WO2003019849A1 - Procede pour ameliorer la fiabilite de diversite en emission par integration de l'entrelacement des donnees d'emission dans une seule tranche de temps - Google Patents

Procede pour ameliorer la fiabilite de diversite en emission par integration de l'entrelacement des donnees d'emission dans une seule tranche de temps Download PDF

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Publication number
WO2003019849A1
WO2003019849A1 PCT/EP2002/009344 EP0209344W WO03019849A1 WO 2003019849 A1 WO2003019849 A1 WO 2003019849A1 EP 0209344 W EP0209344 W EP 0209344W WO 03019849 A1 WO03019849 A1 WO 03019849A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
interleaving
code
applying
spreading
Prior art date
Application number
PCT/EP2002/009344
Other languages
English (en)
Inventor
Stephen William Wales
Original Assignee
Siemens Aktiengesellschaft
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 claimed from GB0120535A external-priority patent/GB0120535D0/en
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP02796256A priority Critical patent/EP1419605A1/fr
Publication of WO2003019849A1 publication Critical patent/WO2003019849A1/fr

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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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • 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 of improving transient diversity reliability.
  • transmit diversity is a known technique which is used to improve down-link reception performance, by providing different transmission paths to a mobile 0 receiver.
  • a base station transmits data from a mobile communication unit (telephone) it can be determined which path i.e. which base station, at that time is able to provide the best reception to 5 signals from the mobile communication unit. Consequently it can be assumed that subsequent reply transmissions, to the mobile communication unit, are also made from the base station that has the best reception. This is because the link can be assumed to be a reciprocal channel i.e. the channel impulse response is the same in both directions. 0
  • Feedback information from a receiver at the mobile communication unit dictates from which base station antenna it is best to transmit. This technique is known as "switched antenna diversity". If characteristic signal fading, applied to each transmission path, is 5 sufficiently decorrelated then the likelihood that all transmission paths suffer equally from signal fading is reduced.
  • the system appears to utilise a parallel or serial concatenated convolutional code.
  • Polynomials output by the generator are mapped to different antennas.
  • Interleavers are part of a normal concatenated code where interleaving is performed between coding steps. Instead of time multiplexing the outputs of different generator polynomials into a single stream, the different generator polynomials are multiplexed to different antennas. Interleaving is performed after error correction coding and not as part of the error correction coding process.
  • a number of transmit diversity schemes have been developed including switched antenna diversity as described above.
  • Delay diversity is also known where the same transmission is made from each antenna but a known delay is deliberately introduced betweentransmissions.
  • different spreading codes or different sets of spreading codes are assigned to different users. If a fixed spreading factor is used, then different transmission rates are accommodated by data being spread by a number of spreading codes by forming a multi-code group. The codes of the multi-code group are transmitted in parallel.
  • a method of transmitting digitised data via at least two transmission paths (channels) includes the step of applying interleaving of data in the space domain.
  • the method is carried out using the steps of: a) coding data by spreading the data using a number of spreading codes; b) applying interleaving to the coded data in the space domain; c) frame segmenting the coded data ; and d) transmitting said frame segmented data via at least two antennae:
  • the inventor has determined a method of overcoming the problems, when using multi-code transmissions where different codes are mapped to different antennas.
  • interleaving is also applied in the time domain.
  • Interleaving is a technique used to prevent severe data loss and acts to spread errors when used with an error correcting code.
  • an interleaved block is obtained.
  • the interleaved block is then segmented and transmitted in different time slots, if a time slotted transmission format is employed.
  • bits of data are shuffled before insertion into the time slots.
  • shuffled data is reordered. If the data in one time slot gets lost, corrupted or destroyed, for example due to fading, then there is a chance that data arriving in a subsequent time slot, remains intact. Errors are thus spread and subsequent application of error correction methods allows lost data to be recovered more effectively.
  • Figure 1 shows a schematic representation of a simple embodiment of the invention showing downlink transmission via multiple antennas using interleaving in the coding (space) domain;
  • Figure 2 shows a further embodiment employing interleaving in both the time and coding (space) domain
  • Figure 3 compares shows a further embodiment of the invention where time domain interleaving is also incorporated.
  • data transmitted is first encoded using a convolutional encoder 1.
  • Other encoders such as a Turbo encoder may alternatively be used.
  • the coded data is interleaved in the space domain before segmentation. This is done by interleaving the data to be transmitted in a single time slot before segmentation 3 into parallel data blocks. Data blocks are transmitted by each code of the multi-code group. This interleaving is hereinafter referred to as interleaving in the space domain and any reference to such should be inte ⁇ reted as above.
  • the data to be transmitted on each code is modulated and spread 4 according to a known spreading function. The data is then transmitted by one of the antennas 5 at the base station.
  • This example is similar to that described in Example 1 above, but includes an extra stage of interleaving in the time domain shown as 7 in Figure 2. Again data is encoded. The resulting data is then interleaved across multiple frames and segmented into data to be transmitted in each frame. Data for one frame is mapped to multiple spreading codes in a single time slot.
  • the above frame interleaving process is essentially time interleaving.
  • Space domain interleaving is then applied. This is done by the following process, as before by applying interleaving to data transmitted within one time slot; i.e. time slot interleaving is a way of applying code domain interleaving
  • data is divided into multiple segments. Each segment is transmitted using a different spreading code.
  • Transmissions are received by a mobile telephone.
  • the signal is de-spread, and is then subjected to a detection process, comprising a channel impulse response estimator and an appropriate detection algorithm.
  • the transmitted signal must support the possibility for the receiver base station to estimate each of the transmission paths to the mobile telephone and to associate respective channel impulse responses with one or more of the spreading codes of the multi-code group. This can be achieved in a number of ways through either code specific known data sequences, for example as used in the UTRA TDD system or through transmit antenna specific known data sequences and knowledge of the antenna code mapping. After detection the data is de-interleaved before being decoded.
  • each burst contains two data fields either side of a known midamble sequence.
  • This unique midamble sequence can be associated with a spreading code according to a default mapping consequently the mobile telephone can obtain a channel estimate associated with each spreading code and this is sufficient for detection pu ⁇ oses.
  • the mobile telephone does not need information concerning the mapping of spreading codes to antennas.
  • Example 2 provide equal performance to that of switched antenna diversity in a TDD system where the reciprocal nature of the channel is used to select from which antenna to transmit.
  • One advantage of space-time interleaving transmit diversity is that it is not reliant upon the presence of any feedback and can be used for common control channels.
  • FIG. 3 An example of the performance achieved using space time interleaving is shown in Figure 3 for a typical multipath channel model.
  • a 64kb/s data channel is encoded using a 1/3 rate Turbo code and transmitted using 6 spreading codes mapped to two antennas.
  • the performance of space-time interleaving (S-TI) is shown to be comparable to switched antenna diversity (SA), which relies upon transmissions from the mobile telephone to determine from which antenna to transmit.
  • SA switched antenna diversity

