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Adaptive Signal Processing

Robust Estimation of Self-Exciting Point Process Models with Application to Neuronal Modeling


We consider the problem of estimating discrete self- exciting point process models from limited binary observations, where the history of the process serves as the covariate. We analyze the performance of two classes of estimators: l1-regularized maximum likelihood and greedy estimation for a discrete version of the Hawkes process and characterize the sampling tradeoffs required for stable recovery in the non-asymptotic regime. Our results extend those of compressed sensing for linear and generalized linear models with i.i.d.

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Authors:
Abbas Kazemipour, Min Wu and Behtash Babadi
Submitted On:
12 December 2016 - 9:35am
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[1] Abbas Kazemipour, Min Wu and Behtash Babadi, "Robust Estimation of Self-Exciting Point Process Models with Application to Neuronal Modeling", IEEE SigPort, 2016. [Online]. Available: http://sigport.org/1261. Accessed: May. 25, 2019.
@article{1261-16,
url = {http://sigport.org/1261},
author = {Abbas Kazemipour; Min Wu and Behtash Babadi },
publisher = {IEEE SigPort},
title = {Robust Estimation of Self-Exciting Point Process Models with Application to Neuronal Modeling},
year = {2016} }
TY - EJOUR
T1 - Robust Estimation of Self-Exciting Point Process Models with Application to Neuronal Modeling
AU - Abbas Kazemipour; Min Wu and Behtash Babadi
PY - 2016
PB - IEEE SigPort
UR - http://sigport.org/1261
ER -
Abbas Kazemipour, Min Wu and Behtash Babadi. (2016). Robust Estimation of Self-Exciting Point Process Models with Application to Neuronal Modeling. IEEE SigPort. http://sigport.org/1261
Abbas Kazemipour, Min Wu and Behtash Babadi, 2016. Robust Estimation of Self-Exciting Point Process Models with Application to Neuronal Modeling. Available at: http://sigport.org/1261.
Abbas Kazemipour, Min Wu and Behtash Babadi. (2016). "Robust Estimation of Self-Exciting Point Process Models with Application to Neuronal Modeling." Web.
1. Abbas Kazemipour, Min Wu and Behtash Babadi. Robust Estimation of Self-Exciting Point Process Models with Application to Neuronal Modeling [Internet]. IEEE SigPort; 2016. Available from : http://sigport.org/1261

The recursive Hessian sketch for adaptive filtering


The recursive Hessian sketch for adaptive filtering as a block diagram

We introduce in this paper the recursive Hessian sketch, a new adaptive filtering algorithm based on sketching the same exponentially weighted least squares problem solved by the recursive least squares algorithm. The algorithm maintains a number of sketches of the inverse autocorrelation matrix and recursively updates them at random intervals. These are in turn used to update the unknown filter estimate. The complexity of the proposed algorithm compares favorably to that of recursive least squares.

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Authors:
Robin Scheibler, Martin Vetterli
Submitted On:
29 March 2016 - 4:50am
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[1] Robin Scheibler, Martin Vetterli, "The recursive Hessian sketch for adaptive filtering", IEEE SigPort, 2016. [Online]. Available: http://sigport.org/1064. Accessed: May. 25, 2019.
@article{1064-16,
url = {http://sigport.org/1064},
author = {Robin Scheibler; Martin Vetterli },
publisher = {IEEE SigPort},
title = {The recursive Hessian sketch for adaptive filtering},
year = {2016} }
TY - EJOUR
T1 - The recursive Hessian sketch for adaptive filtering
AU - Robin Scheibler; Martin Vetterli
PY - 2016
PB - IEEE SigPort
UR - http://sigport.org/1064
ER -
Robin Scheibler, Martin Vetterli. (2016). The recursive Hessian sketch for adaptive filtering. IEEE SigPort. http://sigport.org/1064
Robin Scheibler, Martin Vetterli, 2016. The recursive Hessian sketch for adaptive filtering. Available at: http://sigport.org/1064.
Robin Scheibler, Martin Vetterli. (2016). "The recursive Hessian sketch for adaptive filtering." Web.
1. Robin Scheibler, Martin Vetterli. The recursive Hessian sketch for adaptive filtering [Internet]. IEEE SigPort; 2016. Available from : http://sigport.org/1064

Compressed Training Adaptive Equalization


Compressed Training Adaptive Equalization

We introduce it compressed training adaptive equalization as a novel approach for reducing number of training symbols in a communication packet. The proposed semi-blind approach is based on the exploitation of the special magnitude boundedness of communication symbols. The algorithms are derived from a special convex optimization setting based on l_\infty norm. The corresponding framework has a direct link with the compressive sensing literature established by invoking the duality between l_1 and l_\infty norms.

