BR9813026A - Espalhamento de código pn em múltiplas camadas em um sistema de comunicações de múltiplos usuários - Google Patents
Espalhamento de código pn em múltiplas camadas em um sistema de comunicações de múltiplos usuáriosInfo
- Publication number
- BR9813026A BR9813026A BR9813026-9A BR9813026A BR9813026A BR 9813026 A BR9813026 A BR 9813026A BR 9813026 A BR9813026 A BR 9813026A BR 9813026 A BR9813026 A BR 9813026A
- Authority
- BR
- Brazil
- Prior art keywords
- code
- spreading
- period
- information signals
- communications system
- Prior art date
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
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
- H04B1/7077—Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/58—Random or pseudo-random number generators
- G06F7/582—Pseudo-random number generators
- G06F7/584—Pseudo-random number generators using finite field arithmetic, e.g. using a linear feedback shift register
-
- 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
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/204—Multiple access
- H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
-
- 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
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
- H04B1/70755—Setting of lock conditions, e.g. threshold
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70716—Quadrature
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Communication Control (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
Patente de Invenção: ESPALHAMENTO DE CóDIGO PN EM MúLTIPLAS CAMADAS EM UM SISTEMA DE COMUNICAçõES DE MúLTIPLOS USUáRIOS. é descrita uma técnica para o espalhamento de sinais de informações em um sistema de comunicação de espectro espalhado para prover maior velocidade de aquisição ou captação do sinal. Um primeiro código de espalhamento PN ou conjunto de código é usado para espalhar os sinais de informações juntamente com uma segunda seq³ência ou função de código de espalhamento PN. O segundo código PN é sincronizado com o primeiro código de espalhamento PN, porém possui um período de código maior de forma a que cada chip de código do segundo código PN se estende por sobre todo o período do primeiro código PN. O código de espalhamento de período mais longo forma um código externo que auxilia ao provimento de uma identificação não ambígua do facho e uma fácil temporização ou timing na presença de retardo dinamicamente mutável na trajetória do sinal, melhorando a aquisição do sinal.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US6169897P | 1997-10-10 | 1997-10-10 | |
PCT/US1998/021466 WO1999019992A1 (en) | 1997-10-10 | 1998-10-09 | Multi-layered pn code spreading in a multi-user communications system |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9813026A true BR9813026A (pt) | 2000-08-15 |
Family
ID=22037524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9813026-9A BR9813026A (pt) | 1997-10-10 | 1998-10-09 | Espalhamento de código pn em múltiplas camadas em um sistema de comunicações de múltiplos usuários |
Country Status (13)
Country | Link |
---|---|
US (1) | US6493376B1 (pt) |
EP (1) | EP1029398B1 (pt) |
JP (1) | JP4386574B2 (pt) |
KR (1) | KR100693682B1 (pt) |
CN (2) | CN100590988C (pt) |
AT (1) | ATE450084T1 (pt) |
AU (1) | AU754257B2 (pt) |
BR (1) | BR9813026A (pt) |
CA (1) | CA2305718C (pt) |
DE (1) | DE69841326D1 (pt) |
NO (1) | NO318825B1 (pt) |
RU (1) | RU2221337C2 (pt) |
WO (1) | WO1999019992A1 (pt) |
Families Citing this family (71)
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JP3695732B2 (ja) * | 1998-09-02 | 2005-09-14 | 富士通株式会社 | Cdma受信装置のサーチ装置 |
