摘要
介绍了用于多速率ＢＰＳＫ／ＤＢＰＳＫ软件化解调中的一种多普勒频偏矫正方法．该方法综合利用频率扫描和ＡＦＣ环及ＰＬＬ等频偏矫正方法，能有效估计和矫正达几十倍甚至几百倍码速的频偏，并能兼顾不同的码速和ＢＰＳＫ，ＤＢＰＳＫ两种不同的调制方式，从而解决了在多速率ＢＰＳＫ／ＤＢＰＳＫ信号软件化整体解调过程中多普勒频偏的矫正问题．将该方法用于多速率ＢＰＳＫ／ＤＢＰＳＫ信号软件化整体解调的计算机仿真实验，收到了良好的效果．
A Doppler frequency shift estimation and correction algorithm in multi-rate BPSK/DBPSK system is proposed.It concentrats on the typical frequency shift correct algorithms as frequency scanning,AFC loop and PLL .By using this new algorithm,the frequency shift that is more than hundreds of times of the bit rates can be corrected effectively.The algorithm is suitable to different bit rates (from hundreds of bps to hundreds of kbps) in BPSK/DBPSK sysyem.It is a good solution to Doppler frequency shift correction in multi-rate BPSK/DBPSK system.It has been shown by computer simulations,that the method can correct frequency shift of different bit rates in BPSK/DBPSK system effecively and rapidly.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第2期193-197,共5页
Journal of Sichuan University(Natural Science Edition)