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Authors:
Baki Berkay Yilmaz, Alper T. Erdogan
Submitted On:
21 March 2016 - 12:13pm
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[1] Baki Berkay Yilmaz, Alper T. Erdogan, "Compressed Training Adaptive Equalization", IEEE SigPort, 2016. [Online]. Available: http://sigport.org/932. Accessed: May. 25, 2019.
@article{932-16,
url = {http://sigport.org/932},
author = {Baki Berkay Yilmaz; Alper T. Erdogan },
publisher = {IEEE SigPort},
title = {Compressed Training Adaptive Equalization},
year = {2016} }
TY - EJOUR
T1 - Compressed Training Adaptive Equalization
AU - Baki Berkay Yilmaz; Alper T. Erdogan
PY - 2016
PB - IEEE SigPort
UR - http://sigport.org/932
ER -
Baki Berkay Yilmaz, Alper T. Erdogan. (2016). Compressed Training Adaptive Equalization. IEEE SigPort. http://sigport.org/932
Baki Berkay Yilmaz, Alper T. Erdogan, 2016. Compressed Training Adaptive Equalization. Available at: http://sigport.org/932.
Baki Berkay Yilmaz, Alper T. Erdogan. (2016). "Compressed Training Adaptive Equalization." Web.
1. Baki Berkay Yilmaz, Alper T. Erdogan. Compressed Training Adaptive Equalization [Internet]. IEEE SigPort; 2016. Available from : http://sigport.org/932

Adaptive Sparsity Tradeoff for L1-Constraint NLMS Algorithm


Embedding the l1 norm in gradient-based adaptive filtering is a popular solution for sparse plant estimation. Supported on the modal analysis of the adaptive algorithm near steady state, this work shows that the optimal sparsity tradeoff depends on filter length, plant sparsity and signal-to-noise ratio. In a practical implementation, these terms are obtained with an unsupervised mechanism tracking the filter weights. Simulation results prove the robustness and superiority of the novel adaptive-tradeoff sparsity-aware method.

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Authors:
Abdullah Alshabilli, Shihab Jimaa
Submitted On:
19 March 2016 - 12:32pm
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[1] Abdullah Alshabilli, Shihab Jimaa, "Adaptive Sparsity Tradeoff for L1-Constraint NLMS Algorithm", IEEE SigPort, 2016. [Online]. Available: http://sigport.org/825. Accessed: May. 25, 2019.
@article{825-16,
url = {http://sigport.org/825},
author = {Abdullah Alshabilli; Shihab Jimaa },
publisher = {IEEE SigPort},
title = {Adaptive Sparsity Tradeoff for L1-Constraint NLMS Algorithm},
year = {2016} }
TY - EJOUR
T1 - Adaptive Sparsity Tradeoff for L1-Constraint NLMS Algorithm
AU - Abdullah Alshabilli; Shihab Jimaa
PY - 2016
PB - IEEE SigPort
UR - http://sigport.org/825
ER -
Abdullah Alshabilli, Shihab Jimaa. (2016). Adaptive Sparsity Tradeoff for L1-Constraint NLMS Algorithm. IEEE SigPort. http://sigport.org/825
Abdullah Alshabilli, Shihab Jimaa, 2016. Adaptive Sparsity Tradeoff for L1-Constraint NLMS Algorithm. Available at: http://sigport.org/825.
Abdullah Alshabilli, Shihab Jimaa. (2016). "Adaptive Sparsity Tradeoff for L1-Constraint NLMS Algorithm." Web.
1. Abdullah Alshabilli, Shihab Jimaa. Adaptive Sparsity Tradeoff for L1-Constraint NLMS Algorithm [Internet]. IEEE SigPort; 2016. Available from : http://sigport.org/825

