摘要
研究了用于正交频分多路复用自适应阵列接收的低复杂度、次最优频域处理技术,提出了一种新的子载波分组级联信道估计与均衡的两级阵列接收信号处理方案.该方法在子载波分组波束形成信号处理后,级联了波束形成后信道估计与均衡处理,通过减少子载波分组数目以大幅降低计算复杂度,增加低复杂度的波束形成后均衡处理来维持或提高性能,取得了系统性能与计算复杂度之比的提高,并且在频率选择性信道通信环境下,具有更鲁棒的性能.
This paper studied low complexity and sub-optimal frequency-domain processing method for orthogonal frequency division multiplexing （OFMD） adaptive array system, and proposed a novel two-stage signal processing scheme, which combines sub-carries grouping with channel estimation and equalization. The difference of the proposed method from the full adaptive beamforming method and sub-carriers grouping beamforming architecture is that a post beamforming channel estimation and equalization processing are added after the received signals are processed by the sub-carriers grouping beamformer. The presented method lowers dramatically the computing complexity through lowering the number of sub-carriers grouping, and mitigates the performance degradation through post beamforming channel equalization. The novel method achieves high performance to complexity ratio and robust performance to frequency selectivity wireless channels. The numerical simulations show the improved performances in application to wireless local area networks through various wireless channels.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2006年第1期66-71,共6页
Journal of Shanghai Jiaotong University
关键词
正交频分多路复用
自适应阵列
波束形成
信道均衡
orthogonal frequency division multiplexing （OFDM）
adaptive antennas array
beamforming
channel equalization
