Adaptive equalization for DS-CDMA multi-user communication system based on adaptive Laguerre lattice filter
Adaptive equalization for DS-CDMA multi-user communication system based on adaptive Laguerre lattice filter
复制标题
基于自适应拉盖尔格滤波器的DS-CDMA多用户通信系统自适应均衡
DOI：
10.1109/iccas.2010.5670099
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
C. Benjangkaprasert
中科院分区：
文献类型：
--
作者：
A. Charoenphol;M. Lertwatechakul;C. Benjangkaprasert
本文提出了一种基于Laguerre格型滤波器和递归最小二乘（RLS）自适应算法的DS-CDMA系统自适应均衡器。多径传播会引起码间干扰，破坏码的正交性，从而产生多址干扰。因此，本文的目标是最大限度地减少ISI的影响与长脉冲响应环境的基础上提出的接收机。由于Laguerre结构的稳定性，它具有有限脉冲响应（FIR）滤波器和无限脉冲响应（IIR）滤波器的共同特点，而格型滤波器的低灵敏度是其吸引人的特点。因此，我们提出了基于自适应拉盖尔格型滤波器的自适应均衡，以改善接收机的误比特率（BER）性能。仿真结果表明，该接收机在误码率和稳定性方面的性能优于传统的拉盖尔滤波器和FIR滤波器接收机。
This paper deals with an adaptive equalizer based on Laguerre lattice filter and the recursive least square (RLS) adaptive algorithm for direct sequence-code division multiple access (DS-CDMA) communication system. Intersymbol interference (ISI) arises due to multipath propagation, which destroys the code orthogonality, gives rise to multiple access interference(MAI). Therefore, the objective of this paper is to minimize the effect of ISI with a long impulse response environment based on the proposed receiver. Because of the stability of Laguerre structure is sharing the characteristic of finite impulse response (FIR) filter and infinite impulse response (IIR) filter and the low sensitively of lattice filter is an attractive characteristic. Therefore, we propose the adaptive equalization based on adaptive Laguerre lattice filter for improve the bit error rate (BER) performance of the receiver. Our simulation results show that the performance of the proposed receiver in terms of BER and the stability are better than the conventional Laguerre filter and FIR filter receivers.