An Implementation of the L-Estimate Distributions for Analysis of Signals in Heavy-Tailed Noise

An analog-digital system for implementation of the robust time-frequency distributions is proposed. It provides an efficient real-time analysis of nonstationary signals corrupted by heavy-tailed noise. The most important part of this system is the realization of the L-estimate short-time Fourier transform that requires sorting operation. The proposed solution is designed to execute sorting operation within a single clock cycle, regardless of the number of inputs. The performance of the proposed hardware is tested on a real signal example.

[1]  Igor Djurovic,et al.  Robust time-frequency distributions , 2001, Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467).

[3]  Braham Barkat.  Analysis of frequency modulated signals in multiplicative noise , 2001, Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467).

[4]  Srdjan Stankovic,et al.  An architecture for the vlsi design of systems for time-frequency analysis and time-varying filtering , 2002, Ann. des Télécommunications.

[5]  Irena Orovic,et al.  Hardware Realization of Generalized Time-Frequency Distribution with Complex-Lag Argument , 2009, EURASIP J. Adv. Signal Process..

[6]  Boualem Boashash,et al.  An efficient real-time implementation of the Wigner-Ville distribution , 1987, IEEE Trans. Acoust. Speech Signal Process..

[7]  Srdjan Stankovic,et al.  Special purpose hardware for time frequency analysis , 1997 .

[8]  Braham Barkat,et al.  Robust time-frequency distributions based on the robust short time fourier transform , 2005, Ann. des Télécommunications.

[9]  Srdjan Stankovic,et al.  An architecture for the realization of a system for time-frequency signal analysis , 1997 .

[10]  Igor Djurovic,et al.  Robust L-estimation based forms of signal transforms and time-frequency representations , 2003, IEEE Trans. Signal Process..

[11]  Rodolfo Zunino,et al.  Mixed analog-digital circuit for linear-time programmable sorting , 1997, Proceedings of 1997 IEEE International Symposium on Circuits and Systems. Circuits and Systems in the Information Age ISCAS '97.

[12]  M. Amin,et al.  Short-time Fourier transforms using cascade filter structures , 1995 .

[13]  Guido Masera,et al.  FPGA implementation of time-frequency analysis algorithms for laser welding monitoring , 2009, Microprocess. Microsystems.

[14]  Manabu Yamada,et al.  A super parallel sorter using a binary neural network with AND-OR synaptic connections , 1992 .

[15]  Abdullah Al-Shoshan,et al.  A high performance architecture for computing the time-frequency spectrum , 2000 .

[16]  Guo-Ruey Tsai,et al.  An Approach to FPGA-based Time-Frequency Spectrogram by Real-Time Sweep Spectral Extraction Algorithm , 2005, TENCON 2005 - 2005 IEEE Region 10 Conference.

[17]  Braham Barkat.  Instantaneous frequency estimation of nonlinear frequency-modulated signals in the presence of multiplicative and additive noise , 2001, IEEE Trans. Signal Process..

[18]  Syed Ismail Shah,et al.  Techniques to Obtain Good Resolution and Concentrated Time-Frequency Distributions: A Review , 2009, EURASIP J. Adv. Signal Process..

[19]  Abdullah Al-Shoshan,et al.  Systolic arrays architecture for computing the time-frequency spectrum , 2000, J. Syst. Archit..

[20]  Cornel Ioana,et al.  Multi-component signal denoising using unitary time-frequency transforms , 2005, 2005 13th European Signal Processing Conference.

[21]  Nikša Tadić,et al.  A low-voltage complementary metal-oxide semiconductor adapter circuit suitable for input rail-to-rail operation , 2010 .

[22]  Mihai F. Ionescu,et al.  Optimizing parallel bitonic sort , 1997, Proceedings 11th International Parallel Processing Symposium.

[23]  S. Rovetta,et al.  Minimal-connectivity circuit for analogue sorting , 1999 .

[24]  Victor Sucic,et al.  Nonlinear IF Estimation Based on the Pseudo WVD Adapted Using the Improved Sliding Pairwise ICI Rule , 2009, IEEE Signal Processing Letters.