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Spectrum sensing of orthogonal space-time block coded signals with multiple receive antennas
2010
2010 IEEE International Conference on Acoustics, Speech and Signal Processing
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We consider detection of signals encoded with orthogonal spacetime block codes (OSTBC), using multiple receive antennas. ...
We propose a number of GLRT based detectors for the different cases, that exploit the redundancy structure of the OSTBC signal. ...
We are interested in detecting signals encoded with orthogonal space-time block codes (OSTBC). Such signals contain redundancy and they have a specific structure. ...
doi:10.1109/icassp.2010.5496088
dblp:conf/icassp/AxellL10
fatcat:wo6tf6b7grh7np2o2y6rs7qqtq
A unified framework for GLRT-based spectrum sensing of signals with covariance matrices with known eigenvalue multiplicities
2011
2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
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In this paper, we create a unified framework for spectrum sensing of signals which have covariance matrices with known eigenvalue multiplicities. ...
We also show a number of applications to spectrum sensing for cognitive radio and show that the GLRT for these applications, of which some are already known, are special cases of the general result. ...
Orthogonal Space-Time Block Codes Now consider a slightly more general case, when the transmitted signal is encoded with an orthogonal space-time block code (OSTBC). ...
doi:10.1109/icassp.2011.5946277
dblp:conf/icassp/AxellL11
fatcat:ngn3kj3a4bh6xaja36h34r6lsu
Estimation of subspace occupancy
2014
2014 48th Asilomar Conference on Signals, Systems and Computers
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5.1 MAP Estimate Results for M = 95, N = 100, K = 30, 50, 70, 90 for the Blue, Green, Red and Cyan Lines Respectively, with an SNR at the Receiver of 12dB. ...
As discussed in [2] , spectrum sensing can be used to obtain the spectrum usage characteristics across multiple dimensions including time, space, frequency and code. ...
As stated in [3] , spectrum sensing using multiple antennas can be accomplished using eigenvalue-based detection. ...
doi:10.1109/acssc.2014.7094735
dblp:conf/acssc/BeaudetC14
fatcat:xemvgrhtubbmnodj5ms37vqlni
Spectrum Sensing for Cognitive Radio : State-of-the-Art and Recent Advances
2012
IEEE Signal Processing Magazine
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space-time block code (OSTBC) [28] , or if the signal is an OFDM signal [12] . ...
Examples of the sorted eigenvalues of R for an orthogonal space-time block code (Alamouti) [28] , and for a general MIMO system [10] , with two transmit and four receive antennas, are shown in Figure ...
doi:10.1109/msp.2012.2183771
fatcat:oc3gy4uclveh3fqzvzcvlfwj5e
IEEE Signal Processing Magazine - May 2006
2006
IEEE Signal Processing Magazine
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space-time block code (OSTBC) [28] , or if the signal is an OFDM signal [12] . ...
Examples of the sorted eigenvalues of R for an orthogonal space-time block code (Alamouti) [28] , and for a general MIMO system [10] , with two transmit and four receive antennas, are shown in Figure ...
doi:10.1109/msp.2006.1628863
fatcat:3xpekmfz3fb4napvmsukwrlbvu
Performance and Reporting Channel Traffic of Eigenvalue Fusion and Block-coded Decision Fusion for Spectrum Sensing of OFDMA Signals
2016
Journal of Communication and Information Systems
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This paper presents a comparison between performance and data traffic in the reporting control channel of a cooperative centralized spectrum sensing scheme designed to detect idle OFDMA subchannels for ...
Eigenvalue and decision fusion strategies are compared when repetition and BCH block codes are used to protect the data carrying the sensor decisions. ...
The eigenvalue-based detection [7] techniques are the most recent and one of the most promising solutions to the problem of spectrum sensing of both narrowband and wideband signals. ...
doi:10.14209/jcis.2016.4
fatcat:uhzafrtwpvcgbjuzietdbhlhgu
Asymptotic Frame Theory for Analog Coding
2021
Foundations and Trends in Communications and Information Theory
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To name a few, spreading sequences for code-division multiple access (CDMA), over-complete representations for multiple-description (MD) source coding, space-time codes, sensing matrices for compressed ...
Over-complete systems of vectors, or in short, frames, play the role of analog codes in many areas of communication and signal processing. ...
users m > k [120], [128], CDMA (spread) [158] Impulsive block-length bandwidth non-erased m < k [138], [151] channel Space-time space time non-erased an- m < k [131], [137], coding (diversity) tennas ...
doi:10.1561/0100000125
fatcat:xrwkdnvafrgjtbelxtqdimx4la
Optimizing Multiband Orthogonal Transmission of Low-Energy and Efficient Cognitive Ultra Wideband System
2016
Journal of Information Hiding and Multimedia Signal Processing
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On this basis, the system simulation model is built, to analyze the signal power spectrum density and system BER performance on the Gauss white noise background and the interference of pulse correlation ...
