Indian Journal of Science and Technology

Abstract

In cellular communication, spectrum is always a major constraint, but still a large bandwidth (more than two third of the available) is wasted due to the improper utilization, affecting the QoS (Quality of Services) of the system. The spectrum can be used in a better manner, if ideal bandwidth is available without any interference. This work is focused on integration of Cognitive Radio (using energy detection) with different OFDM frameworks to analyze the utilization of spectrum more efficiently. The present work is thoroughly analyzed and implemented by using a MATLAB. Probability of detection (Pd) vs. Probability of false alarm (Pfa), Pd vs. Signal to Noise Ratio (SNR) and Bit Error Rate (BER) vs. SNR for each OFDM framework with energy detector is calculated and analyzed. Different OFDM framework with energy detection can be one of the most promising technologies for next generation cellular communication with better spectrum utilization, enhanced data rate, reduced interference and better QoS.

Keywords: Cognitive Radio, CP, Energy Detection, OFDM, Spectrum Sensing