OFDM系统在保护前缀不足时的频域均衡
Frequency - domain Equalization for OFDM Systems with Insufficient Cyclic Prefix
摘要
当正交频分复用(OFDM)通信系统的循环保护前缀(CP)长度小于信道冲激响应长度时,常采用时域均衡方法消除符号间干扰(ISI)和子载波间干扰(ICI)。但时域均衡器结构复杂,且收敛速度较慢。为此,利用OFDM系统的零子载波信息,设计了一种频域均衡器。该均衡器具有稀疏矩阵结构,因此计算量小。理论分析和计算机仿真表明:它能有效消除由于循环前缀不足引起的符号间干扰和子载波间干扰,从而较好地恢复传输信号。
出处
《无线电通信技术》
2003年第6期1-3,共3页
Radio Communications Technology
基金
国家民委重点科研基金(2002ABA003)
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