Software radio structure of slow frequency-hopping system based on GMSK modulation and its performance analysis

GMSK modulation was used in the front part of the software radio structure of solow frequencyhopping system,making use of its good spectrum effciency to realize highspeed data transmission.The transmission and reception model and the digitalisation of the whole system were analysed.Noncoherent demodulation based on Viterbi detection was used for the discontinuity of FH signal.The main module and its BER were analysed with satisfactory results obtained.