The invention discloses an anti-interference DS-GMSK receiving method and an anti-interference DS-GMSK receiving device suitable for
satellite communication, and belongs to the technical field of
satellite communication. The DS-GMSK has the advantages of a
direct sequence spread spectrum system, works in a low
signal-to-
noise ratio environment, and is high in anti-interference capability; and meanwhile, the characteristics of high
GMSK modulation spectrum
utilization rate and low out-of-band
radiation power are combined, so that the spectrum
utilization rate is improved and the out-of-band
radiation is reduced while the anti-
noise and anti-interference capabilities are enhanced. By using FFT and IFFT operations, the operation efficiency of a capture and
demodulation algorithm is significantly improved, and the anti-interference DS-GMSK receiving method suitable for
satellite communication is more applicable to implementation of an FPGA platform. The anti-interference DS-GMSK receivingdevice comprises a down-conversion module, a
frequency offset compensation module, a code phase tracking adjustment module, a capture module and a dispreading
demodulation module. According to the anti-interference DS-GMSK receiving method and the anti-interference DS-GMSK receiving device, the DSSS and the GMSK are combined, the anti-
noise and anti-interference capabilities are enhanced, the spectrum
utilization rate is improved, the out-of-band
radiation is reduced, and the method and the device have a wide application prospect in the field of satellite communication.