A DC Offset Adaptive Energy Detection Algorithm

There are some challenges associated with the spectrum sensing for cognitive radio (CR), one main challenge of spectrum sensing is hardware requirements. The paper proposes the energy detection and a direct-conversion spectrum sensing receiver (DCSSR) to respond to the challenge of hardware requirements. However, the main problem is DC offsets of the DCSSR. A DC offset adaptive energy detection (DC-AED) algorithm is proposed to resolve the problem. The paper gives the theory analysis of DC-AED and simulates its detection performance. The simulation results show that DC-AED can remove the influence of DC offsets perfectly while the change period of DC offsets is larger than 64 times the detection length.