REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

COMPARISON OF THEORETICAL PROBABILITY error and the BER SIMULATION OF QPSK AND QFSK modulation

Milan Moskovljević

Technical Test Center, Belgrade, moskva984@gmail.com

Mihajlo Stefanović

Electronic faculty, Niš, mihajlo.stefanovic@elfak.ni.ac.rs

PREDRAG RAKONJAC

Technical Test Center, Belgrade, elektronika@toc.vs.rs

Abstract: This paper presents comparison the two modulation techniques QPSK and QFSK according to the theoretical probability of bit errors and the simulation values of BER in communication systems with additive white Gaussian noise (AWGN) and the optimal receiver that is modeled in Matlab Simulink.

Keywords: QPSK, QFSK, BER, bit error probability, Matlab Simulink.