Optimal sensing time of soft decision cooperative spectrum sensing in cognitive radio networks

Author

Dafei Sun ; Tiecheng Song ; Ming Wu ; Jing Hu ; Jie Guo ; Bin Gu

Author_Institution

Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China

fYear

2013

fDate

7-10 April 2013

Firstpage

4124

Lastpage

4128

Abstract

Spectrum sensing is a key feasible technology for cognitive radio (CR). Sensing time is an important sensing parameter which brings about a sensing-throughput tradeoff. In this paper, based on soft decision schemes, we investigate the sensing-throughput tradeoff problem and analyze the impact of different system parameters on the optimal sensing time for cooperative spectrum sensing. Simulation results show that maximal ratio combination g (MRC) and modified deflection coefficient (MDC) schemes have almost the same performance which outperform equal gain combination (EGC) scheme. Further, optimal sensing time decreases with the increase of number of CR users and increases when average signal-noise-ratio (SNR) decreases.

Keywords

cognitive radio; cooperative communication; diversity reception; optimisation; radio spectrum management; EGC; MDC schemes; MRC; cognitive radio; cooperative spectrum sensing; equal gain combination; maximal ratio combination; modified deflection coefficient; optimal sensing time; sensing throughput tradeoff; soft decision schemes; Cognitive radio; Resource management; Sensors; Signal to noise ratio; Simulation; Throughput; cognitive radio; cooperative spectrum sensing; sensing time; soft decision;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2013 IEEE

Conference_Location

Shanghai

ISSN

1525-3511

Print_ISBN

978-1-4673-5938-2

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2013.6555238

Filename

6555238