MIMO-OFDM系统中有限反馈KL域压缩感知研究

Hongliang Fu, Lianf Chao
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引用次数: 0

摘要

为了解决MIMO-OFDM系统中的反馈链路开销问题,提高传输效率,提出了一种基于KL域的有限反馈方法。该方法将接收端在KL域进行信道估计得到的状态信息进行稀疏处理。从而得到代表信道总状态信息的少量线性测量值,然后将这些测量值反馈到发送端。在发射机中,通过正交匹配追踪算法重构信道状态信息。仿真结果表明,所提出的基于KL (Karhuner-Loeve)域方法的有限反馈能够达到全信道状态反馈效果,降低了反馈环节的开销。
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Research on compressed sensing of KL domain with limited feedback in MIMO-OFDM system
In order to solve the problem of feedback link overhead in MIMO-OFDM system, and improve the transmission efficiency, a limited feedback method based on KL domain is proposed in this paper. In this method, the state information which is obtained from the channel estimation performed in KL domain sparse at the receiving end. Thereby a small amount of linear measurements are obtained which represents the total channel state information, Then these measurements are fed back to the transmitting end. In the transmitter, the channel state information is reconstructed through orthogonal matching pursuit algorithm. The simulation results show that the proposed limited feedback based on KL (Karhuner-Loeve) domain method can achieve full channel state feedback effect and decreases the overhead in the feedback link.
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