摘要
介绍了一种基于正交频分复用(orthogonal frequency division multiplexing,OFDM)技术的宽带短波数据调制解调器的设计方案。为了消除短波信道的多径衰落现象,将OFDM、带内频率分集和Turbb乘积码用于调制解调器的设计中。在共信道干扰被抑制的前提下,这种数据调制解调器可在带宽为125kHz的短波信道上实现8KB/s、16KB/s和32KB/s的数据传输。对这种宽带调制解调器在典型短波信道中的性能给出了数值仿真结果。
The design method of a kind of wideband HF date modem based on orthogonal frequency division multiplexing (OFDM) is introduced. To overcome the multipath fading in HF channel the OFDM in-band frequency diversity and turbo product code are used in the modem design. Assuming the suppressing of serious co-channel interference this kind of data modem can realize data transmission by rate of 8KB/s, 16KB/S or 32KB/S in HF channel with bandwidth of 125kHz. The numeric simulation result of its performance over typical HF channel is also given.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2003年第12期1565-1568,共4页
Systems Engineering and Electronics
基金
国家自然科学基金(90104019)