PERFORMANCE LIMITS OF SINGLE-AGENT AND MULTI-AGENT SUB-GRADIENT STOCHASTIC LEARNING

Paper Details

Authors:
Ali H. Sayed
Submitted On:
19 March 2016 - 11:41am
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[1] Ali H. Sayed, "PERFORMANCE LIMITS OF SINGLE-AGENT AND MULTI-AGENT SUB-GRADIENT STOCHASTIC LEARNING", IEEE SigPort, 2016. [Online]. Available: http://sigport.org/820. Accessed: May. 25, 2019.
@article{820-16,
url = {http://sigport.org/820},
author = {Ali H. Sayed },
publisher = {IEEE SigPort},
title = {PERFORMANCE LIMITS OF SINGLE-AGENT AND MULTI-AGENT SUB-GRADIENT STOCHASTIC LEARNING},
year = {2016} }
TY - EJOUR
T1 - PERFORMANCE LIMITS OF SINGLE-AGENT AND MULTI-AGENT SUB-GRADIENT STOCHASTIC LEARNING
AU - Ali H. Sayed
PY - 2016
PB - IEEE SigPort
UR - http://sigport.org/820
ER -
Ali H. Sayed. (2016). PERFORMANCE LIMITS OF SINGLE-AGENT AND MULTI-AGENT SUB-GRADIENT STOCHASTIC LEARNING. IEEE SigPort. http://sigport.org/820
Ali H. Sayed, 2016. PERFORMANCE LIMITS OF SINGLE-AGENT AND MULTI-AGENT SUB-GRADIENT STOCHASTIC LEARNING. Available at: http://sigport.org/820.
Ali H. Sayed. (2016). "PERFORMANCE LIMITS OF SINGLE-AGENT AND MULTI-AGENT SUB-GRADIENT STOCHASTIC LEARNING." Web.
1. Ali H. Sayed. PERFORMANCE LIMITS OF SINGLE-AGENT AND MULTI-AGENT SUB-GRADIENT STOCHASTIC LEARNING [Internet]. IEEE SigPort; 2016. Available from : http://sigport.org/820

Slides for I-SM-PUAP algorithm presentation


In this presentation, we present an improved set-membership partial-update
affine projection (I-SM-PUAP) algorithm, aiming at
accelerating the convergence, and decreasing the update rates
and the computational complexity of the set-membership
partial-update affine projection (SM-PUAP) algorithm. To
meet these targets, we constrain the weight vector perturbation
to be bounded by a hypersphere instead of the threshold
hyperplanes as in the standard algorithm. We use the distance
between the present weight vector and the expected update

Paper Details

Authors:
Paulo S. R. Diniz, Hamed Yazdanpanah
Submitted On:
15 March 2016 - 8:58pm
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[1] Paulo S. R. Diniz, Hamed Yazdanpanah, "Slides for I-SM-PUAP algorithm presentation", IEEE SigPort, 2016. [Online]. Available: http://sigport.org/699. Accessed: May. 25, 2019.
@article{699-16,
url = {http://sigport.org/699},
author = {Paulo S. R. Diniz; Hamed Yazdanpanah },
publisher = {IEEE SigPort},
title = {Slides for I-SM-PUAP algorithm presentation},
year = {2016} }
TY - EJOUR
T1 - Slides for I-SM-PUAP algorithm presentation
AU - Paulo S. R. Diniz; Hamed Yazdanpanah
PY - 2016
PB - IEEE SigPort
UR - http://sigport.org/699
ER -
Paulo S. R. Diniz, Hamed Yazdanpanah. (2016). Slides for I-SM-PUAP algorithm presentation. IEEE SigPort. http://sigport.org/699
Paulo S. R. Diniz, Hamed Yazdanpanah, 2016. Slides for I-SM-PUAP algorithm presentation. Available at: http://sigport.org/699.
Paulo S. R. Diniz, Hamed Yazdanpanah. (2016). "Slides for I-SM-PUAP algorithm presentation." Web.
1. Paulo S. R. Diniz, Hamed Yazdanpanah. Slides for I-SM-PUAP algorithm presentation [Internet]. IEEE SigPort; 2016. Available from : http://sigport.org/699

Locating Salient Group-Structured Image Features via Adaptive Compressive Sensing


In this paper we consider the task of locating salient group-structured features in potentially high-dimensional images; the salient feature detection here is modeled as a Robust Principal Component Analysis problem, in which the aim is to locate groups of outlier columns embedded in an otherwise low rank matrix.

