Circuits, Communications and Systems, Pacific-Asia Conference on (2009)
May 16, 2009 to May 17, 2009
A new limited feedback scheme over Rician channels is proposed in multi-antenna multiuser downlink systems. By introducing angle distance distribution in the Rician channel, the scheme designs the quantization codebook which is closer to the channel direction for each user. Moreover, the proposed scheme can adapt the number of feedback bits to the channel condition without increasing the quantized error. The simulation results show that the proposed scheme outperforms Random Vector Quantization schemes both on increasing throughput and on decreasing feedback overhead in Rician channels.
multi-antenna multiuser downlink system; Rician channel; zero forcing beamforming; limited feedback; random vector quantization; quantized error
H. Yang and L. Qiu, "Limited Feedback Technique of MU-MISO System over Rician Fading Channels," 2009 Pacific-Asia Conference on Circuits, Communications and Systems (PACCS 2009)(PACCS), Chengdu, 2009, pp. 62-65.