scholarly journals Threshold Optimization in Energy Detection Scheme for Maximizing the Spectrum Utilization

2016 ◽  
Vol 93 ◽  
pp. 191-198 ◽  
Author(s):  
Pankaj Verma ◽  
Brahmjit Singh
Keyword(s):  
Energy Detection ◽  
Spectrum Utilization ◽  
Detection Scheme ◽  
Threshold Optimization

scholarly journals SPECTRUM SENSING USING CYCLIC PREFIX IN COGNITIVE RADIO WIRELESS SYSTEM

2013 ◽  
pp. 123-127
Author(s):  
T. NAGAMANI ◽  
M.V. SUDHAKAR ◽  
E. ADINARAYANA
Keyword(s):  
Cognitive Radio ◽  
User Satisfaction ◽  
Wireless Systems ◽  
Energy Detection ◽  
Substantial Improvement ◽  
Cyclic Prefix ◽  
Short Message ◽  
Spectrum Utilization ◽  
Primary Signal

The rapid growth of wireless communications has made the problem of spectrum utilization ever more critical. The increasing diversity (voice, short message, Web & multimedia) and demand of high quality-of-service (QoS) applications have resulted in overcrowding of the allocated (officially sanctioned) spectrum bands, leading to significantly reduced levels of user satisfaction. The concepts of GLRT algorithm and substantial improvement over the U-GLRT algorithm are explained. This paper presents a model which uses efficient CP method for CR in Wireless Systems. Primary signal has been detected in the OFDM transmission with both the CPCC and MP–based C-GLRT algorithms greatly outperform energy detection in multi path environment has been implemented using software design. The signal model in our analysis is to efficiently exploit the correlation among the transmitted signals due to the presence of CP. Proposed method of cognitive radio takes two steps of implementation .first named as MP based is to detect the noise and de-noise the signal and the second is cp based in which the signals are identified based on the cyclic prefix.

scholarly journals An Adaptive Energy Detection Scheme with Real-Time Noise Variance Estimation

2019 ◽  
Vol 39 (5) ◽  
pp. 2623-2647 ◽  
Author(s):  
Libin K. Mathew ◽  
Shreejith Shanker ◽  
A. P. Vinod ◽  
A. S. Madhukumar
Keyword(s):  
Real Time ◽  
Variance Estimation ◽  
Energy Detection ◽  
Noise Variance ◽  
Detection Scheme

Analysis of Spectrum Sensing in Cognitive Radio Network with OFDM

2018 ◽  
Vol 8 (6) ◽  
pp. 84
Author(s):  
Shadab Ahmed Khan ◽  
Pawandeep Kaur
Keyword(s):  
Cognitive Radio ◽  
Spectrum Sensing ◽  
Cognitive Radio Network ◽  
Energy Detection ◽  
Radio Spectrum ◽  
Probability Of Detection ◽  
Spectrum Utilization ◽  
Wireless Applications ◽  
Novel Technology ◽  
Cognitive Environment

With the development of a new and ever expanding wireless applications and services, spectrum resources are facing in demands. In present scenario, the spectrum allotment has been done by providing each new service with its own fixed frequency Slot. Most of the user’s spectrum is already assigned, so it becomes very difficult to find spectrum for other users or existing users. This leads to the scarcity of available spectrum and inefficient channel utilization. Cognitive radio is a novel technology which improves the spectrum utilization by allowing secondary user to borrow unused radio spectrum from primary licensed users or to share the spectrum with the primary users. Present paper deals with the spectrum sensing in which multiple users detect the spectrum gap through energy detection and investigate the detection performance in an efficient and implementable way. Simulation results showed that the probability of detection is achieved at small value SNR in case of OFDM modulation as compare the other and simple cognitive environment.

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
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