基于Turbo均衡的新型短波调制解调器  

New shortwave modem based on Turbo equalization

作　　者：王小军 

机构地区：[1]西安烽火电子科技有限责任公司,陕西西安710075

出　　处：《现代电子技术》2013年第17期89-92,共4页Modern Electronics Technique

摘　　要：短波信道是典型的瑞利慢衰落信道,多径延迟、多普勒频移和选择性衰落均会对短波数据调制解调器产生严重影响,为了更好地利用短波信道来实现高性能数据传输,抵抗多种因素带来的传输误码问题,提出一种基于短交织LDPC编码和Turbo迭代均衡相结合的高性能调制解调技术,并通过算法推衍、波形设计、仿真验证等过程论证了算法适用性及波形合理性,具有很高实用价值,可在数字短波通信设备上推广应用。The shortwave channel is a typical Rayleigh slow fading channel. The performance of shortwave data modem can be seriously affected by multiple path delay, Doppler frequency shift and selective fading. In order to realize the high-perfor-mance data transfer by short wave channel, and avoid the transmitting bit errors caused by various factors, a high-performance modem technology is proposed, which is based on the combination of short interleaved LDPC encoder and Turbo iteration equaliza-tion. The feasibility of the algorithm and the rationality of the waveform are proved by equation derivation, waveform design and simulation. The results show that the proposed algorithm has high practical value, and can be applied to data shortwave commu-nication equipments.

关 键 词：低密度奇偶校验码 TURBO均衡 软输入软输出 短波数据 

分 类 号：TN763-34[电子电信—电路与系统]