Performance Analysis on Modulation Techniques of W-cdma in Multipath Fading Channel

ACKNOWLEDGEMENTS Our deepest gratitude goes first and foremost to our primary advisor Dr. Tommy Hult, for his constant support and guidance, and patience during the whole period of our thesis. Secondly, we would like to express our heartfelt gratitude to our teachers who instructed us a lot by their constructive suggestions and encouragement. Additionally, our big thanks also go to the department researchers who guide and support us to go in right direction of our thesis. Our thanks would also go to our beloved family for their prayer, encouragement and support. ABSTRACT The transmission from base station to mobile or downlink transmission using M-ary Quadrature Amplitude modulation (QAM) and Quadrature phase shift keying (QPSK) modulation scheme are consider in W-CDMA system. We can analysis the performance of these modulation techniques when the system is subjected to AWGN and multipath Rayleigh fading are consider in the channel. We will use MatLab 7.4 for simulation and evaluation of BER and SNR for W-CDMA system models. We will go for analysis of Quadrature phase shift key and 16-ary Quadrature Amplitude modulations which are being used in wideband code division multiple access system, so that the system can go for more suitable modulation technique to suit the channel quality, thus we can deliver the optimum and efficient data rate to mobile terminal.