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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...
In multi-antenna multiuser downlink systems, an adaptive feedback scheme is proposed which is more efficient in Rician channels. First, a new concept of the angle distance distribution is introduced. Based on this theory and channel statistic information at the transmitter, we propose a limited feedback scheme in which the quantization codebook can be more close to the channel direction for each user...
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