Superposition based direct downlink channel state information feedback method

XU Dao-feng 1; HUANG Yong-ming1; YANG Lv-xi1

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Superposition based direct downlink channel state information feedback method

更新时间：2024-10-14

- Superposition based direct downlink channel state information feedback method
- Vol. 30, Issue 1, Pages: 62-69(2009)
- 作者机构：
  
  1. 东南大学信息科学与工程学院
  2. 中国电子科技集团第二十八研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.3
- Published：2009
- 稿件说明：
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XU Dao-feng 1, HUANG Yong-ming1, YANG Lv-xi1. Superposition based direct downlink channel state information feedback method[J]. 2009, 30(1): 62-69.
DOI：

XU Dao-feng 1, HUANG Yong-ming1, YANG Lv-xi1. Superposition based direct downlink channel state information feedback method[J]. 2009, 30(1): 62-69. DOI：

摘要

提出一种低代价下行信道信息实时反馈方法

它将上行的信息序列与下行的信道信息叠加后上传

而不必为下行信道信息分配单独的系统资源。在保证信息序列误码性能及下行信道信息估计精度的前提下

牺牲一部分上行信息序列的误码性能以换取高的频谱利用率。由于对下行信道信息进行了扩频处理

故即使分配较低的能量也能在基站侧进行可靠地恢复。仿真实验证明了这种方法的有效性。

Abstract

A low cost

real-time feedback method for downlink channel state information （DL-CSI） was proposed. DL-CSI was superimposed with uplink user sequences （UL-US） before transmission and thus exclusive occupation of system resources could be avoided. With guaranteed UL-US SER performance and DL-CSI estimation accuracy

higher spectral efficiency could be achieved by sacrificing some UL-US’s symbol error rate （SER） performance. Due to spreading processing

DL-CSI could be accurately recovered even with little allocated energy. Simulations demonstrated the practicability of the proposed method.

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