WO2002084914A1 - Procede de mise en oeuvre d'un codage de sequences ternaires a etalement de spectre dans un systeme amrc - Google Patents
Procede de mise en oeuvre d'un codage de sequences ternaires a etalement de spectre dans un systeme amrc Download PDFInfo
- Publication number
- WO2002084914A1 WO2002084914A1 PCT/CN2001/000560 CN0100560W WO02084914A1 WO 2002084914 A1 WO2002084914 A1 WO 2002084914A1 CN 0100560 W CN0100560 W CN 0100560W WO 02084914 A1 WO02084914 A1 WO 02084914A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sequence
- correlation
- length
- zero
- group
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0055—ZCZ [zero correlation zone]
- H04J13/007—LAS, i.e. LA, LS and LAS codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
- H04J13/14—Generation of codes with a zero correlation zone
Definitions
- All the basic pulse intervals of the spreading sequence code group are greater than or equal to the length of the zero correlation region Z cz , and the difference between the positions of any two basic pulses is different under the operation of the modulus sequence length.
- the pulse interval is odd or even.
- the autocorrelation function of any sequence in the spreading sequence code group has a zero correlation area on both sides of the zero shift and the zero shift. There are zero correlation areas on both sides of the zero shift. Outside the zero correlation area, the auto-correlation value and cross-correlation value are only 1, 0, and -1.
- the correlation functions include periodic correlation, aperiodic correlation, and periodic odd correlation, and the zero correlation regions of the three correlation functions are all equal.
- the pulse interval in the construction method 1 is strictly increasing. Generally, the sequence of the pulse intervals in increasing order cannot reach the minimum length. To this end, the method 1 can be used as a basis to further improve the algorithm, so another method is proposed.
- the spreading sequence code group is composed of basic pulses with a normalized amplitude and width of 1 and polarity, and includes at least the following steps. : a. Given the basic pulse number of the LA sequence and the length of the zero correlation region, generate a base sequence s of length N;
- the second construction method includes the following steps:
- FIG. 4 it is a cycle-period cross-correlation function diagram of sequence 1 and sequence 2 in FIG. Other arbitrary sequence pairs have completely similar periodic cross-correlation functions.
- the instantaneous delay falls within (-16, 16)
- the value of the periodic cross-correlation function is zero. Otherwise, the periodic cross-correlation value is only 1, 0, -1.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2001/000560 WO2002084914A1 (fr) | 2001-04-18 | 2001-04-18 | Procede de mise en oeuvre d'un codage de sequences ternaires a etalement de spectre dans un systeme amrc |
CN01809591.7A CN1201514C (zh) | 2001-04-18 | 2001-04-18 | 码分多址系统中三进制扩频序列编码的实现方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2001/000560 WO2002084914A1 (fr) | 2001-04-18 | 2001-04-18 | Procede de mise en oeuvre d'un codage de sequences ternaires a etalement de spectre dans un systeme amrc |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002084914A1 true WO2002084914A1 (fr) | 2002-10-24 |
Family
ID=4574787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2001/000560 WO2002084914A1 (fr) | 2001-04-18 | 2001-04-18 | Procede de mise en oeuvre d'un codage de sequences ternaires a etalement de spectre dans un systeme amrc |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN1201514C (fr) |
WO (1) | WO2002084914A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008116413A1 (fr) * | 2007-03-27 | 2008-10-02 | Huawei Technologies Co., Ltd. | Procédé et dispositif pour générer un code de zone de corrélation nulle, un code d'étalement d'émission et un code d'étalement de réception |
WO2012037638A1 (fr) * | 2010-09-21 | 2012-03-29 | Jazzar, Samer Omar | Générateur de code triphase dans un système de communication sans fil cdma |
CN109039523A (zh) * | 2018-07-31 | 2018-12-18 | 深圳大学 | 一种大零相关区二维单极性码的构造方法及系统 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100367740C (zh) * | 2003-12-31 | 2008-02-06 | 清华大学 | 一种无线通信中的互补编码键控调制方法 |
CN108092691A (zh) * | 2016-11-09 | 2018-05-29 | 宜春市等比科技有限公司 | 一种运用双伪随机码扩频的方法 |
JP7062763B2 (ja) | 2017-11-10 | 2022-05-06 | 中興通訊股▲ふん▼有限公司 | 短シーケンス信号のグループ化および使用 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0869632A1 (fr) * | 1996-09-20 | 1998-10-07 | Toyo Communication Equipment Co. Ltd. | Systeme de communication diphase/tetraphase a modulation a spectre en peigne etale |
EP1006687A1 (fr) * | 1997-08-12 | 2000-06-07 | Daoben Li | Codage d'adresses par etalement de spectre |
WO2000045530A1 (fr) * | 1999-01-29 | 2000-08-03 | Toyo Communication Equipment Co., Ltd. | Systeme adaptatif a spectre etale et debarasse d'interferences, employant des jeux de sequences de codes binaires presentant des proprietes de zone a correlation nulle |
-
2001
- 2001-04-18 WO PCT/CN2001/000560 patent/WO2002084914A1/fr active Application Filing
- 2001-04-18 CN CN01809591.7A patent/CN1201514C/zh not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0869632A1 (fr) * | 1996-09-20 | 1998-10-07 | Toyo Communication Equipment Co. Ltd. | Systeme de communication diphase/tetraphase a modulation a spectre en peigne etale |
EP1006687A1 (fr) * | 1997-08-12 | 2000-06-07 | Daoben Li | Codage d'adresses par etalement de spectre |
WO2000045530A1 (fr) * | 1999-01-29 | 2000-08-03 | Toyo Communication Equipment Co., Ltd. | Systeme adaptatif a spectre etale et debarasse d'interferences, employant des jeux de sequences de codes binaires presentant des proprietes de zone a correlation nulle |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008116413A1 (fr) * | 2007-03-27 | 2008-10-02 | Huawei Technologies Co., Ltd. | Procédé et dispositif pour générer un code de zone de corrélation nulle, un code d'étalement d'émission et un code d'étalement de réception |
CN101277125B (zh) * | 2007-03-27 | 2013-04-24 | 华为技术有限公司 | 产生零相关区码、发送扩频码和接收扩频码的方法及装置 |
WO2012037638A1 (fr) * | 2010-09-21 | 2012-03-29 | Jazzar, Samer Omar | Générateur de code triphase dans un système de communication sans fil cdma |
GB2497219A (en) * | 2010-09-21 | 2013-06-05 | Samer Omar Jazzar | A Tri-Phase code generator in a CDMA wireless communication system |
CN109039523A (zh) * | 2018-07-31 | 2018-12-18 | 深圳大学 | 一种大零相关区二维单极性码的构造方法及系统 |
CN109039523B (zh) * | 2018-07-31 | 2020-03-20 | 深圳大学 | 一种大零相关区二维单极性码的构造方法及系统 |
Also Published As
Publication number | Publication date |
---|---|
CN1429440A (zh) | 2003-07-09 |
CN1201514C (zh) | 2005-05-11 |
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