摘要
该文提出一种基于频域的幅度两电平的DAPSK+OFDM,并讨论该调制方式在频域的差分调制和解调,然后给出它在白高斯信道的误比特性能公式。最后在典型的调幅(AM)波段信道对它和基于时域的DAPSK+OFDM的误比特性能进行了仿真。结果表明:在短波信道,频域的DAPSK+OFDM比时域的DAPSK+OFDM性能好;在中波信道,时域的DAPSK+OFDM比频域的DAPSK+OFDM性能好。因此,数字调幅广播系统在短波信道可采用频域DAPSK+OFDM。
In this paper, a new frequency-domain DAPSK+OFDM is proposed . Its modulation and demodulation are discussed, and its BER performance is analysed in AWGN channel. In the case of the typical AM channel, the simulation results indicate that the BER performance of frequency-domain DAPSK+OFDM is better than that of time-domain DAPSK+OFDM in Short Wave (SW) channel but poorer in Medium Wave (MW) channel. In short, it is reasonable to use frequency-domain DAPSK+OFDM in SW channel and time-domain DAPSK+OFDM in MW and Long Wave (LW) channel.
出处
《电子与信息学报》
EI
CSCD
北大核心
2002年第4期467-472,共6页
Journal of Electronics & Information Technology
基金
国家自然科学基金(60072013)
关键词
差分幅度相位调制
正交频分复用
频域
Differential amplitude phase shift keying, Quadrature amplitude modulation, Orthogonal frequency division multiplexing, Digital amplitude modulation broadcast
