摘要
在高速数据传输环境下,多径传播使得CDMA系统中的多址干扰(MAI)和码片间干扰(ICI)变得非常严重。本文利用最速下降法和快速傅立叶变换,提出一种码分导频CDMA系统中低复杂度自适应MMSE均衡器设计方法。在运算量大大降低的前提下,计算机仿真表明,本文提出的低复杂度自适应MMSE均衡器的性能接近于理想的码片级MMSE均衡器。
In the high data rate transmission, multiple access interference (MAI) and inter-chip interference (ICI) in the CDMA systems become serious because of the multi-path propagation. A low complexity code-multiplexed pilot aided adaptive MMSE equalization for CDMA systems is proposed based on the method of steepest decent and Fast Fourier Transform (FFT). Under the condition that the computational complexity decreases considerably, computer simulation has shown that the performance of proposed low complexity adaptive MMSE equalization approaches the ideal non-adaptive equalizer.
出处
《电路与系统学报》
CSCD
北大核心
2010年第2期33-38,共6页
Journal of Circuits and Systems
基金
国家自然科学基金(0772067)