Results 21 - 30 of 357

Non-orthogonal support width ica

by John A. Lee, Frédéric Vrins, Michel Verleysen - In Proc. ESANN 2006 , 2006
"... Abstract. Independent Component Analysis (ICA) is a powerful tool with applications in many areas of blind signal processing; however, its key assumption, i.e. the statistical independence of the source signals, can be somewhat restricting in some particular cases. For example, when considering seve ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
Abstract. Independent Component Analysis (ICA) is a powerful tool with applications in many areas of blind signal processing; however, its key assumption, i.e. the statistical independence of the source signals, can be somewhat restricting in some particular cases. For example, when considering

Maximum-likelihood detection of orthogonal space-time block coded OFDM . . .

by Tsung-hui Chang, Wing-kin Ma, Chong-yung Chi - IEEE TRANS. SIGNAL PROCESS , 2007
"... For orthogonal space-time block coded orthogonal frequency division multiplexing (OSTBC-OFDM) systems, many of the existing blind detection and channel estimation methods rely on the assumption that the channel is static for many OSTBC-OFDM blocks. This paper considers the blind (semiblind) maximum- ..."
Abstract - Cited by 31 (6 self) - Add to MetaCart
For orthogonal space-time block coded orthogonal frequency division multiplexing (OSTBC-OFDM) systems, many of the existing blind detection and channel estimation methods rely on the assumption that the channel is static for many OSTBC-OFDM blocks. This paper considers the blind (semiblind) maximum

Adaptive Multicarrier Modulation: A Convenient Framework for Time-Frequency Processing in Wireless Communications

by Thomas Keller, Lajos Hanzo - Proc. IEEE , 2000
"... This paper concludes with a wide-ranging throughput comparison of the schemes discussed herein under the unified constraint of a fixed target bit error rate of 10 04 . Keywords---Adaptive modulation, adaptive orthogonal frequency -division multiplexing (AOFDM), applications of OFDM, blind modem m ..."
Abstract - Cited by 122 (10 self) - Add to MetaCart
This paper concludes with a wide-ranging throughput comparison of the schemes discussed herein under the unified constraint of a fixed target bit error rate of 10 04 . Keywords---Adaptive modulation, adaptive orthogonal frequency -division multiplexing (AOFDM), applications of OFDM, blind modem

Some results on the blind identifiability of orthogonal space-time block codes from second order statistics

by Javier Vía, Ignacio Santamaría - in IEEE Int. Conf. on Acoustic, Speech, and Signal Proc. (ICASSP , 2007
"... In this paper, the conditions for blind identifiability from second order statistics (SOS) of multiple-input multiple-output (MIMO) channels under orthogonal space-time block coded (OSTBC) transmissions are studied. The main contribution of the paper is to show that, assuming more than one receive a ..."
Abstract - Cited by 6 (3 self) - Add to MetaCart
In this paper, the conditions for blind identifiability from second order statistics (SOS) of multiple-input multiple-output (MIMO) channels under orthogonal space-time block coded (OSTBC) transmissions are studied. The main contribution of the paper is to show that, assuming more than one receive

A linear fractional semidefinite relaxed ML approach to blind detection of 16-QAM orthogonal space-time block codes

by Tsung-hui Chang, Wing-kin Ma, Chong-yung Chi - in Proc. IEEE Int. Conf. Commun , 2008
"... This report considers a discrete fractional quadratic optimization problem motivated by a recent application in blind maximum-likelihood (ML) detection of higher-order QAM orthogonal spacetime block codes (OSTBCs) in wireless multiple-input multiple-output (MIMO) communications. Since this discrete ..."
Abstract - Cited by 5 (3 self) - Add to MetaCart
This report considers a discrete fractional quadratic optimization problem motivated by a recent application in blind maximum-likelihood (ML) detection of higher-order QAM orthogonal spacetime block codes (OSTBCs) in wireless multiple-input multiple-output (MIMO) communications. Since this discrete

A novel approach to convolutive blind separation of close-to-orthogonal pulse sources using second-order statistics

by Aleš Holobar, Damjan Zazula - in EUSIPCO’04, 2004
"... We introduce a novel approach suitable for blind separation of convolutive Multiple-Input-Multiple-Output mixtures of orthogonal pulse sources. The approach is based on a joint-diagonalization of the algebraic combinations of whitened correlation matrices at non-zero lags. It supposes constant and f ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
We introduce a novel approach suitable for blind separation of convolutive Multiple-Input-Multiple-Output mixtures of orthogonal pulse sources. The approach is based on a joint-diagonalization of the algebraic combinations of whitened correlation matrices at non-zero lags. It supposes constant

Orthogonal Wavelet Transform Dynamic Weighted Multi-Modulus Blind Equalization Algorithm Based on Dynamic Particle Swarm

by Ye-cai Guo, Ling-ling Hu, Tao Yuan, Xi Gong
"... Abstract — For improving the equalization performance of higher-order QAM signals, orthogonal Wavelet transform dynamic Weighted Multi-Modulus blind equalization Algorithm based on the Dynamic Particle Swarm Optimization(DPSO-WWMMA) is proposed. In this proposed algorithm, dynamic particle swarm opt ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
Abstract — For improving the equalization performance of higher-order QAM signals, orthogonal Wavelet transform dynamic Weighted Multi-Modulus blind equalization Algorithm based on the Dynamic Particle Swarm Optimization(DPSO-WWMMA) is proposed. In this proposed algorithm, dynamic particle swarm

Efficient Blind Decoding of Orthogonal Space-Time Block Codes Over Time-Selective Fading Channels

by Tao Cui, Chintha Tellambura
"... Abstract — In this paper, we consider efficient blind decoder de-sign for orthogonal space-time block codes (OSTBCs). A general decision rule for blind OSTBC decoding is derived assuming a quasi-static flat multiple-input multiple-output (MIMO) Rayleigh fading channel. We use the linear dispersion r ..."
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Abstract — In this paper, we consider efficient blind decoder de-sign for orthogonal space-time block codes (OSTBCs). A general decision rule for blind OSTBC decoding is derived assuming a quasi-static flat multiple-input multiple-output (MIMO) Rayleigh fading channel. We use the linear dispersion

On The Use of Non-orthogonal Approximate Joint Diagonalization Algorithms for Blind Source Separation in Presence of Additive Noise

by Elimane Kane
"... Abstract—We present in this paper a non-orthogonal algo-rithm for the approximate joint diagonalization of a set of matrices. It is an iterative algorithm, using relaxation technique applied on the rows of the diagonalizer. The performances of our algorithm are compared with usual standard algorithm ..."
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algorithms using blind sources separation simulations results. We show that the improvement in estimating the separating matrix can be wreaked when the level noise in the mixture is significant, the length of observed sequences is sufficiently large and when the mixing matrix is not an orthogonal matrix

A Blind Watermarking Using Orthogonal Finite Ridgelet Transform and Fuzzy C-Means

by Hai-yan Yu, Jiu-lun Fan
"... Abstract—Based on energy distribution analysis of orthogonal FRIT coefficients, a novel digital image watermark embedding and blind detecting algorithm in ridgelet domain is proposed in this paper. Since the ridgelet transform has directional sensitivity and anisotropy, the image is first partitione ..."
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Abstract—Based on energy distribution analysis of orthogonal FRIT coefficients, a novel digital image watermark embedding and blind detecting algorithm in ridgelet domain is proposed in this paper. Since the ridgelet transform has directional sensitivity and anisotropy, the image is first
Results 21 - 30 of 357