Performance of Analog Feedback in Closed-Loop Transmit Diversity Systems

被引：0

作者：

Chiu, Eddy ^{[1
]}

Ho, Paul ^{[1
]}

Kim, Jae Hyung ^{[2
]}

机构：

[1] Simon Fraser Univ, Sch Engn Sci, Burnaby, BC V5A 1S6, Canada

[2] Changwon Natl Univ, Sch Mech Engn, Chang Won 641773, South Korea

来源：

2006 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC 2006), VOLS 1-4 | 2006年

关键词：

transmit diversity; CSI feedback; analog feedback; position dependent modulation;

D O I：

暂无

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper is concerned with the efficient transmission of channel state information (CSI) in the uplink, and data in the downlink, of a closed-loop transmit diversity system. Two ideas were explored: 1) the employment of analog CSI feedback whereby estimates of the downlink complex gains were fed back periodically to the base-station at a rate of only 1 analog symbol per estimate per frame, and 2) the use of position dependent modulation (PDM) to counter the signal-to-noise ratio variation across a downlink data frame. Simulation results indicated that as far as the bit-error-rate (BER) is concerned, analog feedback is superior to digital feedback because it does not experience unrecoverable quantization errors in the feedback channel estimates. The simulation also indicated that at a given target BER, PDM can attain a substantially higher throughput than fixed modulation.

引用

页码：1227 / 1232

页数：6

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