Energy Detection Method In Cognitive Radio

Norairin, Mahmat Sani (2013) Energy Detection Method In Cognitive Radio. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Currently, the internet is widely used among users to communicate with each other. Mobile lifestyle and a variety of devices now require multi-band and multiplatform technology be it through wired or wireless. Due to the enhancement system, the use of the internet to become a priority for users from communicating wherever they are, because of the increasing number of users from time to time. This situation has resulted in increasing demand for spectrum and frequency bands become much more crowded. Therefore, the available spectrum is unable to meet the growing needs of consumers. One way to overcome this problem is cognitive radio, which includes several techniques of cognitive radio spectrum detector. Energy detector is one of the spectrum detector techniques that were used. The objective of this project is to produce a BPSK modulation as input to the energy detector to detect the empty spectrum. Through energy detector, the probability of detection ( ), the probability of missed detection ( ), and the thresholds were obtained. The results shown that the detection probability ( ), and the number of channels present that are available were obtained. Besides, the BPSK signal can be generated by using MATLAB software. Through BPSK signal as input signal, the detector energy spectrum can be generated to detect the present channel that are available, where and were obtained. The analysis shown that when the number of samples, N = 8, nearly 44.5% of the channels were fully occupied by primary users. However, this percentage was decreased when the number of samples, N equal to 16 and 32. As the conclusions, the objectives of this project were achieved, where the energy detection capable to detect the present channel with random binary of BPSK modulation.

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