基于信漏比的多小区协调系统聚类预编码

M. Sadeghzadeh, H. Bahrami, N. Tran
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引用次数: 5

摘要

本文提出了一种适用于下行网络MIMO的基于信漏比最大化的聚类线性预编码方案。与传统技术不同,我们提出的方案能够支持这样一种网络配置,即bts的发射天线数量小于所有用户的天线总数。为此,我们首先提供了单反和总累加率之间的深刻联系。然后开发了一种优化的预编码方案,该方案可以最大化给定输入协方差矩阵的单反。渐近地,基于单反准则得到的预编码器也会导致最大和速率。通过进一步假设每个bts的功率约束(pbpc),开发了最优功率分配方案,以优化单接收天线用户的和速率。数值结果表明,该方法优于基于单反的传统方法。增益是根据和速率和误码率(BER)性能来观察的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Clustered precoding for coordinated multi-cell systems based on signal-to-leakage ratios
In this paper, we propose a novel clustered linear precoding scheme based on the signal-to-leakage ratio (SLR) maximization applicable to downlink network MIMO. Different from conventional techniques, our proposed scheme is capable of supporting a network configuration in which the number of transmit antennas at the BTSs is smaller than the total number of antennas at all users. To this end, we first provide an insightful connection between the SLR and the total sum-rate. An optimal precoding scheme that maximizes the SLR for a given input covariance matrix is then developed. Asymptotically, the precoders obtained based on the SLR criterion also lead to the maximum sum-rate. By further assuming per-BTS power constraints (PBPCs), optimal power allocation schemes are developed to optimize the sum-rate for users with single receive antenna. Numerical results show that the proposed method outperforms the conventional schemes based on SLR. The gain is observed in terms of both the sum-rate and the bit error rate (BER) performance.
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