关键词: 中继, 子信道和调制方式联合选择, 吞吐量, 信令, 奇异值分解

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