Details

Autor(en) / Beteiligte

• Tairan Wang
• Cano, A.
• Giannakis, G.B.
• Laneman, J.N.

Titel

High-Performance Cooperative Demodulation With Decode-and-Forward Relays

Ist Teil von

• IEEE transactions on communications, 2007-07, Vol.55 (7), p.1427-1438

Ort / Verlag

New York, NY: IEEE

Erscheinungsjahr

2007

Quelle

IEEE Xplore

Beschreibungen/Notizen

• 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 a high-performance low-complexity coherent 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 coherent demodulator can achieve the maximum possible diversity, regardless of the underlying constellation. Its error performance tightly bounds that of maximum-likelihood (ML) demodulation, which provably quantifies the diversity gain of ML detection with DF relaying. Simulations corroborate the analysis and compare the performance of the novel decoder with existing diversity-achieving strategies including analog amplify-and-forward and selective-relaying.