The simulations reveal that pulse signal is a good approximation of the emission mask and orthogonal pulses pair can greatly improve the information transmission rate, meanwhile has smaller BER than serial ...
This work is supported by National Natural Science Foundation of China (NO.61201399,61202456) and Heilongjiang Provincial Education Department Science and Technology Research Project (NO.12531492). ...
dblp:journals/jihmsp/ZhaoWDT16
fatcat:2vrxwdda4fhrjlxe6jmagkfake
Hyperspectral Acquisition Technology Based on Compressed Sampling in Spatial Domain
2022
North atlantic university union: International Journal of Circuits, Systems and Signal Processing
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Experimental results show that, compared with existing image block compression sensing algorithms, this algorithm can significantly improve the quality of image signal reconstruction. ...
Based on Bayesian theory, a compressed sensing measurement matrix of adaptive projection is proposed. ...
Because compressed sensing measurement based on block can effectively reduce the computational complexity of coding end and memory consumption of measurement matrix, and because of the small amount of ...
doi:10.46300/9106.2022.16.39
fatcat:52gstjz6rjbaxpl3blv33bhaqy
Cooperative Communications for Cognitive Radio Networks
2009
Proceedings of the IEEE
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To exploit the maximum spectrum opportunities, we present a cognitive space-time-frequency coding technique that can opportunistically adjust its coding structure by adapting itself to the dynamic spectrum ...
In this paper, we consider the application of these technologies to spectrum sensing and spectrum sharing. ...
Then, the received signal block at the destination on the nth band is given by Z n ¼ X K i¼1 b i;n c i;n h R i;n ;D þ N i;n À Á (18) where c i;n is the coded signal block sent from band n of cognitive ...
doi:10.1109/jproc.2009.2015716
fatcat:fk5jxnj3uzgenhn3vw46oviftu
Study of tv white spaces in the context of cognitive radio for the deployment of WiFi in rural zones of the colombian army
2020
Espacios
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This article presents a study on Television White Spaces (TVWS) to solve the connectivity of the WiFi service for the Colombian National Army in rural areas. ...
With this preliminary analysis, it was possible to understand how the PHY and MAC layers of the 802.22 Standard work to select the appropriate devices. ...
Research Groups of the Universidad Pedagógica y Tecnológica de Colombia for the financial support during this research work. ...
doi:10.48082/espacios-a20v41n50p12
fatcat:zsjs6azbdfdh5e5mfzxklgk5f4
GSM-RF Channel Characterization Using a Wideband Subspace Sensing Mechanism for Cognitive Radio Networks
2018
Wireless Communications and Mobile Computing
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In this paper, we examine a spectrum sharing opportunities over the existing Global System of Mobile Communication (GSM) networks, by identifying the unused channels at a specific time and location. ...
For this purpose, we propose a wideband spectrum sensing mechanism to analyze the status of 51 channels at once, belonging to the 10 MHz bandwidth centered at the frequency 945 MHz, in four different areas ...
Conflicts of Interest The authors declare that they have no conflicts of interest.
Supplementary Materials ...
doi:10.1155/2018/7095763
fatcat:7uy6njyw3jcaxmzxoz427vluq4
On Performance Bounds for Space–Time Codes on Fading Channels
2004
IEEE Transactions on Communications
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Index Terms-Block fading, distance spectrum, diversity, frameerror rate (FER), outage probability, performance bounds, quasistatic fading, space-time (ST) codes, union bound. ...
We evaluate truncated union bounds on the frameerror rate (FER) performance of space-time (ST) codes operating over the quasi-static fading channel and compare them with computer simulation results. ...
sensor data analysis, space-time coding, and adaptive signal processing. ...
doi:10.1109/tcomm.2004.836429
fatcat:gkxmeq2pfrg4di6bx2vdamxf7e
Spectrum Sensing Methodologies for Cognitive Radio Systems: A Review
2015
International Journal of Advanced Computer Science and Applications
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Two sensing schemes, namely; cooperative sensing and eigenvalue-based sensing are studied. The various advantages and disadvantages are highlighted. ...
Based on this study, the cooperative spectrum sensing is proposed for employment in spectrum sensing in wideband based cognitive radio systems. ...
that makes use of spread spectrum, time or frequency hopping codes. ...
doi:10.14569/ijacsa.2015.061203
fatcat:wlmuri5fazh5dn4ahphpxd2dl4
MultiUser Spectrum Sensing based on Multitaper Method for Cognitive Environments
2011
International Journal of Computer Applications
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This paper gives a brief but comprehensive review of the Multitaper spectrum estimation method that uses the data tapers or windows in digital signal processing. ...
This taper family minimize leakage also, and computing them requires solving eigenvalue problems that are large for long time series. ...
The C++ class gr_block is the base of all signal processing blocks in GNU Radio. The new block class we try to create must derive from gr_block or one of it's subclasses. ...
doi:10.5120/2613-1093
fatcat:fq2jm3giqrennihftky3ecden4
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