1results about How to "Estimated range is large" patented technology

The application discloses a low-orbit satellite Doppler estimation demodulation method and equipment. It relates to high dynamic synchronization technology and is suitable for application in low-orbit satellite communication. The application takes a satellite beacon as a pilot signal, quickly locks the satellite beacon through a phase discrimination method, and extracts a current Doppler frequency shift; then, according to the beacon frequency and the carrier frequency of the symbol rate of the received signal, the Doppler frequency shift of the received signal is determined; finally, through frequency down-conversion, the low symbol rate signal is converted into a baseband signal, and then timing recovery, carrier recovery, demapping and the like are carried out, so as to complete demodulation. The application is suitable for high dynamic conditions of low-orbit satellites, has a large Doppler estimation range and high precision.