Cooperative energy detection scheme for cognitive radio using RSTC

2011 ◽  
Author(s):  
D. Balachandar ◽  
S. Sudhagar
Keyword(s):  
Cognitive Radio ◽  
Energy Detection ◽  
Detection Scheme ◽  
Cooperative Energy

Adaptive Sequential Cooperative Energy Detection Scheme for Primary User Detection in Cognitive Radio

2011 ◽  
Vol E94-B (10) ◽  
pp. 2896-2899 ◽  
Author(s):  
Shengliang PENG ◽  
Xi YANG ◽  
Shuli SHU ◽  
Pengcheng ZHU ◽  
Xiuying CAO
Keyword(s):  
Cognitive Radio ◽  
Energy Detection ◽  
Primary User ◽  
Detection Scheme ◽  
Cooperative Energy

scholarly journals Fast Cooperative Energy Detection under Accuracy Constraints in Cognitive Radio Networks

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Shengliang Peng ◽  
Weibin Zheng ◽  
Renyang Gao ◽  
Kejun Lei
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Energy Detection ◽  
Radio Networks ◽  
Detection Accuracy ◽  
Detection Time ◽  
Rule Based ◽  
Counting Rule ◽  
Accuracy Constraints ◽  
Cooperative Energy

Cooperative energy detection (CED) is a key technique to identify the spectrum holes in cognitive radio networks. Previous study on this technique mainly aims at improving the detection accuracy, while paying little attention to the performance of detection time. This paper concentrates on the issue of fast CED, which is achieved by minimizing its detection time subject to the constraints on detection accuracy. Firstly, the prevalent counting rule based CED algorithm is optimized. Taking the special cases of counting rule (AND rule and OR rule), for example, we show that detection time can be minimized by selecting an optimal number of secondary users. Moreover, we prove that OR rule is superior to AND rule in detection time, and thus OR rule based CED is faster than AND rule based CED. Then, a sequential test (ST) based CED algorithm is proposed to exploit the benefit of ST and detect primary user even faster. After analyzing its detection time, we illustrate that ST based CED is able to spend the minimal detection time in satisfying the accuracy constraints by choosing an optimal sample number. Simulation results are provided to verify the effectiveness of both fast algorithms discussed in this paper.

scholarly journals Relay Assisted Spectrum Sensing in Presence of IQ Imbalance in Multi-Channel System

2021 ◽  
Author(s):  
Amaresh Kumar Sahu ◽  
Arunanshu Mahapatro ◽  
Radheshyam Patra
Keyword(s):  
Cognitive Radio ◽  
Spectrum Sensing ◽  
Dynamic Spectrum Access ◽  
Cooperative Spectrum Sensing ◽  
Low Cost ◽  
Energy Detection ◽  
Primary User ◽  
Detection Scheme ◽  
Robust Detection ◽  
Spectrum Holes

Abstract The increasing demand of wireless technology leads to a need for dynamic spectrum access that is positively accomplished by cognitive radio (CR) technology. For its acceptable efficiency it needs a robust detection scheme which detect the spectrum holes. This paper investigates a cooperative spectrum sensing method for a relay-based cognitive radio network. In general relay is a low cost device and is more prone to hardware impairment such as In-phase and Quadrature-phase Imbalance (IQI), which can considerably limit the capabilities of sensing spectrum holes. This work studies the energy detection (ED) based spectrum sensing in multi-channel receiver scenarios that are affected by IQI. The detection and false alarm probabilities considering Gaussian primary user signal models are derived. Our results are simulation based and verified with theoretical findings.

Convolution Based Energy Detection Scheme for Cognitive Radio Systems

2019 ◽  
Author(s):  
Theofanis Xifilidis ◽  
Kostas E. Psannis ◽  
George Minopoulos ◽  
George Kokkonis ◽  
Yutaka Ishibashi
Keyword(s):  
Cognitive Radio ◽  
Energy Detection ◽  
Detection Scheme ◽  
Cognitive Radio Systems ◽  
Radio Systems
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