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EP1085689B1 (fr) * | 1999-09-13 | 2003-05-21 | Mitsubishi Electric Information Technology Centre Europe B.V. | Attribution de séquences d'étalement dans un système multiporteur d'accès multiple par répartion de codes (MCCDMA) |
US6704322B1 (en) * | 1999-11-17 | 2004-03-09 | National Science Council | Smart different prime code multiplexing system |
US6324210B1 (en) * | 1999-12-17 | 2001-11-27 | Golden Bridge Technology Incorporated | Sliding matched filter with flexible hardware complexity |
DE60019469T2 (de) * | 2000-03-23 | 2006-01-26 | Interdigital Technology Corp., Wilmington | Effizienter spreizer für spreizspektrum-übertragungssysteme |
JP3805205B2 (ja) * | 2000-04-06 | 2006-08-02 | 株式会社エヌ・ティ・ティ・ドコモ | Cdmaセルラ方式における通信品質測定方法およびその装置 |
JP4846956B2 (ja) | 2000-04-07 | 2011-12-28 | インターデイジタル テクノロジー コーポレーション | 無線通信方式における基地局同期化方式 |
US7426386B1 (en) * | 2000-06-21 | 2008-09-16 | Northrop Grumman Corporation | Beam laydown for hopped satellite downlink with adaptable duty cycle |
US7911993B2 (en) | 2000-07-19 | 2011-03-22 | Ipr Licensing, Inc. | Method and apparatus for allowing soft handoff of a CDMA reverse link utilizing an orthogonal channel structure |
US8537656B2 (en) | 2000-07-19 | 2013-09-17 | Ipr Licensing, Inc. | Method for compensating for multi-path of a CDMA reverse link utilizing an orthogonal channel structure |
US7180873B1 (en) * | 2000-10-06 | 2007-02-20 | Globalstar, Inc. | Spread spectrum code division destination access (SS-CDDA) for satellite communication system with distributed gateways |
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US6826244B2 (en) | 2001-02-27 | 2004-11-30 | Interdigital Technology Corporation | Initial cell search algorithm for 3G FDD wireless communication systems |
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US6917581B2 (en) | 2001-07-17 | 2005-07-12 | Ipr Licensing, Inc. | Use of orthogonal or near orthogonal codes in reverse link |
US20030067961A1 (en) * | 2001-10-04 | 2003-04-10 | Hudson John E. | Wireless spread spectrum communications system, communications apparatus and method therefor |
US7321576B2 (en) * | 2001-11-15 | 2008-01-22 | Nokia Corporation | Method for compact representation of multi-code signaling in communication systems |
US7813311B2 (en) | 2002-02-05 | 2010-10-12 | Interdigital Technology Corporation | Method and apparatus for synchronizing base stations |
JP3860762B2 (ja) * | 2002-02-14 | 2006-12-20 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信システム、チャネル同期確立方法、及び移動局 |
US6823033B2 (en) * | 2002-03-12 | 2004-11-23 | Qualcomm Inc. | ΣΔdelta modulator controlled phase locked loop with a noise shaped dither |
US7197276B2 (en) * | 2002-03-15 | 2007-03-27 | Broadcom Corporation | Downstream adaptive modulation in broadband communications systems |
US7995926B2 (en) * | 2003-02-21 | 2011-08-09 | Northrop Grumman Systems Corporation | Scanned acquisition using pre-track data |
US7738536B2 (en) * | 2003-04-15 | 2010-06-15 | Novatel Inc. | Apparatus for and method of making pulse-shape measurements |
US7092426B2 (en) * | 2003-09-24 | 2006-08-15 | S5 Wireless, Inc. | Matched filter for scalable spread spectrum communications systems |
US7006840B2 (en) * | 2003-09-30 | 2006-02-28 | Interdigital Technology Corporation | Efficient frame tracking in mobile receivers |
US7447254B1 (en) * | 2004-03-25 | 2008-11-04 | Cypress Semiconductor Corp. | Self-correlating pseudo-noise pairing |
US7310064B2 (en) * | 2004-04-29 | 2007-12-18 | Novariant Inc. | Rebroadcasting method and system for navigation signals |
US7522653B2 (en) * | 2005-01-27 | 2009-04-21 | L-3 Communications, Corp. | System and method for PN correlation and symbol synchronization |
