No abstract

The results of imitational simulation of detection OQPSK and 8PSK signals in wireless channel with low signalto-noise ratio are given in this paper. The simulation was maintained using Matlab program. The main goal of experiment is to confirm the efficiency of modified phase detector, in which specific combination of narrowband filters was used. The results of comparing quality indexes of modified detector and classical detector were illustrated on BER-to-SNR diagrams.

This article presents the results of the research of noiseimmunity of wireless communication systems using signals that are formed on the basis of eight-position quadrature-amplitude modulation (8-QAM) and eight-position amplitude modulation of many components (8-AMMC). The research was conducted using simulation of a wireless communication system, built using a detector, implemented on the basis of a phase locked loop. The influence of phase locked loop parameters on the detection quality of these signals in the condition of the interference in the communication channel was researched, and a comparative analysis of the noise immunity of wireless communication systems using these signals was carried out.