User and Transmit Antenna Selection for MIMO Broadcast Wireless Channels with Linear Receivers

M. Khan, R. Vesilo, L. Davis, I. Collings
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引用次数: 12

Abstract

This paper considers a signalling scheme for a multi-user wireless broadcast system where the base station has multiple transmit antennas and users can have multiple receive antennas. Independent data streams are transmitted in this system by allocating different transmit antennas to different selected users where multiple transmit antennas may be allocated to each selected user. The signalling scheme is used to select the particular users to receive data in a transmission block and to allocate transmit antennas to those users. We examine two partial feedback schemes for selecting users: one that we call norm-based and the other that we call SINR-based. We also present a novel transmit-antenna selection scheme for allocating multiple transmit antennas to selected users based on the Gram-Schmidt orthogonalisation algorithm. The signalling scheme presented in this paper reduces the amount of channel information required by the base station. We study the performance of the user selection and transmit-antenna selection schemes when linear receivers are used at the receiver side for decoding the transmitted signal. In particular, we consider zero-forcing (ZF) and minimum mean square-error (MMSE) receivers. We examine the sum capacity performance of the system compared to schemes with no feedback and using random antenna selection. We show that the best performance is achieved with norm-based user selection, Gram-Schmidt antenna selection and MMSE receivers.
带线性接收器的MIMO广播无线信道的用户和发射天线选择
本文研究了一种多用户无线广播系统的信令方案,其中基站有多个发射天线,用户可以有多个接收天线。本系统通过向不同的选定用户分配不同的发射天线来传输独立的数据流,其中每个选定用户可分配多个发射天线。信令方案用于选择特定用户来接收传输块中的数据,并为这些用户分配发射天线。我们研究了选择用户的两种部分反馈方案:一种我们称之为基于规范的,另一种我们称之为基于sinr的。我们还提出了一种新的基于Gram-Schmidt正交化算法的发射天线选择方案,将多个发射天线分配给选定的用户。本文提出的信令方案减少了基站所需的信道信息量。我们研究了当接收端使用线性接收器解码发射信号时,用户选择和发射天线选择方案的性能。我们特别考虑了零强迫(ZF)和最小均方误差(MMSE)接收器。我们将系统的总容量性能与无反馈方案和随机天线选择方案进行了比较。结果表明,基于规范的用户选择、Gram-Schmidt天线选择和MMSE接收机可以获得最佳性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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