A Novel Estimation Method for Signal-to-Noise Ratio of OFDM Signal

ZHANG Hai-chuan; LEI Ying-ke

doi:10.13756/j.gtxyj.2016.04.003

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A Novel Estimation Method for Signal-to-Noise Ratio of OFDM Signal

- A Novel Estimation Method for Signal-to-Noise Ratio of OFDM Signal
- Study on Optical communication Issue 4, Pages: 8-11(2016)
- 作者机构：
  
  1. 解放军电子工程学院
  2. 中国电子科技集团第三十六研究所通信信息控制和安全技术重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2016.04.003
  CLC： TN911.23
- Published：2016，
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[1]张海川,雷迎科.一种正交频分复用信号信噪比估计方法[J].光通信研究,2016(04):8-11+41.

ZHANG Hai-chuan, LEI Ying-ke. A Novel Estimation Method for Signal-to-Noise Ratio of OFDM Signal. [J]. (4):8-11(2016)
[1]张海川,雷迎科.一种正交频分复用信号信噪比估计方法[J].光通信研究,2016(04):8-11+41. DOI： 10.13756/j.gtxyj.2016.04.003.

ZHANG Hai-chuan, LEI Ying-ke. A Novel Estimation Method for Signal-to-Noise Ratio of OFDM Signal. [J]. (4):8-11(2016) DOI： 10.13756/j.gtxyj.2016.04.003.

摘要

针对利用传统方法估计OFDM（正交频分复用）信号SNR（信噪比）存在算法复杂度高、步长选取不易确定等问题

提出了一种OFDM信号SNR估计算法。利用相关性函数完成对两种不同保护间隔OFDM信号的判别

并根据不同保护间隔的结构特点

分别提出两种不同的SNR估计方法

最后将判别结果与相应的SNR估计算法相结合

完成对OFDM信号的SNR估计。仿真结果表明

该算法无需辅助数据

计算简单

在不同的SNR条件下均具有较好的识别效果。

Abstract

Aiming at the high computation load and the uncertainty of step chosen in traditional OFDM Signal-to-Noise Ratio（SNR）estimation method

a novel method is proposed to estimate the SNR of OFDM.We firstly use the correlation function to discriminate the two types of guard interval.Then we propose two different methods to estimate the SNR of OFDM signal according to the structure characteristic of two types guard interval.Finally

the result of judgment is combined with the corresponding SNR estimation method to realize the SNR estimation of OFDM.The experimental results show that the proposed method don’t need auxiliary data and the computation load is low with satisfied SNR estimation performance.

关键词

正交频分复用循环前缀相关函数盲识别信噪比

Keywords

OFDMcyclic prefixcorrelation functionblind recognitionSNR

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