Comparative Analysis of Different Digital Modulation Techniques on the Basis of Their Bit Error Rate in VHDL

In digital communication system design, the main objective is to receive data as similar as the data sent from the transmitter. It is important to analyze the system in term of probability of error to view the systemʹs performance. Each modulation technique has different performance while dealing with signals, which normally are affected with noise. General explanation for BER is explained and simulated in this paper. It focuses on comparative performance analysis of BPSK, QPSK, 8PSK and 16PSK i.e. Mary PSK system where the value of M=2, 4, 8 and 16. VHSIC Hardware Description Language (HDL) was used for committal to writing of the design. The Xilinx ISE 8.1i tool was used for synthesis of this project. ModelSim PE Student Edition 10.3c is used for functional simulation and logic verification of analog waveforms. The BER curves for different digital modulation techniques which are obtained after simulation are compared with theoretical curves. All the BER calculations are done assuming the channel as AWGN channel.