Design and implementation of spectrum sensing for cognitive radios with a frequency-hopping primary system

被引：5

作者：

Gurugopinath, Sanjeev ^{[1
]}

Akula, Raghavendra ^{[1
]}

Murthy, Chandra R. ^{[1
]}

Prasanna, R. ^{[1
]}

Amrutur, Bharadwaj ^{[1
]}

机构：

[1] Indian Inst Sci, Dept ECE, Bangalore 560012, Karnataka, India

来源：

PHYSICAL COMMUNICATION | 2015年 / 17卷

关键词：

Spectrum sensing; Frequency-hopping primary; FAR algorithm; Software defined radio; SIGNAL-DETECTION; NETWORKS;

D O I：

10.1016/j.phycom.2015.09.001

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this work, spectrum sensing for cognitive radios is considered in the presence of multiple Primary Users (PU) using frequency-hopping communication over a set of frequency bands. The detection performance of the Fast Fourier Transform (FFT) Average Ratio (FAR) algorithm is obtained in closed-form, for a given FFT size and number of PUs. The effective throughput of the Secondary Users (SU) is formulated as an optimization problem with a constraint on the maximum allowable interference on the primary network. Given the hopping period of the PUs, the sensing duration that maximizes the SU throughput is derived. The results are validated using Monte Carlo simulations. Further, an implementation of the FAR algorithm on the Lyrtech (now, Nutaq) small form factor software defined radio development platform is presented, and the performance recorded through the hardware is observed to corroborate well with that obtained through simulations, allowing for implementation losses. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：172 / 184

页数：13

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