摘要
该文提出了降低CDMA下行重叠剪切(OC)法频域均衡接收机计算复杂度的方法。基于FFT/IFFT变换的频域均衡算法,可以将均衡器简化成单抽头的结构,复杂度大大低于时域均衡算法。通过分析OC法频域均衡接收机系统固有误差的产生原因和分布特点,提出了对OC法的改进方法。理论分析和仿真结果都表明:改进后的频域均衡接收机,在计算复杂度降低的情况下,可以取得比原有频域均衡算法更好的性能。
A modification is proposed to reduce the complexity of Overlap-Cut （OC） method Frequency Domain Equalization （FDE） in Code Division Multiple Access （CDMA） downlink systems. FDE based on Fast Fourier Transform/Inverse Fast Fourier Transform （FFT/IFFT） carries out single-tap equalization on received signal, moreover, its complexity is much lower than its time-domain counterpart. The analysis for the generation and the distribution of the inherent error of OC method FDE indicates some improvement to the equalizer. As a result of both theoretical analysis and simulation, a better performance is obtained with lower computation burden than conventional algorithms.
出处
《电子与信息学报》
EI
CSCD
北大核心
2008年第9期2178-2181,共4页
Journal of Electronics & Information Technology
关键词
CDMA
频域均衡
循环卷积
线性卷积
重叠剪切法
Code Division Multiple Access （CDMA）
Frequency Domain Equalization （FDE）
Circular convolution
Linear convolution
Overlap-Cut （OC） method
