다이버시티 기법을 사용한 위상 동기 FH-SS 시스템의 성능 분석 = Performance Analysis For A Phase-Coherent FH-SS System Using The Diversity Scheme

다국어 초록 (Multilingual Abstract)

Frequency diversity for a phase-coherent frequency-hopping spread-spectrum system is proposed. The frequency band of the communicator is partitioned in to L disjoint subbands on which L replicas of the communicator signal are simultaneously transmitted each signal replica hops independently in its subband. Therefore, both phase continuity and coherent optimal combining of the received replicas are possible. Optimum diversity is thus at least 6dB better than a conventional noncoherent FH-SS system. We show that a smart Jammer should be present in all subbands. We also give a sufficient condition that forces the Jammer to spread its intereference signal on the whole communicator frequency band.