短波信道调制解调过程中的关键技术研究

Research on Key Technologies in the Modulation and Demodulation of Short Wave Channel

为解决短波通信过程中信号衰减和多径问题,提升短波信号传输质量和稳定性,分析了短波调制解调中的同步接收、频偏估计、信道稀疏化以及Turbo均衡等关键技术,对短波信道进行数据建模,介绍了短波调制解调技术的体制结构。

In order to solve the problem of signal attenuation and multipath in HF communication and improve the quality and stability of HF signal transmission,the key technologies of HF modulation and demodulation,such as synchronous reception,frequency offset estimation,channel sparseness and Turbo Equalization,are analyzed.The data modeling of HF channel is carried out,and the system structure of HF modulation and demodulation technology is introduced.