COMPARATIVE PERFORMANCE ANALYSIS OF PHASE DIVISION MULTIPLEXING TECHNIQUES

Abstract

The Phase Division Multiplexing (PDM) technique developed for more efficient use of communication resources has recently gain popularity in wireless communication systems. The PDM technique contributes to parallel communication with the multi-channel structure it supports. Unlike the FDM and TDM techniques, which are frequently used in wireless communication, the PDM has two and four channel structures and multiplexes the phase of the signal. It is thought that the performance analyses of the proposed 2 and 4-channel structures will give the researchers an idea of which aspects are superior and where they can be used. In this study, phase division multiplexing structures are analysed and comparative performance analysis are performed and the results are shared.

When PDM structures are analysed, it is seen that 2-channel PDM-BPSK, 2-channel PDM-QPSK and 4-channel PDM-BPSK structures have been developed. In order to compare these structures with each other, graphical user interface has been designed by using MATLAB program and constellation diagrams of each structure have been obtained. Simulation studies of these three structures have been performed by using MATLAB / Simulink program. Simulations have been run with the same system parameters and Bit Error Rate (BER) curves have been obtained. Tolerance ranges have been compared over constellation diagrams and bit error rate curves obtained by simulations have been shared.

As a result of the comparing performed in this study; the 2-channel PDM-BPSK structure is the simplest and least energy required structure. The 4-channel PDM-BPSK structure is advantageous with the number of channels it provides, but it needs the most energy. The 2-channel PDM-QPSK stands out with its symbol / bit rate. It also requires an energy value in the energy range of the other two techniques.

Keywords

• PDM-BPSK,PDM-QPSK,phase division multiplexing

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