Randomized cyclic delay code for cooperative communication systems

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We deal here with distributed cooperative communication systems' in which a single source transmits its information with the help of multiple relays to a destination. Specifically, we consider decode and forward relay networks based on orthogonal frequency division multiplexing (OFDM). Most previous work needs a priori information for antenna allocation to obtain cooperative diversity advantages. We propose a simple method that does not require additional information in order to coordinate relay transmission. Our main proposal is to retransmit randomly cyclic-shifted sequences of the received symbol at relays. Simulation results verify that full gain in diversity is achieved when the number of subcarriers is sufficiently large.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2008-04
Language
English
Article Type
Article
Keywords

DIVERSITY; NETWORKS

Citation

IEEE COMMUNICATIONS LETTERS, v.12, no.4, pp.271 - 273

ISSN
1089-7798
URI
http://hdl.handle.net/10203/89160
Appears in Collection
EE-Journal Papers(저널논문)
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