Abstract

This paper is proposed an enhancement for forward link channel of CDMA2000-1x system by using 32QAM and 64QAMbased on SDR technology by using FPGA. The Simulink HDL Coder has been used for converting the MATLAB-Simulink models to VHDL language. The verification of the generated VHDL code has been done using Altera- ModelSimprogram, while the synthesis reports and board programming files have been obtained using the Quartus IIprogram. System implementation has been done using FPGA technology with Altera Cyclone II boards. The implementation of the forward link channel by using Simulink HDL coder shows feasibility and flexibility in solving the problem of complex multiplication of complex spreading code also the practical results were closed to that obtained from ModelSimprogram. The results show that the forward link channel of CDMA2000 with 32QAM and 64QAM is a suitable technique to increase the data rate up to 2Mbps in the presence of AWGN and Rayleigh fading channel. However the results of simulation for forward link channel of CDMA2000 system shows improvement when using three levels of codes (LPNC, Walsh code and complex coding) within (0.5-3.2) dB in the presence of AWGN and Rayleigh fading channel. MATLAB (2009) is used for simulation of the proposed system in the presence of AWGN and Rayleigh fading channel

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The article was added to IASJ on 2013-09-29

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