摘要
为了抑制多径衰落造成的符号间干扰 ,提高宽带码分多址 (WCDMA)系统的吞吐量 ,提出了一种多径干扰消除(MPIC)算法。在对原有的 MPIC算法性能进行理论分析的基础上 ,提出了对相邻的两级迭代输出再进行最大比合并 ,可以得到最佳的分集增益 ,因而具有比传统的 MPIC更强的多径干扰抑制效果。仿真结果表明 ,这种基于级间最大比合并的 MPIC算法 (MRC- MPIC)的误比特率明显优于传统的MPIC算法。当输入信噪比好于 15 d B时 ,级间最大比合并带来的系统性能增益在 3d
A novel multipath interference cancellation (MPIC) algorithm was developed to suppress the inter-symbol interference caused by multipath fading and to increase the throughput of wideband code division multiple access (WCDMA) systems. A theoretical analysis of the conventional MPIC algorithm show that the maximum-ratio combining of two successive stages' outputs offers the optimal diversity gain with higher suppression of the multipath interference than the conventional MPIC. Simulation results show that the bit-error-rate of this MPIC using inter-stage maximum-ratio combining (MRC-MPIC) is much better than that of the conventional MPIC. Inter-stage maximum-ratio combining can yield a performance gain higher than 3 dB when the input signal-to-noise ratio is above 15 dB.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第6期843-846,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目 ( 90 2 0 40 0 1)
关键词
移动通讯
宽带码分多址
多径干扰消除
最大比合并
mobile communication
wideband code division multiple access (WCDMA)
multipath interference cancellation (MPIC)
maximum ratio combining
