摘要
针对正交频分复用系统的信道时变会破坏载波间的正交性而导致载波间干扰,提出了一种分段均衡有效的载波间干扰消除方法,其优点是:当采用两段和四段均衡时,在M1225信道模型下,可分别提高接收信噪比6 dB和12 dB,且与标准的均衡方法具有相同的频谱效率。性能分析与仿真验证表明,分段均衡方法能有效地消除频率偏移与信道时变而产生的载波间干扰。
For orthogonal frequency-division multiplexing (OFDM) communication systems, a loss of subcarrier orthogonality due to time-variant multipath channel leads to intercarrier interference (ICI).This paper studies an efficient ICI cancellation method termed segment equalization schemes.The signal-to-interference power rate can be increase 6 dB and 12 dB when the segment size is two or four, and the system has the same spectrum efficiency with standard equalization. Simulations and performance analysis show that OFDM system using the proposed segment equalization can effectively reduce the ICI cause by frequency offset and large doppler frequency shifts in mobile radio channels.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2003年第5期503-507,共5页
Journal of University of Electronic Science and Technology of China
基金
国家863计划资助项目
编号:2002AA712061
关键词
正交频分复用
时变信道
载波间干扰
分段均衡
orthogonal frequency-division multiplexing
time-vary channel
intercarrier interference
segment equalization
