Detecting the Order of Multipath Channel Based on FB-CFAR Algorithm

LI Yu; GU Yu-jie; CHEN Kang-sheng

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Detecting the Order of Multipath Channel Based on FB-CFAR Algorithm

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- Detecting the Order of Multipath Channel Based on FB-CFAR Algorithm
- Acta Electronica Sinica Vol. 35, Issue 1, Pages: 175-179(2007)
- 作者机构：
  
  浙江大学信息与电子工程系,浙江,杭州,310027
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN929.5
- Published：2007
- 稿件说明：
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LI Yu, GU Yu-jie, CHEN Kang-sheng. Detecting the Order of Multipath Channel Based on FB-CFAR Algorithm[J]. Acta Electronica Sinica, 2007, 35(1): 175-179.
DOI：

LI Yu, GU Yu-jie, CHEN Kang-sheng. Detecting the Order of Multipath Channel Based on FB-CFAR Algorithm[J]. Acta Electronica Sinica, 2007, 35(1): 175-179. DOI：

摘要

多径信道阶的检测是无线通信参数化信道估计的首要步骤

对系统性能有着重要的影响.然而

目前使用的检测方法大多是基于Akaike信息理论准则(AIC)或最小描述长度准则(MDL)提出的.这些准则在高信噪比条件下性能较好

但在低信噪比时检测性能不好.本文提出了一种基于前后平滑恒虚警率准则(FB-CFAR)的算法来提高信道阶的检测性能.OFDM系统中的仿真结果表明该算法能有效提高低信噪比时多径信道阶的正确检测概率.

Abstract

Detecting the order of multipath channel is the first step of a parametric channel estimator in wireless communication.It is critical to improve the performance of system.However

the methods to estimate the order of multipath are mainly based on Akaike information theoretic criterion (AIC) or minimum description length (MDL).They perform good at high SNR but bad at low SNR.In this paper

an improved constant false alarm rate algorithm based on forward-backward averaging (FB-CFAR) is proposed to detect the order of multipath channel.Simulation results in an OFDM system demonstrate that this algorithm can improve the probability of correct detection at low SNR effectively.

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