COMPARATIVE PERFORMANCE ANALYSIS OF PHASE DIVISION MULTIPLEXING TECHNIQUES

Abstract

The Phase Division Multiplexing (PDM) technique developed for moreefficient use of communication resources has recently gain popularity inwireless communication systems. The PDM technique contributes to parallelcommunication with the multi-channel structure it supports. Unlike the FDMand TDM techniques, which are frequently used in wireless communication,the PDM has two and four channel structures and multiplexes the phase of thesignal. It is thought that the performance analyses of the proposed 2 and 4-channel structures will give the researchers an idea of which aspects aresuperior and where they can be used. In this study, phase division multiplexingstructures are analysed and comparative performance analysis are performedand 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 beendeveloped. In order to compare these structures with each other, graphicaluser interface has been designed by using MATLAB program andconstellation diagrams of each structure have been obtained. Simulationstudies of these three structures have been performed by using MATLAB /Simulink program. Simulations have been run with the same systemparameters and Bit Error Rate (BER) curves have been obtained. Toleranceranges have been compared over constellation diagrams and bit error ratecurves obtained by simulations have been shared.As a result of the comparing performed in this study; the 2-channel PDMBPSKstructure is the simplest and least energy required structure. The 4-channel PDM-BPSK structure is advantageous with the number of channelsit provides, but it needs the most energy. The 2-channel PDM-QPSK standsout with its symbol / bit rate. It also requires an energy value in the energyrange of the other two techniques.