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Authors:
Jarvis Haupt
Submitted On:
23 February 2016 - 1:44pm
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[1] Jarvis Haupt, "Locating Salient Group-Structured Image Features via Adaptive Compressive Sensing", IEEE SigPort, 2015. [Online]. Available: http://sigport.org/495. Accessed: May. 25, 2019.
@article{495-15,
url = {http://sigport.org/495},
author = {Jarvis Haupt },
publisher = {IEEE SigPort},
title = {Locating Salient Group-Structured Image Features via Adaptive Compressive Sensing},
year = {2015} }
TY - EJOUR
T1 - Locating Salient Group-Structured Image Features via Adaptive Compressive Sensing
AU - Jarvis Haupt
PY - 2015
PB - IEEE SigPort
UR - http://sigport.org/495
ER -
Jarvis Haupt. (2015). Locating Salient Group-Structured Image Features via Adaptive Compressive Sensing. IEEE SigPort. http://sigport.org/495
Jarvis Haupt, 2015. Locating Salient Group-Structured Image Features via Adaptive Compressive Sensing. Available at: http://sigport.org/495.
Jarvis Haupt. (2015). "Locating Salient Group-Structured Image Features via Adaptive Compressive Sensing." Web.
1. Jarvis Haupt. Locating Salient Group-Structured Image Features via Adaptive Compressive Sensing [Internet]. IEEE SigPort; 2015. Available from : http://sigport.org/495

Low-Complexity Digital Correction of 4-Channel Time-Interleaved ADC Frequency Response Mismatch using Adaptive I/Q Signal Processing


4 TI_ADC

Low-Complexity Digital Correction of 4-Channel Time-Interleaved ADC Frequency Response Mismatch using Adaptive I/Q Signal Processing

Paper Details

Authors:
Simran Singh, Michael Epp, Wolfgang Schlecker and Mikko Valkama
Submitted On:
23 February 2016 - 1:44pm
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[1] Simran Singh, Michael Epp, Wolfgang Schlecker and Mikko Valkama, "Low-Complexity Digital Correction of 4-Channel Time-Interleaved ADC Frequency Response Mismatch using Adaptive I/Q Signal Processing", IEEE SigPort, 2015. [Online]. Available: http://sigport.org/433. Accessed: May. 25, 2019.
@article{433-15,
url = {http://sigport.org/433},
author = {Simran Singh; Michael Epp; Wolfgang Schlecker and Mikko Valkama },
publisher = {IEEE SigPort},
title = {Low-Complexity Digital Correction of 4-Channel Time-Interleaved ADC Frequency Response Mismatch using Adaptive I/Q Signal Processing},
year = {2015} }
TY - EJOUR
T1 - Low-Complexity Digital Correction of 4-Channel Time-Interleaved ADC Frequency Response Mismatch using Adaptive I/Q Signal Processing
AU - Simran Singh; Michael Epp; Wolfgang Schlecker and Mikko Valkama
PY - 2015
PB - IEEE SigPort
UR - http://sigport.org/433
ER -
Simran Singh, Michael Epp, Wolfgang Schlecker and Mikko Valkama. (2015). Low-Complexity Digital Correction of 4-Channel Time-Interleaved ADC Frequency Response Mismatch using Adaptive I/Q Signal Processing. IEEE SigPort. http://sigport.org/433
Simran Singh, Michael Epp, Wolfgang Schlecker and Mikko Valkama, 2015. Low-Complexity Digital Correction of 4-Channel Time-Interleaved ADC Frequency Response Mismatch using Adaptive I/Q Signal Processing. Available at: http://sigport.org/433.
Simran Singh, Michael Epp, Wolfgang Schlecker and Mikko Valkama. (2015). "Low-Complexity Digital Correction of 4-Channel Time-Interleaved ADC Frequency Response Mismatch using Adaptive I/Q Signal Processing." Web.
1. Simran Singh, Michael Epp, Wolfgang Schlecker and Mikko Valkama. Low-Complexity Digital Correction of 4-Channel Time-Interleaved ADC Frequency Response Mismatch using Adaptive I/Q Signal Processing [Internet]. IEEE SigPort; 2015. Available from : http://sigport.org/433

