Efficient Software Defined Radio Using OFDM for High Data Rate Transmission

摘要

This paper presents a software defined radio using Ofdm for high data rate transmission. to demonstrate the concepts of SDR we use a low power fixed-point digital signal processor. for reducing the complexity we use only two operational modes BPSK and QPSK .the adoptability nature using these two modes of OFDM system is discussed. Here we use a straight line method for getting fewer clock signals and this method employs radix-2 decimation-in-time fast Fourier Transform (FFT) algorithm. And for more security we use encryption key at the transmitter and decryption key at the receiver.