Precoding and Power Allocation Based on Double Codebook in MIMO Systems with Limited Feedback

LIU Jian-guo; YANG Lu-xi

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Precoding and Power Allocation Based on Double Codebook in MIMO Systems with Limited Feedback

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- Precoding and Power Allocation Based on Double Codebook in MIMO Systems with Limited Feedback
- Acta Electronica Sinica Vol. 35, Issue 6A, Pages: 78-82(2007)
- 作者机构：
  
  东南大学信息科学与工程学院,江苏,南京,210096
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN92
- Published：2007
- 稿件说明：
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LIU Jian-guo, YANG Lu-xi. Precoding and Power Allocation Based on Double Codebook in MIMO Systems with Limited Feedback[J]. Acta Electronica Sinica, 2007, 35(6A): 78-82.
DOI：

LIU Jian-guo, YANG Lu-xi. Precoding and Power Allocation Based on Double Codebook in MIMO Systems with Limited Feedback[J]. Acta Electronica Sinica, 2007, 35(6A): 78-82. DOI：

摘要

研究表明

有限反馈预编码能有效利用信道信息提高MIMO系统频谱效率

在此基础上

在发射端进行功率控制将使频谱效率得到进一步提升.为了最大化有限反馈MIMO系统的频谱效率

本文提出了一种基于自适应调制的功率分配与预编码方案.为了减少反馈量

该方案通过双码本方式来反馈预编码矩阵和功率控制矢量

并给出了一种基于K-均值聚类的功率码本设计方法.仿真结果表明

该方案的反馈信息量少

且获得了较好频谱性能.

Abstract

Recent research results show that limited feedback precoding proves effective in increasing rrancmiccion rate in the multiple-input multiple-output(NIIMO) system

fiuther performance gain can be achieved if power control is used along with limited feedback precoding at transmitter.In order to maximize the spectral efficiency of the finite-rate feedback MIMO systems

a novel power allocation and precodictg scheme is proposed based on adative modulation.Furthermore

we feed back the preceding matrix and power vector through double codebooks for reducing the feedback overhead

and a new codebook design approach for power vector based on the clustering analysis is developed.Simulation results show that the proposed scheme greatly improves the spectral efficiency with low feedback overfiead

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