In this paper, a cooperative spectrum sensing scheme based on compressive sensing is proposed. In this scheme, secondary users (SUs) are organized in clusters. In each cluster, SUs forward their compressed signals to the cluster head. Then, the cluster heads report the local sensing data to the fusion center to make the final decision. Analog to information converter is adopted to acquire the received SUs signals. The proposed scheme is evaluated using several metrics, including probability of detection, compression ratio, probability of error, and processing time. The simulation results are compared with those of other cooperative sensing schemes. With our proposed scheme, cooperative spectrum sensing achieves a high probability of detection of 97%, a processing time of 2ms, a low compression ratio of 10%, and low error rate of 35 %. These results show that our proposed method outperforms the spectrum sensing without compressive sensing.
Nowadays wireless technology is one of the most common technologies used in our day to day life. As wireless technology is very much easier to implement rather than wired, day by day its application is increasing. Through the continuous development of wireless communication technology, it is now highly used in wireless equipment controlling. That is we can control our electronics and electrical equipment from a certain distant part. It can be said that equipment can be controlled from a distance only with a controller in hand without being going near to that. In this design project, a control unit is built with nRF24L01 wireless transceiver module and Arduino Uno R3 to control multiple types of equipment. It is a multipurpose radio controller that means it can be used for various purposes such as light controlling, servo motor controlling, DC motor controlling in radio controlled multipurpose vehicle, quadcopter etc. The controller is consisting of a transmitter unit and a receiver unit both build with nRF24L01 and Arduino Uno R3. The receiver unit controls the attached equipment as per the transmitter’s direction.
This research article published by International Journal of Digital Information and Wireless Communications, Vol. 9, No. 2, 2019
