New Blind Equalization Algorithm with Ability of Modulation Classification Under the Condition of Multipath Propagation

RAO Wei

doi:10.3969/j.issn.0372-2112.2013.07.007

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New Blind Equalization Algorithm with Ability of Modulation Classification Under the Condition of Multipath Propagation

更新时间：2025-07-16

- New Blind Equalization Algorithm with Ability of Modulation Classification Under the Condition of Multipath Propagation
- Acta Electronica Sinica Vol. 41, Issue 7, Pages: 1284-1289(2013)
- 作者机构：
  
  1. 南昌工程学院,江西,南昌,330099
  2. 南昌工程学院,江西,南昌,330099
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61102022);Natural Science Foundation of Education Department of Jiangxi Province (No.GJJ12635);Youth Foudation of Nanchang Institute of Technology (No.2012KJ023, No.2012KJ019)
- DOI：10.3969/j.issn.0372-2112.2013.07.007
  CLC： TN911.5
- Published：2013
- 稿件说明：
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RAO Wei. New Blind Equalization Algorithm with Ability of Modulation Classification Under the Condition of Multipath Propagation[J]. Acta Electronica Sinica, 2013, 41(7): 1284-1289.
DOI：

RAO Wei. New Blind Equalization Algorithm with Ability of Modulation Classification Under the Condition of Multipath Propagation[J]. Acta Electronica Sinica, 2013, 41(7): 1284-1289. DOI： 10.3969/j.issn.0372-2112.2013.07.007.

摘要

常数模盲均衡算法在对非常模信号进行均衡时稳态均方误差不能收敛至零

且不具备信号调制识别能力.因此

依照常数模算法代价函数的构造方法定义了一种余弦代价函数

提出了基于该代价函数的盲均衡新算法.该余弦代价函数可将BPSK、M-PAM、M-QAM信号的不同星座点映射至原点

从而使新算法在对上述常模或非常模信号进行均衡时稳态均方误差均能收敛至零

更重要的是新算法能够在多径衰落环境下实现对上述信号的调制识别.理论分析和仿真结果证明了新算法的优良性能.

Abstract

For nonconstant modulus signals

the steady-state mean square error(MSE)of constant modulus algorithm(CMA)for blind equalization can not converge to zero and CMA can not achieve modulation classification.According to the construction method for CMA's cost function

a cosine cost function is defined and a new blind equalization algorithm based on it is proposed.Such cost function can take all the constellation points of BPSK

M-PAM and M-QAM signals mapped to the origin of constellation diagram

so the steady-state MSE of the proposed algorithm can converge to zero for both of constant modulus and nonconstant modulus signals.Furthermore

for above signals the proposed algorithm has the modulation classification ability under the condition of multipath propagation.Theoretic analysis and computer simulation results demonstrate that the proposed algorithm offers high performance.

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Related Institution

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