A correctin scheme for doppler frequency shift in LEO mobile satellite communication systems

摘要

A novel DBPSK demodulation scheme is proposed in this pape rfor LEO mobile satellite communicaiton systems,which is potentially robust to a large and time variant frequency offset caused by Doppler effect and is insensitive to swift frequency swing-Moreover,it is also robust to a large and drastic envelope undulatin caused by fading and shadowing effect for various environment conditions.Based on comoputer simulations,we evaluate the BER performance of this scheme and draw the conclusions.