Soft versus Hard Cooperative Energy Detection under Low SNR

Junyang SHEN; Gang XIE; Siyang LIU; Lingkang ZENG; Jinchun GAO; Yuanan LIU

doi:10.1093/ietcom/e91-b.11.3732

Regular Section

Soft versus Hard Cooperative Energy Detection under Low SNR

Junyang SHEN, Gang XIE, Siyang LIU, Lingkang ZENG, Jinchun GAO, Yuanan LIU

Author information

Keywords: approximation of Q function, cognitive radio, cooperative spectrum sensing, energy detection, hard decision, soft decision

JOURNAL RESTRICTED ACCESS

2008 Volume E91.B Issue 11 Pages 3732-3735

DOI https://doi.org/10.1093/ietcom/e91-b.11.3732

Details

Abstract

Amidst conflicting views about whether soft cooperative energy detection scheme (SCEDS) outperforms hard cooperative energy detection scheme (HCEDS) greatly in cognitive radio, we establish the bridge that mathematically connects SCEDS and HCEDS by closed approximations. Through this bridge, it is demonstrate that, if the number of detectors of HCEDS is 1.6 times as that of SCEDS, they have nearly the same performance which is confirmed by numerical simulations, enabling a quantitative evaluation of the relation between them and a resolution of the conflicting views.

Corresponding author

Register with J-STAGE for free!