Results 211 to 220 of about 2,288 (244)

Secure enhanced compressed wideband spectrum sensing

2012 International Conference on Wireless Communications and Signal Processing (WCSP), 2012
Spectrum Sensing Data Falsification (SSDF) attack is one of the most important threats to spectrum sensing for wireless cognitive radio networks. On the basis that the wireless signal in cognitive radio network is inherently sparse in frequency domain, this paper develops a distributed compressed wideband spectrum sensing approach which combines both ...
Yao Gang, Baoyu Zheng, Junqing Chen
openaire   +1 more source

Exploiting Space and Antenna Diversity for Wideband Spectrum Sensing

2021 International Conference on COMmunication Systems & NETworkS (COMSNETS), 2021
Cognitive radio (CR) is a technology that greatly exhibits signs of future success for spectrum utilization. One of the crucial tasks of CR is the spectrum sensing (SS), which identifies the spectrum opportunity for unlicensed users avoiding the interference to the licensed users.
Kamal M. Captain, Manjunath V. Joshi
openaire   +1 more source

Adaptive Compressive Spectrum Sensing for Wideband Cognitive Radios [PDF]

IEEE Communications Letters, 2012
11 pages, 4 figures. This paper has been accepted to be published in IEEE Communications Letters.
Arumugam Nallanathan, , Wei-Yu Chiu
exaly   +4 more sources

Wideband spectrum sensing based on coprime sampling

2015 22nd International Conference on Telecommunications (ICT), 2015
In wideband compressive spectrum sensing, when the number of occupied subbands in the monitored wideband increases, the existing compressive sensing approaches have to raise the sampling rate to maintain a desired sensing performance. What is worse, that will add computational complexity of the following signal reconstruction.
Shiyu Ren, Zhimin Zeng, Caili Guo, Xuekang Sun   +3 more
openaire   +1 more source

New algorithms for wideband spectrum sensing via compressive sensing

2013 IEEE International Conference on Communications (ICC), 2013
We consider the problem of spectrum sensing in a Cognitive Radio (CR) system when the primaries can be occupying a few subbands in a wideband spectrum. Since the primary signal dimension is large, Nyquist rate can be very high. Compressive sensing (CS) can be useful in this setup.
Shwetank Mistry, Vinod Sharma
openaire   +1 more source

Wideband spectrum sensing technique based on multitask compressive sensing

2016 IEEE Symposium on Computers and Communication (ISCC), 2016
Sensing the spectrum is the central operation to enable cognitive users to identify the spectrum occupancy. Wideband spectrum sensing enables detecting occupancy at different bands. In this paper, we propose a wavelet based multitask compressive sensing (WMCS) algorithm for constructing the spectrum edges directly from the compressive measurement.
Osama Elnahas, Maha Elsabrouty
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

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

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