Energy-efficient uplink training for downlink multi-antenna transmission

被引：0

作者：

机构：

[1] Liu, Xin

[2] Han, Shengqian

[3] Xu, Zhikun

[4] Yang, Chenyang

来源：

Liu, X. (liuxinjlu@ee.buaa.edu.cn) | 1600年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 39期

关键词：

Signal to noise ratio - Antennas - Spectrum efficiency - Time division multiplexing;

D O I：

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学科分类号：

摘要：

The design of uplink training aimed at maximizing the energy efficiency (EE) for time division duplex (TDD) multi-antenna systems was investigated. It was proved that when the channel estimation errors are taken into account, both the upper bounds of EE and spectrum efficiency (SE) are concave functions of the uplink training length, based on which the impacts of signal-to-noise ratio (SNR) and circuit power consumption on the optimal training length were analyzed. Analytical and simulation results show that the EE-oriented optimization reduces to the SE-oriented optimization at high SNR regime. Yet in general scenarios, a longer training signal is necessary to maximize EE compared to that maximizing SE.

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