Analysis and Verification on High Dynamic Doppler Frequency Shift Effect of WiFi Space-Ground Communication

WiFi is the most widely used wireless communication technology in recent years, and satellite space communication has the characteristics of wide coverage. The article proposes a scheme for space-ground communication based on the application of WiFi technology, and analyzes and verifies the effect of high dynamic Doppler frequency shift on WiFi signals by using 802.11b protocol. It is believed that the high dynamic Doppler frequency shift will not affect the bit error rate based on 802.11b protocol for low orbit satellite space-ground communication. Besides, the scheme of onboard WiFi broadcasting and silent monitoring ground terminal devices can avoid the problem of frame filtering (MAC address constraints) in the WiFi protocol, and can achieve one-way communication from space to ground.