Energy Efficient Cooperative Spectrum Sensing in Cognitive Radio Sensor Network Using FPGA: a Survey

Cognitive Radio Sensor Network (CRSN) is a network of deployed wireless sensor nodes integrated with Cognitive Radio (CR) capability. It is a most promising technology to resolve spectrum scarcity resources, coexistence with another network in ISM band, and prolonging the lifetime in Wireless Sensor Networks (WSN). One of the major challenges in CRSN is the energy consumption due to the inherited limited energy from its traditional WSN. Cooperative Spectrum Sensing (CSS) is utilized used to improve the sensing performance in multipath fading, shadowing and receiver uncertainty. In this paper, we present the basic difference between the conventional WSN and the CRSN, a comprehensive overview of non-cooperative spectrum sensing methods and state-of-the-art research of EE in CRSN. Furthermore, we introduce the most commonly utilized platforms and the appropriate tools in CR field.