基于MMSE准则自适应预处理算法研究  

Adaptive Algorithm Based on MMSE Criterion

作　　者：秦云[1] 

机构地区：[1]江南大学理学院,江苏无锡214000

出　　处：《无线电通信技术》2007年第5期25-26,46,共3页Radio Communications Technology

摘　　要：自适应OFDM(Orthogonal Frequency Division Multiplexing)系统根据信道情况自适应地分配各个子载波发送的比特和功率,在频率选择性衰落信道条件下,它比传统的OFDM系统有更好的误比特性能。提出了一种基于MMSE准则的自适应预处理算法,并将该算法应用于自适应OFDM系统,与基于最大信息速率设计的自适应OFDM系统相比,误比特性能有了显著提高。Adaptive OFDM（Orthogonal Frequency Division Multiplexing）system can allocate the data rates and transmit power among subcarriers adaptively,and it has better BER（Bit Error Rate）performance than the traditional OFDM system in frequency selective fading channel.This paper proposes an adaptive algorithm based on MMSE criterion,and applies it to adaptive OFDM system.Comparing with adaptive OFDM system adopting algorithm based on maximum information rate,the system outperforms it in BER performance.

关 键 词：自适应OFDM MMSE 自适应预处理算法 

分 类 号：TN929.5[电子电信—通信与信息系统]