Design and Development of Graphical User Interface (GUI) for Communication Link with PSK Modulation using Adaptive Equalization

Abstract: Due to the scarcity of the frequency spectrum, we usually filter the transmitted signal to limit its bandwidth. So, that efficient sharing of the frequency resource can be achieved. Moreover, many practical channels are band-pass and, in fact, they often respond differently to inputs with different frequency components, i.e., they are dispersive. The resulting interference, inter-symbol interference (ISI), degrades the error performance of the communication system. There are two major ways to mitigate the detrimental effect of ISI. The first method is to design band-limited transmission pulses which minimize the effect of ISI. The second method is to filter the received signal to cancel the ISI introduced by the channel impulse response. This approach is generally known as equalization. In this paper we have adopted adaptive equalization technique to reduce ISI and have compared with the existing techniques. Also, we a graphical user interface (GUI) has been developed for making the work user friendly so that everyone can use it with ease.

Keywords: MATLAB, Adaptive Equalization, Inter-symbol Interference (ISI), Graphical User Interface (GUI).