Minimization the Effect of Different Channel Model on QAM and PAM Systems in Term of Bit Error Rate
Fatima Faydhe AL-Azzawi
Fatima Faydhe AL-Azawi, Received her B.Sc. in Electrical and Electronics from the Faculty of communication Engineering, University of Technology Baghdad, Iraq in 2003, received the M.Sc. degree in engineering from Faculty of communication Engineering, University of Technology Baghdad, Iraq.
Manuscript received on March 03, 2014. | Revised Manuscript received on March 04, 2014. | Manuscript published on March 05, 2014. | PP: 36-39 | Volume-4 Issue-1, March 2014. | Retrieval Number: A2070034114/2014©BEIESP
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Abstract: Quadrature amplitude modulation (QAM) has been widely used in adaptive modulation because of its efficiency in power and bandwidth while Pulse Amplitude Modulation (PAM) used for high rate data link where transmitting more bits is a symbol time, QAM and PAM systems are both tested under AWGN, Rayleigh fading, Rician Fading channels as comparison performance in term of BER between the two systems, to improve the performance of both systems convolutional code, diversity order and K-factor are used, where these techniques decrease the BER on both systems.
Keywords: QAM and PAM, fading channel, Convolutional AWGN channel, QAM in rician channel.