Modified Threshold-based Spectrum Sensing Approach for VANETs

Main Article Content

Narendrakumar Chauhan, Purvang Dalal

Abstract

The Primary User (PU) signal detection in Cognitive Radio (CR) is crucial and is achieved through spectrum sensing techniques. The Energy Detection method is a commonly used technique, and selecting a proper threshold is essential to enhance the efficiency of the CR system. This research paper demonstrates the maximum achievable throughput and validates a Modified Threshold (MT) approach. The authors consider a scenario with multiple antennas at the receiver, where these antennas are correlated and subjected to mobility effects, and they employ the Energy Detection (ED) for spectrum sensing. The study analyzes the system's performance over a Nakagami-m fading channel, considering available correlations among the antenna elements. To compute important statistical values, the Moment Generating Function (MGF) method is employed. The research employs specialized mathematical functions, such as the Lauricella and confluent hypergeometric functions, to derive closed-form expressions for the Probability of Detection when employing the diversity technique. The results indicate a significant enhancement in the performance of the proposed algorithm when utilizing the modified threshold parameter across a wide range of Signal to Noise Ratio (SNR) values. Additionally, increasing the number of branches in the antenna system further improves detection performance. Interestingly, under high fading parameter conditions (m=4), the detection probability is found to be superior with exponential correlation among the L antenna elements compared to other available correlated branches.

Article Details

How to Cite
Narendrakumar Chauhan, et al. (2023). Modified Threshold-based Spectrum Sensing Approach for VANETs. International Journal on Recent and Innovation Trends in Computing and Communication, 11(10), 2135–2145. https://doi.org/10.17762/ijritcc.v11i10.8898
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Articles
Author Biography

Narendrakumar Chauhan, Purvang Dalal

Narendrakumar Chauhan1, Purvang Dalal2

1Electronics and Communication Department

D. D. University

Nadiad, Gujarat, India

nvc.ec@ddu.ac.in

2Electronics and Communication Department

D. D. University

Nadiad, Gujarat India

pur_dalal.ec@ddu.ac.in