Subchannel and Modulation Joint Selection in MIMO Relay Systems

doi:10.13190/jbupt.201101.45.songl

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2011, Vol. 34 ›› Issue (1): 45-49.doi: 10.13190/jbupt.201101.45.songl

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Subchannel and Modulation Joint Selection in MIMO Relay Systems

Received:2010-01-16 Revised:2010-09-07 Online:2011-02-28 Published:2011-02-28

Abstract

Abstract:

A subchannel and modulation joint selection method is proposed in dualhop relaying multiinput multioutput (MIMO) systems to improve the system throughput and to cut the signaling overhead. Regarded as an equivalent channel, the channel between source and destination is decomposed into multiple parallel independent subchannels by singular value decomposition. The number of the used subchannels and their modulation schemes are selected and feedback jointly in the proposed algorithm. Simulations show that, compared with the traditional method where each subchannel selects modulation scheme independently, the new selection method can achieve higher throughput and use less signaling bits.

Key words: relay, subchannel and modulation joint selection, throughput, signaling, singular value decomposition

CLC Number:

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Subchannel and Modulation Joint Selection in MIMO Relay Systems

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