A Method of Analytical Calculation of SER and BER for APSK Modulation in the Nonlinear Channel with AWGN

Abstract

The paper studies a well-known method of analytical calculation of the upper probability limit of SER and BER for amplitude phase-shift keying (APSK) modulation in the nonlinear channel with additive white Gaussian noise (AWGN). The paper covers an influence of nonlinear amplitude and amplitude-phase (AM/AM and AM/PM) distortions using the Saleh model, appearing in the power amplifier, on the APSK constellation. Thus, a computer model of assessment of SER and BER of the system has been developed. The method of analytical calculation of SER and BER for APSK modulation considering amplitude and amplitude-phase distortions in the nonlinear channel with AWGN has been suggested. A comparison of the results of analytical calculation with the results of a computer simulation has been made. The obtained results of the calculations require significantly less working hours and accurately coincide with the results of computer simulation.