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IMPLEMENTATION OF DIGITAL QPSK MODULATOR BY USING VHDL / MATLAB

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Author(s): Teena Sakla, | Divya Jain | Sandhya Gautam

Journal: International Journal of Engineering Science and Technology
ISSN 0975-5462

Volume: 2;
Issue: 9;
Start page: 4827;
Date: 2010;
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Keywords: IMPLEMENTATION OF DIGITAL QPSK

ABSTRACT
The modulators are the basic requirement of the communication systems they are designed to reduce the channel distortion & to use in RF communication hence many type of carrier modulation techniques has been already proposed according to channel properties & data rate of the system. Here we are proposing the FPGA based QPSK modulator with analog filters, the proposed system has many advantages over traditional QPSK modulators such as reduced cost, better stability, less complexity. The simulation of the system proves all the features mention above. We have designed the system using VHDL codes in Xilinx & analog filter simulation in Matlab. Three types of filters are investigated. The filters simulation results are compared and presented in this paper.Keywords: QPSK, VHDL, Wavelet Transform, Filters.
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