协同分布式天线系统中的自适应比特分配算法

doi:10.3969/j.issn.1001-2400.2013.04.025

J4 ›› 2013, Vol. 40 ›› Issue (4): 149-154.doi: 10.3969/j.issn.1001-2400.2013.04.025

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Adaptive bit partition algorithm in cooperative distributed antenna systems

GUI Xin^1,2;KANG Guixia²;ZHANG Ping^1,2

(1. Beijing Univ. of Posts and Telecommunications, Wireless Technology Innovation Institute, Beijing 100876， China;
2. Key Lab. of Universal Wireless Communications (BUPT), Ministry of Education, Beijing 100876， China)

Received:2012-02-14 Online:2013-08-20 Published:2013-10-10
Contact: GUI Xin E-mail:guixin1234@gmail.com

Abstract

Abstract:

This paper proposes a new limited feedback bit partition algorithm to minimize the rate loss caused by the channel quantization error, based on the cooperative distributed antenna system (DAS). There are two kinds of interferences in multi-user cooperative DAS: multi-user interference (MUI) within the local cell and inter-cell interference (ICI) from adjacent cells. To suppress these two kinds of interferences, this paper uses the random vector quantization (RVQ) codebook to separately quantize the channel state information (CSI) from the local cell and adjacent cells. Under the condition that uses' total feedback overhead is fixed, we use a two-step optimization method to obtain the optimal solution of the feedback bit number allocated to local and adjacent cells. Simulation results show that the proposed algorithm effectively increases the average transmission rate compared with the equal-bit partition algorithm.

Key words: cooperative distributed antenna system, limited feedback bit partition algorithm, random vector quantization

GUI Xin;KANG Guixia;ZHANG Ping. Adaptive bit partition algorithm in cooperative distributed antenna systems[J].J4, 2013, 40(4): 149-154.

References

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Adaptive bit partition algorithm in cooperative distributed antenna systems

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