Antenna calibration method for MMSE-based network MIMO system

2015 IEEE/CIC International Conference on Communications in China - Workshops (CIC/ICCC) Pub Date : 2015-11-01 DOI:10.1109/ICCChinaW.2015.7961592

Qiang Liu, Xin Su, Jie Zeng, Lili Liu, Tiejun Lv

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Abstract

In this paper, we propose a new channel reciprocity calibration method based on minimum mean square error (MMSE) in network multiple-input and multiple-output (MIMO) system. Network MIMO system can mitigate the inter-cell interference by joint precoding techniques. The system is assumed to operate in time division duplex (TDD). However, the generalized channeles do not only consist of free-space electromagnetic channel, but also include transceiver modules, the mismatches between the transceiver modules of the antennas destroy the channel reciprocity. Therefore the mismatches should be calibrated before channel reciprocity can be utilized. An effective method for calculating the calibration coefficients in the network MIMO system whose BSs are equipped with multiple antennas is proposed. The network MIMO system is divided into M independent centralized MIMO systems and one distributed MIMO system, then the calibration coefficients of the two systems can be combined to calculate the calibration coefficients of the network MIMO system. The validity of the method is proved by the simulation results.

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基于mmse的网络MIMO系统天线标定方法

在网络多输入多输出(MIMO)系统中，提出了一种基于最小均方误差(MMSE)的信道互易校准方法。网络MIMO系统可以通过联合预编码技术减轻小区间干扰。假定系统工作在时分双工(TDD)中。然而，广义信道不仅包括自由空间电磁信道，还包括收发模块，天线收发模块之间的不匹配破坏了信道的互易性。因此，在利用信道互易之前，必须对失配进行校准。提出了一种计算多天线网络MIMO系统标定系数的有效方法。将网络MIMO系统分为M个独立的集中式MIMO系统和1个分布式MIMO系统，然后将这两个系统的标定系数组合计算网络MIMO系统的标定系数。仿真结果证明了该方法的有效性。

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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来源期刊

2015 IEEE/CIC International Conference on Communications in China - Workshops (CIC/ICCC)

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