In this letter, we propose a simple but accurate calculation method, that is, an approximate closed-form equation of average bit error rate in DPSK/OFDM systems with post-detection diversity reception over both timeand frequency-selective Rayleigh fading channels. The validity of the proposed method is verified by the fact that BER performances given by the derived equation coincide with those ...

In this paper, we propose a fractional differential equation (FDE)-based approach for the estimation of instantaneous frequencies windowed signals as part signal reconstruction. This is based on modeling bandpass filter results around peaks equations and linking differ-integrator parameters, thereby determining long-range dependence estimated frequencies. We investigated performance proposed wi...

Related DatabasesWeb of Science You must be logged in with an active subscription to view this.Article DataHistorySubmitted: 21 January 2021Accepted: 20 June 2021Published online: 09 September 2021KeywordsKawahara equation, spectral stability, high-frequency instabilities, perturbation methods, dispersive Hamiltonian systems, Stokes wavesAMS Subject Headings35B35, 37K45, 34L05Publication DataIS...

Frequency-dependent attenuation typically obeys an empirical power law with an exponent ranging from 0 to 2. The standard time-domain partial differential equation models can describe merely two extreme cases of frequency-independent and frequency-squared dependent attenuations. The otherwise nonzero and nonsquare frequency dependency occurring in many cases of practical interest is thus often ...