David Akopian
David Akopian
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Fast FFT based GPS satellite acquisition methods
D Akopian
IEE Proceedings-Radar, Sonar and Navigation 152 (4), 277-286, 2005
Modern WLAN fingerprinting indoor positioning methods and deployment challenges
A Khalajmehrabadi, N Gatsis, D Akopian
IEEE Communications Surveys & Tutorials 19 (3), 1974-2002, 2017
Weighted dilution of precision as quality measure in satellite positioning
H Sairo, D Akopian, J Takala
IEE Proceedings-Radar, Sonar and Navigation 150 (6), 430-436, 2003
Physical activity recognition by smartphones, a survey
J Morales, D Akopian
Biocybernetics and Biomedical Engineering 37 (3), 388-400, 2017
A wavelet-denoising approach using polynomial threshold operators
CB Smith, S Agaian, D Akopian
IEEE Signal Processing Letters 15, 906-909, 2008
A joint indoor WLAN localization and outlier detection scheme using LASSO and elastic-net optimization techniques
A Khalajmehrabadi, N Gatsis, DJ Pack, D Akopian
IEEE Transactions on Mobile Computing 16 (8), 2079-2092, 2016
A fast satellite acquisition method
D Akopian
Proceedings of the 14th International Technical Meeting of the Satellite …, 2001
Lossless adaptive digital audio steganography
SS Agaian, D Akopian, O Caglayan, SA D'Souza
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems …, 2005
Determining the correlation between received samples and available replica samples
D Akopian
US Patent 7,272,168, 2007
Reduced complexity acquisition of GPS signals for software embedded applications
PK Sagiraju, S Agaian, D Akopian
IEE Proceedings-Radar, Sonar and Navigation 153 (1), 69-78, 2006
Constant geometry algorithm for discrete cosine transform
J Takala, D Akopian, J Astola, J Saarinen
IEEE Transactions on Signal Processing 48 (6), 1840-1843, 2000
Architecture-oriented regular algorithms for discrete sine and cosine transforms
J Astola, D Akopian
IEEE transactions on signal processing 47 (4), 1109-1124, 1999
Structured group sparsity: A novel indoor WLAN localization, outlier detection, and radio map interpolation scheme
A Khalajmehrabadi, N Gatsis, D Akopian
IEEE Transactions on Vehicular Technology 66 (7), 6498-6510, 2016
Method in a receiver and a receiver
D Akopian, I Kontola, H Valio, S Turunen
US Patent 6,909,738, 2005
Fast acquisition implementation for high sensitivity global positioning systems receivers based on joint and reduced space search
PK Sagiraju, GVS Raju, D Akopian
IET Radar, Sonar & Navigation 2 (5), 376-387, 2008
Real-time rejection and mitigation of time synchronization attacks on the global positioning system
A Khalajmehrabadi, N Gatsis, D Akopian, AF Taha
IEEE Transactions on Industrial Electronics 65 (8), 6425-6435, 2018
Method, apparatus and system for estimating user position with a satellite positioning system in poor signal conditions
D Akopian, J Syrjarinne
US Patent 6,473,694, 2002
Methods and systems for digital image security
SS Agaian, D Akopian, RC Cherukuri, JP Perez, BM Rodriguez, ...
US Patent 7,965,861, 2011
Facilitating remote laboratory deployments using a relay gateway server architecture
A Melkonyan, A Gampe, M Pontual, G Huang, D Akopian
IEEE Transactions on Industrial Electronics 61 (1), 477-485, 2013
A development and testing instrumentation for GPS software defined radio with fast FPGA prototyping support
A Soghoyan, A Suleiman, D Akopian
IEEE Transactions on instrumentation and Measurement 63 (8), 2001-2012, 2014
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