摘要
设计并仿真带有多普勒频移的时变频率选择性瑞利衰落信道的无线通信系统。该系统基于时间、延迟扩展、带宽、功率、比特率和误码率相干实现无符号间干扰和信道间干扰传输。仿真结果显示,该系统的误比特概率低于规定值。在不同信噪比取值下仿真的误码率接近理论误码率曲线。基于频域重复编码,在时变频率选择性MIMO信道中仿真分集增益。仿真结果显示,在最大比合并分集方式下,与未编码和理论误码曲线相比,编码方式具有更低的平均误码率。
Designs and simulates a wireless communication system over a time varying frequency selective Rayleigh-fading wireless channel with Clarke’s Doppler spectrum.Designs the communication system based on coherence time,delay spread,bandwidth,power,bit rate and bit error rate for ISI-and ICI-free transmission.The result achieved is a bit error probability well below the specified value.The simulated BER for different values of the SNR closely followed the theoretical BER curve.The inherited diversity in a time varying frequency selec⁃tive MIMO channel is exploited using repetition coding in frequency domain.The BER results are compared with uncoded performance and theoretical BER curve for MRC with different diversities.
作者
俞骋
YU Cheng(Ningbo No.2 Technical College,Ningbo 315012)
出处
《现代计算机》
2020年第2期39-43,共5页
Modern Computer
关键词
带多普勒频移的瑞利衰落信道
无线通信系统
误码率
分集
Rayleigh-Fading Channel with Doppler Spectrum
Wireless Communication System
BER
Diversity
