基于二元相移键控体制的短波信道快速估计  

Fast estimation of HF channels based on EBPSK scheme

作　　者：姚誉[1] 吴乐南[1] 常虹[1] 

机构地区：[1]东南大学信息科学与工程学院,江苏南京210096

出　　处：《电波科学学报》2013年第3期425-429,447,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(No.61271204)

摘　　要：扩展的二元相移键控(Extended Binary Phase Shift Keying,EBPSK)是一种高效调制方式,而短波通信要面对极为恶劣的传输环境,针对基于冲击滤波器的解调器可将EBPSK的调制信息转化为幅度冲击的特点,提出了基于EBPSK调制和冲击滤波器解调体制的短波信道估计方法.该方法无需复杂的处理过程和专门的训练序列,在通信过程中只发送一个"1"即可在冲击滤波器的输出端得到信道径数、相对于主径的时延、以及各径幅度因子的相对值等必要的信道参数,快速、简单、有效.Extended binary phase shift keying（EBPSK）is an efficient modulation mode, and HF communication is generally under the harsh transmission condition. According to the characteristic that the demodulator based on impacting filters would transform the EBPSK modulating signal into impact amplitude, a new meth- od of HF channel estimation based on EBPSK modulation and impacting filter de- modulation system is put forward. The proposed method needs no complicated process or special training sequence. Only by sending a signal ＂1＂ in communica- tion, it would get the necessary channel parameters from the output of the impac- ting filter, such as the number of multipath fading, the time delay relative to main- path, the amplitude-scaling factor of each path and so on. Finally, the method is verified to be rapid, simple and effective.

关 键 词：EBPSK调制 冲击滤波器 短波信道 信道估计 多径衰落 

分 类 号：TN919.6[电子电信—通信与信息系统]