Performance analyses of coherent fast frequency-hopping spread-spectrum systems with partial band noise jamming and AWGN

In this paper, the performance analysis of a coherent fast frequency-hopping spread-spectrum (FHSS) system employing binary phase-shift-keying (BPSK) with the presence of partial band noise jamming (PBNJ) and additive white Gaussian noise (AWGN) is extended to multiple hops per signalling interval. The bit error rate (BER) expressions for the coherent maximum likelihood (ML), linear combination (LC) and hard decision majority vote (HDMV) receivers in such systems are derived and validated by the simulation results. It is shown that under the worst-case PBNJ condition the coherent ML receiver offers the optimal performance. The coherent LC receiver is incapable of providing diversity improvement under the worst-case PBNJ condition. In contrast, the coherent HDMV receiver provides significant diversity improvement at moderate signal-to-jamming ratio (SJR).