WO2001024405A1 - Procede permettant d'indiquer sur un canal de synchronisation s'il existe un codage bloc espace-temps dans le canal de commande commun - Google Patents
Procede permettant d'indiquer sur un canal de synchronisation s'il existe un codage bloc espace-temps dans le canal de commande commun Download PDFInfo
- Publication number
- WO2001024405A1 WO2001024405A1 PCT/CN2000/000188 CN0000188W WO0124405A1 WO 2001024405 A1 WO2001024405 A1 WO 2001024405A1 CN 0000188 W CN0000188 W CN 0000188W WO 0124405 A1 WO0124405 A1 WO 0124405A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- channel
- primary
- modulation
- space
- common control
- Prior art date
Links
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
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
Definitions
- the present invention relates to a method for indicating space-time block coding (STTD) on a synchronization channel, and in particular to a base station indicating whether there is a transmission based on space-time block coding (STTD) on a primary and secondary synchronization channel.
- STTD space-time block coding
- the synchronization channel includes a primary synchronization channel and a secondary synchronization channel, which transmit signals during the first 256 chip times of a time slot.
- Space time block coding based transmit antenna diversity is an effective method for enhancing downlink reception performance in a code division multiple access system.
- the base station may use open-loop transmit diversity for some channels, such as the primary common control channel (PCCPCH), secondary common control channel (SCCPCH), and dedicated physical channels, or may not use open-loop transmit diversity.
- the information required by the mobile station for reverse access must be extracted from the main common control channel (PCCPCH). Therefore, the mobile station must know the main common control channel (PCCPCH) before decoding the information of the main common control channel (PCCPCH). Whether to use "space-time block coding (STTD)".
- a mobile station In an asynchronous code division multiple access system, a mobile station first obtains slot synchronization and frame synchronization through cell search, and identifies the scrambling code used by the cell.
- C p is the primary synchronization code
- a is the primary and secondary synchronization channels.
- C s i ' k is 16 possible secondary synchronization codes
- C s u , C s u ... i' 15 indicates the group number 1 to which the long scrambling code of the cell belongs.
- This method belongs to binary phase shift keying (BPSK) modulation, and demodulation of binary phase shift keying (BPSK) requires a reference phase. If the reference phase is inverted, the demodulated data will be exactly the opposite, that is, if the reference phase is turned 180 degrees, +1 will be demodulated to -1, and -1 will be demodulated to +1.
- BPSK binary phase shift keying
- the pilot symbol phase of the common pilot channel can be used as the reference phase. That is, the phase rotation of the common pilot channel (CPICH) pilot symbols is estimated and used as compensation to recover the modulated signal a, but this obviously increases the complexity of the ⁇ system.
- the purpose of the present invention is to overcome the shortcomings of the existing method of indicating whether there is a space-time block coding STTD on the main common control channel, and a method is proposed to reduce the system complexity and indicate whether the main common control channel has the Non-space-time block coding method. Summary of the invention
- the technical solution for achieving the purpose of the present invention is: a method for indicating whether there is space-time block coding on the primary common control channel on the synchronization channel, and adopting a phase modulation method for the primary and secondary synchronization channels, wherein:
- the base station instructs the primary common control channel on the synchronization channel to use the space-time block coding-based transmit diversity method
- the base station When the primary and secondary synchronization channels use the opposite phase or the same phase modulation mode, the base station indicates on the synchronization channel that the primary common control channel does not use the space-time block coding-based transmit diversity method.
- the reference phase does not need to be used, so the complexity of the system is reduced, and the operation is simpler.
- FIG. 1 is a schematic diagram of a prior art modulation process for a synchronization channel
- FIG. 2 is a schematic diagram of modulation and coding in the prior art
- FIG. 3 is a schematic diagram of a synchronization channel modulation process according to the present invention.
- FIG. 4 is a schematic diagram of a modulation and coding scheme of the present invention.
- Figure 5 is a schematic diagram of the second modulation and coding method of the present invention. The best embodiment of the present invention
- the synchronization channel (SCH) channel includes a primary synchronization channel and a secondary synchronization channel. Generally, they send signals within the first 256 chip times of a time slot.
- Space-time block coding STTD open-loop transmit diversity is a code division multiple access system. An effective method for enhancing downlink reception performance in CDMA.
- the base station may use open-loop transmit diversity for some channels, such as the primary CCPCH channel (primary common control channel), the secondary CCPCH channel (secondary common control channel), and the dedicated physical channel, or may not use open-loop transmit diversity.
- the present invention proposes adopting phase modulation.
- C p is the primary synchronization code
- a is the modulation on the primary synchronization channel
- b is the modulation on the secondary synchronization channel.
- C s u , C s u ,... C s i 15 indicates the group number 1 to which the long scrambling code of the cell belongs.
- STTD space-time block coding
- Embodiment 2 (as shown in FIG. 5), the present invention can also adopt the opposite modulation method.
- SP When the base station adopts space-time block coding (STTD), the inverse modulation method is adopted for the primary and secondary synchronization channels; when the base station instructs When the main common control channel does not use space-time block coding (STTD), in-phase modulation is used for the primary and secondary synchronization channels.
- STTD space-time block coding
- STTD space-time block coding
- STTD space-time block coding
- STTD space-time block coding
- in-phase modulation is used for the primary and secondary synchronization channels.
- the mobile station uses the same phase modulation to instruct the main common control channel to use space-time block coding
- the mobile station The correlation value output by the secondary synchronization code correlator determines whether the two outputs have the same polarity; if they have the same polarity, the main common control channel is considered to adopt space-time block coding; if they have opposite polarities, It is considered that the main common control channel does not use space-time block coding.
