Next Article in Journal
Electrical Impedance Spectroscopy-Based Defect Sensing Technique in Estimating Cracks
Previous Article in Journal
Quaternion-Based Unscented Kalman Filter for Accurate Indoor Heading Estimation Using Wearable Multi-Sensor System
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(5), 10891-10908; doi:10.3390/s150510891

Resource-Efficient Fusion with Pre-Compensated Transmissions for Cooperative Spectrum Sensing

1
National Institute of Telecommunications—Inatel, Av. João de Camargo, 510, 37540-000 Santa Rita do Sapucaí, Brazil
2
University of Hull, Cottingham Road, Hull HU6 7RX, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Leonhard M. Reindl
Received: 3 April 2015 / Revised: 30 April 2015 / Accepted: 4 May 2015 / Published: 8 May 2015
(This article belongs to the Section Sensor Networks)
View Full-Text   |   Download PDF [1003 KB, uploaded 8 May 2015]   |  

Abstract

Recently, a novel fusion scheme for cooperative spectrum sensing was proposed for saving resources in the control channel. Secondary users (SUs) simultaneously report their decisions using binary modulations with the same carrier frequencies. The transmitted symbols add incoherently at the fusion centre (FC), leading to a larger set of symbols in which a subset is associated with the presence of the primary user (PU) signal, and another subset is associated with the absence of such a signal. The decision criterion applied for discriminating these subsets works under the assumption that the channel gains are known at the FC. In this paper, we propose a new simultaneous transmission and decision scheme in which the task of channel estimation is shifted from the FC to the SUs, without the need for feeding-back of the estimates to the FC. The estimates are used at the SUs to pre-compensate for the reporting channel phase rotations and to partially compensate for the channel gains. This partial compensation is the result of signal clipping for peak-to-average power ratio (PAPR) control. We show, analytically and with simulations, that this new scheme can produce large performance improvements, yet reduces the implementation complexity when compared with the original one. View Full-Text
Keywords: cognitive radio; cooperative spectrum sensing; decision fusion; channel inversion; crest factor; clipping cognitive radio; cooperative spectrum sensing; decision fusion; channel inversion; crest factor; clipping
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Guimarães, D.A.; Aquino, G.P.; Cattaneo, M.E.G.V. Resource-Efficient Fusion with Pre-Compensated Transmissions for Cooperative Spectrum Sensing. Sensors 2015, 15, 10891-10908.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top