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Hybrid Turbo FEC/ARQ Systems and Distributed Space-Time Coding for Cooperative Transmission.

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Title: Hybrid Turbo FEC/ARQ Systems and Distributed Space-Time Coding for Cooperative Transmission.
Authors: Agustin, Adrian1 agustin@jgps.tsc.upc.es, Vidal, Josep1, Muñoz, Olga1
Source: International Journal of Wireless Information Networks. Dec2005, Vol. 12 Issue 4, p263-280. 18p.
Subjects: Turbo languages (Computer program language), Space-time codes, Antennas (Electronics), Data transmission systems, Wireless communications, Electronic equipment, Telecommunication, Programming languages, System analysis
Abstract: Cooperative transmission can be seen as a "virtual" MIMO system, where the multiple transmit antennas are in fact implemented distributed by the antennas both at the source and the relay terminal. Depending on the system design, diversity/multiplexing gains are achievable. This design involves the definition of the type of retransmission (incremental redundancy, repetition coding), the design of the distributed space-time codes, the error correcting scheme, the operation of the relay (decode & forward or amplify & forward) and the number of antennas at each terminal. Proposed schemes are evaluated in different conditions in combination with forward error correcting codes (FEC), both for linear and near-optimum (sphere decoder) receivers, for its possible implementation in downlink high speed packet services of cellular networks. Results show the benefits of coded cooperation over direct transmission in terms of increased throughput. It is shown that multiplexing gains are observed even if the mobile station features a single antenna, provided that cell wide reuse of the relay radio resource is possible. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Cooperative transmission can be seen as a "virtual" MIMO system, where the multiple transmit antennas are in fact implemented distributed by the antennas both at the source and the relay terminal. Depending on the system design, diversity/multiplexing gains are achievable. This design involves the definition of the type of retransmission (incremental redundancy, repetition coding), the design of the distributed space-time codes, the error correcting scheme, the operation of the relay (decode & forward or amplify & forward) and the number of antennas at each terminal. Proposed schemes are evaluated in different conditions in combination with forward error correcting codes (FEC), both for linear and near-optimum (sphere decoder) receivers, for its possible implementation in downlink high speed packet services of cellular networks. Results show the benefits of coded cooperation over direct transmission in terms of increased throughput. It is shown that multiplexing gains are observed even if the mobile station features a single antenna, provided that cell wide reuse of the relay radio resource is possible. [ABSTRACT FROM AUTHOR]
ISSN:10689605
DOI:10.1007/s10776-005-0012-z