標題: Bit Allocation and Statistical Precoding for Correlated MIMO Channels With Limited Feedback
作者: Lin, Yuan-Pei
Chen, Hung-Chun
Jeng, Panna
電機工程學系
Department of Electrical and Computer Engineering
關鍵字: Bit allocation;correlated channel;MIMO;precoding;VQ
公開日期: 1-二月-2012
摘要: In this paper, we jointly consider statistical precoding and feedback of bit allocation (BA) for multiple-input-multiple-ouput (MIMO) systems over correlated channels. The proposed system will be termed a BA system. We assume that the statistics of the channel is known to the transmitter and a reverse link of very low rate is available so that the receiver can send back the quantized BA. Based on the statistics of the channel, we derive the statistical precoder so that bounds of the error rate averaged over the random correlated channel are minimized. Due to statistical precoding, the distribution of the BA is highly nonuniform. Treating BA as a vector signal, we quantize it using vector quantization (VQ), which is known to be particularly useful for quantizing signals with nonuniform distributions. As the distribution of BA is taken into consideration in the codebook design, a good tradeoff between performance and feedback rate can be achieved. Simulations show that the combination of statistical precoding and VQ-based quantization for BA leads to good performance with a small number of feedback bits.
URI: http://dx.doi.org/10.1109/TVT.2011.2175011
http://hdl.handle.net/11536/15669
ISSN: 0018-9545
DOI: 10.1109/TVT.2011.2175011
期刊: IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume: 61
Issue: 2
起始頁: 597
結束頁: 606
顯示於類別:期刊論文


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  1. 000300427400015.pdf