Performance analysis of non-coherent DPSK receivers for medium data rate EHF frequency hopping systems .1. Analytical analysis of N-DPSK receivers .2. Simulations analysis of N-DPSK receivers

This paper presents a new DPSK receiver matched to slow frequency-hopping and perturbated channels in the EHF band. Performance obtained with this non-coherent receiver are improved compared to the classical DPSK demodulator, either under thermal noise or partial-band noise jamming (PBNJ). This new receiver uses different metrics to improve the performance in terms of the BER under PBNJ. It is shown that this receiver can be very performant by using an L diversity associated with the frequency-hopping system. This is true particularly in the EHF band where the assumption that the jammed band is small (<0.5) compared to the hopping bandwidth. Moreover, this paper proposes the design of a square-law linear combining diversity detector (SLD) with an automatic gain control (AGC) which is very efficient to combat partial-band jammer. This receiver can work with any number of symbols per hop without increasing the design complexity.