SIMULATION AND ANALYSIS OF SPECTRUM SENSING IN COGNITIVE RADIO

摘要

To satisfy future bandwidth demands, existing Cognitive Radio with Wireless Communication must be upgraded to make the best use of the bandwidth. The IEEE 802.22 standard's principal goal is to identify unoccupied spectrum bands in the Digital television channel (DTV) and use them for wireless rural broadband access. Cognitive Radio (CR) strives to maximise the use of limited radio bandwidth in wireless networks while accommodating an expanding number of services and applications. The secondary user (SU) should be able to use the radio spectrum not used by the essential network in the cognitive radio network to operate effectively. Sensing of spectrum is an important part of cognitive radio. Energy detection is one of the spectrum detection methods accessible in the literature and is widely used because it is easy to construct and does not need any information about the PU (primary user). In low SNR zones, however, the conventional energy detector's performance deteriorates. CSS (Cooperative Spectrum Sensing) with a double threshold was established to improve decision dependability, albeit at the sacrifice of some information. Extensive simulation utilising the MATLAB simulation programme is used to describe the detection performance.