Abstract
At present, most of the hopping frequency spread spectrum (HFSS) communication systems adopt the non-coherent demodulation method regarding the low complexity receiver design, whereas seldom of them adopts the coherent demodulation method. This paper explores the performance boundary of coherent frequency hopping spread spectrum system in terms of slow to fast frequency hopping. Specially, we design a coherent fast frequency hopping communication system, and build its corresponding system model. By adopting the maximum likelihood method, we achieve the coherent maximum likelihood receiver. Furthermore, the BER performance of fast frequency hopping system is analyzed theoretically, where binary phase shift keying (BPSK) is adopted. We use the frequency diversity under partial band noise jam (PBNJ) model and give the closed form solution of BER performance. Finally, the relationship between BER and the number of frequency diversity is analyzed under jamming and non-jamming conditions.
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