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US7492810B2 (en) * | 2005-04-04 | 2009-02-17 | General Electric Company | Method and apparatus for segmented code correlation |
EP1899742B1 (en) * | 2005-07-01 | 2009-08-26 | European Space Agency | Spreading codes for a satellite navigation system |
US7738537B2 (en) * | 2005-09-14 | 2010-06-15 | Novatel Inc. | Apparatus for and method of determining quadrature code timing from pulse-shape measurements made using an in-phase code |
US7668228B2 (en) | 2005-09-16 | 2010-02-23 | Novatel Inc. | Apparatus for and method of correlating to rising chip edges |
US7796694B1 (en) | 2005-11-04 | 2010-09-14 | Cypress Semiconductor Corporation | Circuit and method or encoding DSSS signals |
US7756194B1 (en) | 2005-11-04 | 2010-07-13 | Cypress Semiconductor Corporation | Circuit and method for decoding code phase modulated signals |
US7792225B2 (en) * | 2005-11-30 | 2010-09-07 | Qualcomm Incorporated | Method and device for reducing cross-correlation false alarms in CDMA and other wireless networks |
US7688878B2 (en) * | 2006-03-16 | 2010-03-30 | The Boeing Company | Method and device of peak detection in preamble synchronization for direct sequence spread spectrum communication |
EP1838009B1 (en) * | 2006-03-24 | 2008-10-08 | Via Technologies, Inc. | Spread spectrum receiver and channel compensation method thereof |
US7991040B2 (en) * | 2006-04-04 | 2011-08-02 | Qualcomm Incorporated | Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal |
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CN101247141B (zh) * | 2007-12-05 | 2011-07-06 | 电子科技大学 | 一种跳频信号时差估计方法 |
US20090239550A1 (en) | 2008-03-18 | 2009-09-24 | Myers Theodore J | Random phase multiple access system with location tracking |
US8477830B2 (en) | 2008-03-18 | 2013-07-02 | On-Ramp Wireless, Inc. | Light monitoring system using a random phase multiple access system |
US20100195553A1 (en) | 2008-03-18 | 2010-08-05 | Myers Theodore J | Controlling power in a spread spectrum system |
US8958460B2 (en) | 2008-03-18 | 2015-02-17 | On-Ramp Wireless, Inc. | Forward error correction media access control system |
US7526013B1 (en) | 2008-03-18 | 2009-04-28 | On-Ramp Wireless, Inc. | Tag communications with access point |
US7773664B2 (en) | 2008-03-18 | 2010-08-10 | On-Ramp Wireless, Inc. | Random phase multiple access system with meshing |
US8520721B2 (en) | 2008-03-18 | 2013-08-27 | On-Ramp Wireless, Inc. | RSSI measurement mechanism in the presence of pulsed jammers |
US7733945B2 (en) | 2008-03-18 | 2010-06-08 | On-Ramp Wireless, Inc. | Spread spectrum with doppler optimization |
US8363699B2 (en) | 2009-03-20 | 2013-01-29 | On-Ramp Wireless, Inc. | Random timing offset determination |
US8699636B2 (en) * | 2009-08-07 | 2014-04-15 | Ben Wild | Long range radio frequency identification system |
US8406423B2 (en) * | 2010-03-16 | 2013-03-26 | Telcordia Technologies, Inc. | Multi-bit cryptographically secure encryptor for M-ary spectral phase encoder optical code division multiple access |
US9367718B2 (en) | 2012-10-22 | 2016-06-14 | Iotera, Inc. | Methods for enabling low-power RFID communication |
US9065483B2 (en) * | 2013-01-21 | 2015-06-23 | Micron Technology, Inc. | Determining soft data using a classification code |
TWI651009B (zh) * | 2014-02-26 | 2019-02-11 | 日商新力股份有限公司 | 送訊裝置、收訊裝置及資訊處理方法 |
US10417560B2 (en) * | 2016-12-01 | 2019-09-17 | Via Alliance Semiconductor Co., Ltd. | Neural network unit that performs efficient 3-dimensional convolutions |
WO2018166695A1 (en) | 2017-03-16 | 2018-09-20 | British Telecommunications Public Limited Company | Branched communications network |
GB2560570A (en) * | 2017-03-16 | 2018-09-19 | British Telecomm | Branched communications network |
