example of simulate code matlab for BPSK, QPSK, 8 QAM, square root raised cosine filter

In this project we are simulating code matlab program three modulation schemes; those are namely BPSK, QPSK and 8-QAM.Firstly, we applied Rectangular pulse shaping (RPS) to BPSK, QPSK and 8 QAM. Secondly,we considered BPSK modulation scheme and simulated the system using Square Root Raised Cosine (SQRC) filter as pulse shaping filter and matched filter and we found minimum number of co-efficientsuch that the loss did not exceed 0.5db .Applied same filter to QPSK and 8-QAM and compared the results.We evaluated the coded performance of BPSK, QPSK and 8QAM with SQRC pulse shaping.Finally, we analyzed the transmitted signal spectrum in each case.

1 INTRODUCTION

In digital communication different types of modulations scheme are used to transfer the data from one place to another. Among these modulation schemes the most common modulation schemes are Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying and Quadrature Amplitude Shift Keying (QAM). A brief description of these schemes are as follows.