利用AMC和基于信噪比排序的功率分配优化MIMO传输的频谱效率

2015 9th Jordanian International Electrical and Electronics Engineering Conference (JIEEEC) Pub Date : 2015-10-01 DOI:10.1109/JIEEEC.2015.7470742

M. Taki, Sina Jorjani, Ramin Bagheri

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引用次数: 0

摘要

考虑到瞬时误码率(BER)和总功率限制，设计了一种新的MIMO链路平均频谱效率最大化的传输方案。利用自适应调制和编码(AMC)的离散链路自适应来对抗多径衰落，这在实际系统中是可行的。采用ZF接收机，MIMO信道等效为若干条并行的互不干扰链路。与前面提到的实际链路不同，这里考虑的是基于信噪比排序的虚拟链路。基于信噪比排序和总功率约束分配优化功率电平。数值计算表明，与实际链路间功率均匀分配方案相比，该方案的性能得到了显著提高。

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Spectral efficiency optimized MIMO transmission using AMC and power assignment based on SNR ordering

A new transmission scheme is designed to maximize average spectral efficiency in a MIMO link considering instantaneous bit error rate (BER) and total power constraints. Discrete link adaptation using adaptive modulation and coding (AMC) is utilized to combat multipath fading which is implementable in practical systems. ZF receiver is employed by which MIMO channel becomes equivalent to several parallel non interfering links. Instead of the mentioned actual links, virtual links are considered which are ordered based on their SNRs. Optimized power levels are assigned based on SNR ordering provisioning total power constraint. Numerical evaluations show a noticeable performance improvement by the proposed scheme compared to the scheme in which power is uniformly divided among actual links.

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2015 9th Jordanian International Electrical and Electronics Engineering Conference (JIEEEC)

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