 2004-06-03 Time Domain Corporation A system and method for processing signals in uwb communications
US7587211B2 (en) * 2005-12-21 2009-09-08 Broadcom Corporation Method and system for adaptive multi rate (AMR) and measurements downlink adaptation

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0388526A (en) 1989-08-31 1991-04-12 Nec Eng Ltd Spectrum diffusion demodulating device
US5109390A (en) 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
JPH0477022A (en) 1990-07-16 1992-03-11 Ricoh Co Ltd Receiver for spread spectrum communication system
CA2146445C (en) * 1993-08-06 1999-06-01 Fumiyuki Adachi Receiver and repeater for spread-spectrum communications
US5671221A (en) * 1995-06-14 1997-09-23 Sharp Microelectronics Technology, Inc. Receiving method and apparatus for use in a spread-spectrum communication system
FI100494B (fi) * 1995-11-20 1997-12-15 Nokia Telecommunications Oy Menetelmä vastaanottimen ohjaamiseksi ja vastaanotin
JPH1022871A (ja) 1996-07-01 1998-01-23 Oki Electric Ind Co Ltd レイク受信回路
US6107959A (en) * 1996-09-30 2000-08-22 Qualcomm Incorporated Positioning determination using one low-Earth orbit satellite
JPH10145326A (ja) 1996-11-14 1998-05-29 Fujitsu Ltd Cdmaシステム用受信装置
JP2924864B2 (ja) 1997-06-16 1999-07-26 日本電気株式会社 適応レイク受信方式
US5926503A (en) * 1997-08-27 1999-07-20 Motorola, Inc. DS-CDMA receiver and forward link diversity method

Also Published As

Publication number Publication date
EP0987828A3 (en) 2004-02-04
JP3031350B2 (ja) 2000-04-10
US6658046B1 (en) 2003-12-02
CN1248825A (zh) 2000-03-29
KR20000028664A (ko) 2000-05-25
KR100307888B1 (ko) 2001-11-07
JP2000091953A (ja) 2000-03-31
EP0987828A2 (en) 2000-03-22

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Legal Events

Date Code Title Description
B08F Application fees: dismissal - article 86 of industrial property law

Free format text: REFERENTE 10A. ANUIDADE.

B08K Lapse as no evidence of payment of the annual fee has been furnished to inpi (acc. art. 87)

Free format text: REFERENTE AO DESPACHO 8.6 DA RPI 2047 DE 30/03/2010.

B15K Others concerning applications: alteration of classification

Ipc: H04B 1/7075 (2011.01), H04B 1/7115 (2011.0