Performance Analysis for M-ARY PSK and M-ARY QAM in Gaussian Noise & Raying Fading with Wireless Mesh Networks

Abstract

As the demand for transmitting variable and high data rates rise, the need to develop more proficient wireless communication systems increases Thesis aims to find issues that may affect the performance of meshed wireless networks. There is no denying the fact that out of the wireless technologies being used in today’s environment, the wireless mesh technology is one of the most advanced and can be viewed as the technology of the future. The main problem with wireless networks is making them security. This area is also considered as it improves the performance of the whole network. Also the network should be scalable to properly utilize the frequency and get optimal performance. This is required for the successful delivery of data packets. In this paper the performance of M ary–QAM and M ary–PSK modulation schemes has been analyzed. In this work the BER (Bit Error Rate) performances is shown analytically and by means of simulation for Rayleigh fading multipath channels and AWGN Gaussian channel for m-ary PSK and m-ary QAM. The performance of Additive White Gaussian Noise (AWGN) channel with Rayleigh fading in terms of BER is compared. The main focus is to investigate how much improvements of BER is occurred using m-ary PSK and m-ary QAM for AWGN channel and Rayleigh fading channel. In order to choose the most suitable modulation, a few criteria such as bit error rate, power efficiency, and bandwidth efficiency are used for evaluation. This work focuses on error performance of phase modulation schemes in different channel conditions and on the method to reduce bit error rates.
INDEX TERMS: WMNS, BER/SER, PSK, MARY, QAM, AWGN, RAYLEIGH FADING CHANNEL