Abstract
Cooperative communication systems using various relay strategies can achieve spatial diversity gains, enhance coverage and potentially increase capacity. For the practically attractive decode-and-forward (DF) relay strategy, we derive an efficient demodulator at the destination in the form of a weighted combiner. The weights are selected adaptively to account for the quality of both source-relay-destination and source-destination links. Analysis proves that the novel demodulator can achieve the maximum possible diversity, regardless of the underlying constellation. Its error performance tightly bounds that of maximumlikelihood (ML) demodulation which provably quantifies the diversity gain of ML detection with DF relaying. Simulations corroborate our theoretical analyses and compare performance of the novel decoder with existing diversity-achieving strategies including analog amplify-and-forward and selective-relaying.
Original language | English (US) |
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Title of host publication | Conference Record of The Thirty-Ninth Asilomar Conference on Signals, Systems and Computers |
Pages | 1051-1055 |
Number of pages | 5 |
Volume | 2005 |
State | Published - Dec 1 2005 |
Event | 39th Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States Duration: Oct 28 2005 → Nov 1 2005 |
Other
Other | 39th Asilomar Conference on Signals, Systems and Computers |
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Country/Territory | United States |
City | Pacific Grove, CA |
Period | 10/28/05 → 11/1/05 |