Results 231 to 240 of about 22,621 (259)

Fast technique for wideband spectrum sensing

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
The wideband spectrum sensing method described in this paper considers selecting unoccupied frequencies within a frequency band of interest. Two energy detection criteria are required to select an unoccupied frequency: 1) the energy of an unoccupied frequency must be below a predetermined threshold; 2) the sum of energy surrounding an unoccupied ...
Anthony Martone, Kenneth Ranney
openaire   +1 more source

Evaluation of the Wideband Compressive Radio Receiver for spectrum sensing

IEEE Africon '11, 2011
We present an empirical evaluation of the carrier detection method used in the Wideband Compressive Radio Receiver (WCRR), which is of particular interest for spectrum sensing in Cognitive Radio (CR) and Dynamic Spectrum Access (DSA). We study the effect of different combinations of the decimation factor L, and window lengths, N.
Sarel J. de Wet, Albert S. J. Helberg
openaire   +1 more source

Wideband Spectrum Sensing Techniques

2015
From a physical standpoint, the distinguishing feature of a cognitive radio (CR) is the spectrum sensing unit (SSU). The SSU must be designed in such a way that it can scan the entire frequency spectrum and locate unused channels. The location of unused channels is not a trivial task for two main reasons. First, the frequency spectrum band may be large
openaire   +1 more source

Wideband spectrum sensing using the all-phase FFT

2011 9th IEEE International Conference on ASIC, 2011
Spectrum sensing is a key technology of cognitive radio. The goal of spectrum sensing in this context is to achieve a high detection probability in order to avoid causing interference to the primary licensed users. Among the methods available for spectrum sensing, energy detection has been widely applied in hardware implementations.
Huai, Lian, Sobelman, Gerald E., Zhou, Xiaofang   +2 more
openaire   +2 more sources

Wideband spectrum sensing algorithm based on frequency correlation

2013 15th IEEE International Conference on Communication Technology, 2013
Without the priori information of interference system, iterative detection algorithm can make a good performance. However, most of current iterative energy detection algorithms are confined to the hypothesis that the SNR within the entire detecting band is the same, which is obviously unrealistic in realistic application, especially when the frequency ...
Long Yuan, Feng Ren, Lu Xing, Tao Peng 0001, Wenbo Wang 0007   +4 more
openaire   +1 more source

An Edge Detection Approach to Wideband Temporal Spectrum Sensing

2016 IEEE Global Communications Conference (GLOBECOM), 2016
In wideband spectrum sensing, an unlicensed user determines which portions of a given band have been left idle by the licensed users. A historical deficiency of wideband spectrum sensing, the inability to detect signals with low duty cycle, was addressed in a recent paper, where wideband temporal spectrum sensing was introduced. We propose an algorithm
Joseph M. Bruno, Brian L. Mark, Zhi Tian
openaire   +1 more source

SDR Implementation of Spectrum Sensing for Wideband Cognitive Radio

2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall), 2015
This paper provides experimental results of the edge detection and spectrum sensing algorithms for wideband cognitive radio networks which are recently proposed in [1] using software defined radio (SDR) platform. The considered algorithms employ ratio based test statistics for detecting the edges of all sub-bands and generalized energy detection (GED ...
Juan Carlos Merlano Duncan, Tadilo Endeshaw Bogale, Long Bao Le   +2 more
openaire   +1 more source

Methods and technologies for wideband spectrum sensing

Measurement, 2013
Abstract The paper presents a review of the measurement methods and the technologies for wideband spectrum sensing. Wideband spectrum sensing is a relevant task in RF measurement instruments and telecommunications equipments. The first part of the paper is dedicated to the discussion of methods. They have been classified into five main approaches: (i)
openaire   +1 more source

Performance of wideband spectrum sensing under fading channel

2015 Seventh International Workshop on Signal Design and its Applications in Communications (IWSDA), 2015
In this paper, we study the performance of the wideband spectrum sensing for cognitive radio network under different fading channels. We compare the performance of wideband spectrum sensing where each channel in the band undergoes fading with that of additive white Gaussian noise channel.
Kamal M. Captain, Manjunath V. Joshi
openaire   +1 more source

Method and apparatus for wideband spectrum sensing

2018
Examples of wideband spectrum sensing techniques for cognitive radio are provided. The techniques permit undersampling (e.g., sub-Nyquist sampling) the spectrum band, which permits use of more cost effective electronic components (e.g., lower frequency analog-to-digital converters (ADC)). The techniques permit determination of whether there are any (or
Laneman, J. Nicholas, Sun, Zhanwei
openaire   +1 more source