- the mobile station determines whether the two outputs have opposite polarities according to the correlation values output by the primary and secondary synchronization code correlators; If it has the opposite polarity, it is considered that the main common control channel uses space-time block coding; if it has the same polarity, it is considered that the main common control channel does not use space-time block coding.
- the above detection method is simple, because the possible phase rotations on the primary and secondary synchronization channels are the same, and even without a phase reference, the signal can be detected correctly.
- the method of the invention is simple and reliable, and it is accurate to identify whether there is space-time block coding (STTD) on the primary common control channel of the primary and secondary synchronization channels, thereby improving the efficiency of cell search and simplifying the complexity of the system.
- STTD space-time block coding
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU56704/00A AU5670400A (en) | 1999-09-30 | 2000-07-03 | A method for indicating on a synchronal channel if there is any space-time blockcoding in main common control channel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN99116940.9 | 1999-09-30 | ||
CN 99116940 CN1124713C (zh) | 1999-09-30 | 1999-09-30 | 同步信道上指示主公共控制信道有无空时块编码的方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001024405A1 true WO2001024405A1 (fr) | 2001-04-05 |
Family
ID=5279604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2000/000188 WO2001024405A1 (fr) | 1999-09-30 | 2000-07-03 | Procede permettant d'indiquer sur un canal de synchronisation s'il existe un codage bloc espace-temps dans le canal de commande commun |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN1124713C (zh) |
AU (1) | AU5670400A (zh) |
WO (1) | WO2001024405A1 (zh) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2848747A1 (fr) * | 2002-12-16 | 2004-06-18 | France Telecom | Procede et dispositif multi-antenne de transmission de signaux |
CN101729198B (zh) * | 2008-10-27 | 2014-04-02 | 华为技术有限公司 | 一种编解码方法、装置及系统 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999014871A1 (en) * | 1997-09-16 | 1999-03-25 | At & T Wireless Services, Inc. | Transmitter diversity technique for wireless communications |
WO2000014921A1 (en) * | 1998-09-04 | 2000-03-16 | At & T Corp. | Combined channel coding and space-block coding in a multi-antenna arrangement |
-
1999
- 1999-09-30 CN CN 99116940 patent/CN1124713C/zh not_active Expired - Fee Related
-
2000
- 2000-07-03 AU AU56704/00A patent/AU5670400A/en not_active Abandoned
- 2000-07-03 WO PCT/CN2000/000188 patent/WO2001024405A1/zh active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999014871A1 (en) * | 1997-09-16 | 1999-03-25 | At & T Wireless Services, Inc. | Transmitter diversity technique for wireless communications |
WO2000014921A1 (en) * | 1998-09-04 | 2000-03-16 | At & T Corp. | Combined channel coding and space-block coding in a multi-antenna arrangement |
Also Published As
Publication number | Publication date |
---|---|
AU5670400A (en) | 2001-04-30 |
CN1124713C (zh) | 2003-10-15 |
CN1291014A (zh) | 2001-04-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9780930B2 (en) | Communicating reference and data information in a wireless network | |
JP4109119B2 (ja) | 通信システムにおける方法および装置 | |
RU2379845C2 (ru) | Устройство и способ для передачи и приема обратного канала в системе мобильной связи для мобильных данных | |
US6804311B1 (en) | Diversity detection for WCDMA | |
EP1252723B1 (en) | Support of multiuser detection in the downlink | |
EP1204256B1 (en) | Adaptive modulation communication system | |
EP1338101B1 (en) | Receiver architecture for transmit diversity in cdma system | |
US20030031230A1 (en) | Apparatus and method for communicating packet data control channel in a mobile communication system | |
CN102271023A (zh) | 长期演进lte系统的系统帧号检测方法及装置 | |
JP2004524727A (ja) | 複数の拡散符号を用いた単純なブロック空間時間ダイバーシティ | |
KR0172967B1 (ko) | 직렬 데이타 시스템에서 신호 패킷을 회복하는 장치 및 방법 | |
WO2001024405A1 (fr) | Procede permettant d'indiquer sur un canal de synchronisation s'il existe un codage bloc espace-temps dans le canal de commande commun | |
US6072785A (en) | Differential PSK signalling in CDMA networks | |
JP2004533783A (ja) | CDMAシステムにおける電力制御ビットを用いるEb/Nt推定 | |
JP4955850B2 (ja) | Wcdmaのためのダイバーシティ検出 | |
CN113098653B (zh) | 一种基于恒定包络信号的物理层隐蔽传输装置及方法 | |
CN101179293B (zh) | 无线通信系统中的信道估计方法、装置和接收机 | |
US7920657B2 (en) | Apparatus and method for decoding space-time block coded (STBC) signal | |
WO2008072355A1 (ja) | 移動局及び移動局におけるアンテナベリフィケーション制御方法 | |
WO2003009489A1 (fr) | Appareil de reception amrc et procede de reception amrc | |
CN114629524B (zh) | 基于广义码索引调制的方法 | |
KR20040033203A (ko) | 논리 and연산 다이버시티 결합방법 | |
US20080285632A1 (en) | Decoding of the overhead channels of the geo satellite reverse link | |
WO2002021712A1 (fr) | Procede d'estimation de voie et systeme permettant de mettre en oeuvre ledit procede | |
KR20020015086A (ko) | 무선통신에서 차동코딩을 이용한 직교송신 다이버시티 방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
122 | Ep: pct application non-entry in european phase | ||
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
NENP | Non-entry into the national phase |
Ref country code: JP |