Performance analysis of Compressive Modulation scheme in Digital Communication

Wireless communication system, gives good performance only when the selection of modulation process is best. Generally, to chose the particular modulation schemes different parameters are taken into consideration i.e. bandwidth efficiency, bit error rate, signal to noise ratio, cost, effectiveness and easy implementation, but since from very long time bandwidth efficiency is that parameter which plays important role in choosing any modulation scheme. As the waveform of all existing modulation scheme is separated in time domain which makes it difficult to improve their bandwidth efficiency. Since, from last decade researchers are continuously trying to overcome this problem and finally, they were able to discover such a technique which is able to reconstruct the original signal form aliasing environment named as compressive modulation (CM). The working principle of CM has a key part called compressive sensing, by the help of this former one is able to have larger bandwidth efficiency than our modulation techniques. In this paper, we proposed superior Compressive modulation technique and its comparative analysis with QPSK in regard of bandwidth efficiency and BER .The simulation results and theoretical analysis shows that CM has greater bandwidth than QPSK even at high as well as low SNR.