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé permettant, dans un système de télécommunication, d'émettre des données numérisées par l'intermédiaire d'au moins deux voies de transmission (canaux) et comportant comme étape le fait d'appliquer un entrelacement dans le domaine spatial, c.-à-d. un entrelacement dans une seule tranche de temps, ce qui suppose de préférence les étapes suivantes : coder les données par diffusion des données à l'aide d'un nombre de codes de diffusion ; appliquer l'entrelacement dans le domaine spatial ; segmenter les données en trame et émettre lesdites données par l'intermédiaire d'au moins deux antennes. L'entrelacement peut également être appliqué à travers le domaine spatial.
PCT/EP2002/009344 2001-08-23 2002-08-20 Procede pour ameliorer la fiabilite de diversite en emission par integration de l'entrelacement des donnees d'emission dans une seule tranche de temps WO2003019849A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02796256A EP1419605A1 (fr) 2001-08-23 2002-08-20 Procede pour ameliorer la fiabilite de diversite en emission par integration de l'entrelacement des donnees d'emission dans une seule tranche de temps

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0120535.0 2001-08-23
GB0120535A GB0120535D0 (en) 2001-08-23 2001-08-23 Space-time interleaving transmit diversity
GB0127207A GB2379136B (en) 2001-08-23 2001-11-10 Method of improving transmit diversity reliability
GB0127207.9 2001-11-10

Publications (1)

Publication Number Publication Date
WO2003019849A1 true WO2003019849A1 (fr) 2003-03-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/009344 WO2003019849A1 (fr) 2001-08-23 2002-08-20 Procede pour ameliorer la fiabilite de diversite en emission par integration de l'entrelacement des donnees d'emission dans une seule tranche de temps

Country Status (3)

Country Link
EP (1) EP1419605A1 (fr)
CN (1) CN1309198C (fr)
WO (1) WO2003019849A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2408898A (en) * 2003-12-02 2005-06-08 Toshiba Res Europ Ltd Wireless transmission of a data sequence
EP1687927A2 (fr) * 2003-11-24 2006-08-09 Nokia Corporation Appareil et procede associe destines a la transmission de donnees de communication dans un systeme de communication a entrees et sorties multiples
WO2009062417A1 (fr) * 2007-11-16 2009-05-22 Shenzhen Hyt Science & Technology Co., Ltd. Procédé destiné à améliorer la fiabilité de la transmission de bits d'informations
WO2010091423A2 (fr) 2009-02-09 2010-08-12 Qualcomm Incorporated Schémas de codage et de multiplexage pour plusieurs antennes d'émission dans un système de communication sans fil