US10892843B2 (en) | 2017-03-16 | 2021-01-12 | British Telecommunications Public Limited Company | Broadcasting in a communications network |
US10879952B2 (en) * | 2018-04-18 | 2020-12-29 | Huawei Technologies Co., Ltd. | Apparatus and receiver for performing synchronization in analog spread spectrum systems |
CN111308521B (zh) * | 2018-12-12 | 2022-03-04 | 北京紫光展锐通信技术有限公司 | Gnss系统的码相位估计、伪距测量方法及装置、终端 |
CN110690902B (zh) * | 2019-09-25 | 2022-05-17 | 电子科技大学 | 一种基于随机截断的时间交织adc失配优化方法 |
CN114826324A (zh) * | 2022-05-06 | 2022-07-29 | 中国人民解放军海军潜艇学院 | 一种基于频率压缩-能量接收器的水下移动扩频通信方法 |
CN115567169A (zh) * | 2022-12-06 | 2023-01-03 | 成都航天通信设备有限责任公司 | 一种低编码速率下的解调译码方法、系统、设备及存储介质 |
CN116232423A (zh) * | 2022-12-29 | 2023-06-06 | 西安空间无线电技术研究所 | 一种基于主从同步的时分双工星间链路通信方法 |
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US4969159A (en) * | 1989-03-22 | 1990-11-06 | Harris Corporation | Spread spectrum communication system employing composite spreading codes with matched filter demodulator |
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ZA938324B (en) | 1992-11-24 | 1994-06-07 | Qualcomm Inc | Pilot carrier dot product circuit |
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JP3040481B2 (ja) | 1994-07-29 | 2000-05-15 | クゥアルコム・インコーポレイテッド | Cdma通信システムのサーチ獲得を行う改良された方法および装置 |
US5691974A (en) | 1995-01-04 | 1997-11-25 | Qualcomm Incorporated | Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking individual recipient phase, time and energy |
US5790588A (en) * | 1995-06-07 | 1998-08-04 | Ntt Mobile Communications Network, Inc. | Spread spectrum transmitter and receiver employing composite spreading codes |
US5577025A (en) * | 1995-06-30 | 1996-11-19 | Qualcomm Incorporated | Signal acquisition in a multi-user communication system using multiple walsh channels |
-
1998
- 1998-10-09 EP EP98956104A patent/EP1029398B1/en not_active Expired - Lifetime
- 1998-10-09 DE DE69841326T patent/DE69841326D1/de not_active Expired - Lifetime
- 1998-10-09 AU AU12702/99A patent/AU754257B2/en not_active Ceased
- 1998-10-09 BR BR9813026-9A patent/BR9813026A/pt not_active Application Discontinuation
- 1998-10-09 US US09/169,358 patent/US6493376B1/en not_active Expired - Lifetime
- 1998-10-09 WO PCT/US1998/021466 patent/WO1999019992A1/en active IP Right Grant
- 1998-10-09 AT AT98956104T patent/ATE450084T1/de not_active IP Right Cessation
- 1998-10-09 RU RU2000111521/09A patent/RU2221337C2/ru not_active IP Right Cessation
- 1998-10-09 CN CN200610004606A patent/CN100590988C/zh not_active Expired - Lifetime
- 1998-10-09 JP JP2000516440A patent/JP4386574B2/ja not_active Expired - Lifetime
- 1998-10-09 CN CNB988120992A patent/CN100459444C/zh not_active Expired - Lifetime
- 1998-10-09 KR KR1020007003877A patent/KR100693682B1/ko not_active IP Right Cessation
- 1998-10-09 CA CA2305718A patent/CA2305718C/en not_active Expired - Fee Related
-
2000
- 2000-04-07 NO NO20001819A patent/NO318825B1/no not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NO20001819D0 (no) | 2000-04-07 |
CA2305718A1 (en) | 1999-04-22 |
CN1819473A (zh) | 2006-08-16 |
EP1029398B1 (en) | 2009-11-25 |
AU1270299A (en) | 1999-05-03 |
JP2001520473A (ja) | 2001-10-30 |
NO318825B1 (no) | 2005-05-09 |
CN100590988C (zh) | 2010-02-17 |
RU2221337C2 (ru) | 2004-01-10 |
WO1999019992A1 (en) | 1999-04-22 |
EP1029398A1 (en) | 2000-08-23 |
JP4386574B2 (ja) | 2009-12-16 |
CA2305718C (en) | 2010-12-07 |
NO20001819L (no) | 2000-06-08 |
KR100693682B1 (ko) | 2007-03-09 |
ATE450084T1 (de) | 2009-12-15 |
CN1281599A (zh) | 2001-01-24 |
KR20010031050A (ko) | 2001-04-16 |
CN100459444C (zh) | 2009-02-04 |
AU754257B2 (en) | 2002-11-07 |
DE69841326D1 (de) | 2010-01-07 |
US6493376B1 (en) | 2002-12-10 |
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