Achievable throughput for dual-mode limited-feedback transmit beamforming over temporally correlated wireless channels

Yi Chieh Chang*, Jwo-Yuh Wu, Ta-Sung Lee

*Corresponding author for this work

研究成果: Conference contribution同行評審

摘要

Achieving high system throughput for limitedfeedback communications against the time-varying channel effect is rather crucial in modern mobile system designs. Within the beamforming setup, this paper derives analytic throughput results for both the "more feedback less often" and "less feedback more often" scenarios. More specifically, under the assumptions that (i) the channels over two consecutive time slots follow the first-order Markov model and (ii) in each time slot, reliable feedback of a fixed amount of bits is allowed, the achievable system throughput over two consecutive time slots in both scenarios are characterized. In particular, while the exact throughput is in an integral form, we derive the associated closed-form approximate formulae which facilitate throughput evaluation without resorting to numerical integration. The analytic results also lead to a very low-complexity throughput-based mode selection scheme. Simulation study shows that: (1) the derived closed-form approximation is quite accurate; (2) with the aid of the proposed mode selection method, the throughput performance is robust against the channel temporal variation.

原文English
主出版物標題2010 IEEE 71st Vehicular Technology
DOIs
出版狀態Published - 30 七月 2010
事件2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring - Taipei, Taiwan
持續時間: 16 五月 201019 五月 2010

出版系列

名字IEEE Vehicular Technology Conference
ISSN(列印)1550-2252

Conference

Conference2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring
國家Taiwan
城市Taipei
期間16/05/1019/05/10

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