摘要
文章分析了现有的两种单边带O-OFDM实现方案(滤波法和相移法)的不足,提出了基于频域Hilbert变换法的单边带O-OFDM系统方案,该方案具有实现简单的优点。通过对已有的方案和新方案进行性能仿真分析,得到了如下两点结论:(1)频域Hilbert变换法输出的两支路信号幅度一致性和相位正交性好,镜像频带抑制量比相移法高8dBm。(2)当传输距离大于500km时,频域Hilbert变换法的BER与FIR相移法的BER相比降低10-3量级。
After analyzing the problems existed in the a novel scheme of SSB O-OFDM based on frequency domain present two SSB O-OFDM schemes, this paper proposes Hilbert transform algorithm. This scheme is easy to implementation. Two conclusions are acquired through performance simulation and analysis： Firstly, frequency do- main Hilbert transform can produce I/Q channel with high balance, so mirror frequency rejection quantum is 8dBm more than FIR phase shift method. Secondly, when the transmission distance is above 500 kilometers, BER of frequency domain Hilbert transform method is lower than FIR phase shift method about 10-3.
出处
《空间电子技术》
2010年第3期19-23,共5页
Space Electronic Technology
关键词
色散
相位均衡
正交频分复用
单边带
Dispersion Phase equalization Orthogonal Frequency Division Muhiplexing Single-sideband
