摘要
本文提出一种新的频域16DAPSK+OFDM, 并讨论它的频域差分调制和解调,然后在白高斯信道分析它的误比特性能。同时域16DAPSK+OFDM相比, 频域16DAPSK+OFDM可用于信道特性随时间变化更快的应用。 最后,在典型的调幅 (AM) 波段信道对两者误比特性能进行了仿真。结果表明,时域和频域16DAPSK+OFDM都可用于中短波信道。在中波信道, 时域16DAPSK比频域16DAPSK性能要好;在短波信道, 频域16DAPSK比时域16DAPSK性能要好。另外,两者调制和解调的计算复杂度基本一样,且都不需要信道均衡。
A new frequency-domain 16DAPSK+OFDM with its modulation and demodulation is proposed. Simulation has been conducted for BER performance in typical AM channels and the AWGN environment. Simulation results show that both frequency-domain and time-domain 16DAPSK+OFDM can be used in AM channels. In MW channel, performance of 16DAPSK+OFDM for time-domain is better than for frequency-domain; whilst in SW channel, performance for frequency-domain is better than for time-domain. Computational complexity in the process of modulation and demodulation is almost the same for both domains. Moreover, there is no need for channel-equalizer for both domains.
出处
《电路与系统学报》
CSCD
2001年第3期68-71,共4页
Journal of Circuits and Systems
基金
国家自然科学基金资助项目(60072013)
