Implementation of OFDM System Using Software Defined Radio

Abstract

As the technologies grow quickly and the devices and computers become cost-effective and powerful, tracks of research seam to allow a group of new researchers the chance to use and perform experiments on the technologies that were only available to a few people. This is the scenario for wireless communications system technologies.

Now-a-days, computers are being used for the signal processing tasks which were previously done by dedicated devices. Inexpensive computers which we use in our day-to-day lives at home are capable of doing the important computation that these dedicated devices are performing. Software Defined Radio (SDR) is similar to this kind of stuff.

The transformation of the signal processing over some dedicated device into software run by a common PC opens up great potentials at very reasonable price. With the help of the SDR, we can now examine and modify every value of the given communication system.

By doing research on this topic, command on both wireless communication systems and SDR can be gained. With this objective in my mind, I tried to implement the wireless communication system. Because of the enormous advantages of OFDM (Orthogonal Frequency Division Multiplexing), it was selected for implementation. The purpose of this is to analyze the performance of orthogonal frequency division multiplexing using C700 platform of software defined radio. In this paper focused on image transmission in OFDM and test that image using software defined radio (C700 platform). In this paper considers the different aspects specific to the image as data and also provides essential steps to address them. Comparison of different modulation schemes according to the parameters of SNR, BER, percent error of pixels (received image) between the transmitted and received image of the proposed system.