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1670168B1 (fr) * 2004-12-13 2010-07-28 Mitsubishi Electric Information Technology Centre Europe B.V. Procédé, système et dispositif pour la transmission des données également distribuées dans les systèmes MIMO
CN101299627B (zh) * 2007-05-03 2012-12-26 上海贝尔股份有限公司 移动终端和发送信息帧的方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982870A1 (fr) * 1998-08-21 2000-03-01 Lucent Technologies Inc. Système à AMDC multi-code utilisant une décodage itérative
WO2001029986A1 (fr) * 1999-10-19 2001-04-26 Nokia Networks Oy Optimisation de qualite de liaison par entrelacement spatial et temporel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI106897B (fi) * 1998-09-14 2001-04-30 Nokia Networks Oy RAKE-vastaanotin

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982870A1 (fr) * 1998-08-21 2000-03-01 Lucent Technologies Inc. Système à AMDC multi-code utilisant une décodage itérative
WO2001029986A1 (fr) * 1999-10-19 2001-04-26 Nokia Networks Oy Optimisation de qualite de liaison par entrelacement spatial et temporel

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
"Universal Mobile Telecommunications system (UMTS); Multiplexing and channel coding (TDD) (3GPP TS 25.222 version 3.6.0 Release 1999)", ETSI TS 125 222 V 3.6.0 (2001-03), March 2001 (2001-03-01), pages 8 - 38, XP002213943 *
"Universal Mobile Telecommunications system (UMTS); Physical Layer Procedures (TDD) (3GPP TS 25.224 version 3.7.0 Release 1999)", ETSI TS 125 224 V3.7.0 (2001-06), June 2001 (2001-06-01), pages 14 - 21, XP002213945 *
"Universal Mobile Telecommunications system (UMTS); Spreading and Modulation (TDD) (3GPP TS 25.223 version 3.6.0 Release 1999)", ETSI TS 125 223 V3.6.0 (2001-06), June 2001 (2001-06-01), pages 7 - 12, XP002213944 *
KLEIN A ET AL: "ZERO FORCING AND MINIMUM MEAN-SQUARE-ERROR EQUALIZATION FOR MULTIUSER DETECTION IN CODE-DIVISION MULTIPLE-ACCESS CHANNELS", IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, IEEE INC. NEW YORK, US, vol. 45, no. 2, 1 May 1996 (1996-05-01), pages 276 - 287, XP000598095, ISSN: 0018-9545 *
STEINER B ET AL: "OPTIMUM AND SUBOPTIMUM CHANNEL ESTIMATION FOR THE UPLINK OF CDMA MOBILE RADIO SYSTEMS WITH JOINT DETECTION", EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS AND RELATED TECHNOLOGIES, AEI, MILANO, IT, vol. 5, no. 1, 1994, pages 39 - 50, XP000445714, ISSN: 1120-3862 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1687927A2 (fr) * 2003-11-24 2006-08-09 Nokia Corporation Appareil et procede associe destines a la transmission de donnees de communication dans un systeme de communication a entrees et sorties multiples
EP1687927A4 (fr) * 2003-11-24 2011-04-06 Nokia Corp Appareil et procede associe destines a la transmission de donnees de communication dans un systeme de communication a entrees et sorties multiples
GB2408898A (en) * 2003-12-02 2005-06-08 Toshiba Res Europ Ltd Wireless transmission of a data sequence
GB2408898B (en) * 2003-12-02 2006-08-16 Toshiba Res Europ Ltd Improved communications apparatus and methods
WO2009062417A1 (fr) * 2007-11-16 2009-05-22 Shenzhen Hyt Science & Technology Co., Ltd. Procédé destiné à améliorer la fiabilité de la transmission de bits d'informations
WO2010091423A2 (fr) 2009-02-09 2010-08-12 Qualcomm Incorporated Schémas de codage et de multiplexage pour plusieurs antennes d'émission dans un système de communication sans fil
WO2010091423A3 (fr) * 2009-02-09 2010-11-25 Qualcomm Incorporated Schémas de codage et de multiplexage pour plusieurs antennes d'émission dans un système de communication sans fil
JP2012517745A (ja) * 2009-02-09 2012-08-02 クゥアルコム・インコーポレイテッド ワイヤレス通信システムにおける複数の送信アンテナのための多重化およびコーディングスキーム
US8737502B2 (en) 2009-02-09 2014-05-27 Qualcomm Incorporated Multiplexing and coding schemes for multiple transmit antennas in a wireless communication system

Also Published As

Publication number Publication date
CN1309198C (zh) 2007-04-04
EP1419605A1 (fr) 2004-05-19
CN1545780A (zh) 2004-11-10

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