Recursive Filters with Bayesian Quadratic Network Game Fusion


Distributed filter in networks mainly involves two stages, local estimation by private observation and information fusion with neighbor nodes based on the underlying topology. Since Bayesian game is a powerful tool to analyze the interaction equilibrium of multi-player with incomplete information in networks, we combine the recursive LMMSE filter with network game of quadratic utilities under the Bayesian filtering framework. In our algorithm, the nodes update their local beliefs on the unknown state by private observations and historical actions from neighbors in network.

Paper Details

Authors:
Muyuan Zhai, Tao Yang, Bo Hu
Submitted On:
23 February 2016 - 1:38pm
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[1] Muyuan Zhai, Tao Yang, Bo Hu, "Recursive Filters with Bayesian Quadratic Network Game Fusion", IEEE SigPort, 2015. [Online]. Available: http://sigport.org/287. Accessed: May. 25, 2019.
@article{287-15,
url = {http://sigport.org/287},
author = {Muyuan Zhai; Tao Yang; Bo Hu },
publisher = {IEEE SigPort},
title = {Recursive Filters with Bayesian Quadratic Network Game Fusion},
year = {2015} }
TY - EJOUR
T1 - Recursive Filters with Bayesian Quadratic Network Game Fusion
AU - Muyuan Zhai; Tao Yang; Bo Hu
PY - 2015
PB - IEEE SigPort
UR - http://sigport.org/287
ER -
Muyuan Zhai, Tao Yang, Bo Hu. (2015). Recursive Filters with Bayesian Quadratic Network Game Fusion. IEEE SigPort. http://sigport.org/287
Muyuan Zhai, Tao Yang, Bo Hu, 2015. Recursive Filters with Bayesian Quadratic Network Game Fusion. Available at: http://sigport.org/287.
Muyuan Zhai, Tao Yang, Bo Hu. (2015). "Recursive Filters with Bayesian Quadratic Network Game Fusion." Web.
1. Muyuan Zhai, Tao Yang, Bo Hu. Recursive Filters with Bayesian Quadratic Network Game Fusion [Internet]. IEEE SigPort; 2015. Available from : http://sigport.org/287

Bags of Affine Subspaces for Robust Object Tracking


object tracking results

We propose an adaptive tracking algorithm where the object is modelled as a continuously updated bag of affine subspaces, with each subspace constructed from the object's appearance over several consecutive frames. In contrast to linear subspaces, affine subspaces explicitly model the origin of subspaces. Furthermore, instead of using a brittle point-to-subspace distance during the search for the object in a new frame, we propose to use a subspace-to-subspace distance by representing candidate image areas also as affine subspaces.

Paper Details

Authors:
Sareh Shirazi, Conrad Sanderson, Chris McCool, Mehrtash Harandi
Submitted On:
23 February 2016 - 1:43pm
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[1] Sareh Shirazi, Conrad Sanderson, Chris McCool, Mehrtash Harandi, "Bags of Affine Subspaces for Robust Object Tracking", IEEE SigPort, 2015. [Online]. Available: http://sigport.org/185. Accessed: May. 25, 2019.
@article{185-15,
url = {http://sigport.org/185},
author = {Sareh Shirazi; Conrad Sanderson; Chris McCool; Mehrtash Harandi },
publisher = {IEEE SigPort},
title = {Bags of Affine Subspaces for Robust Object Tracking},
year = {2015} }
TY - EJOUR
T1 - Bags of Affine Subspaces for Robust Object Tracking
AU - Sareh Shirazi; Conrad Sanderson; Chris McCool; Mehrtash Harandi
PY - 2015
PB - IEEE SigPort
UR - http://sigport.org/185
ER -
Sareh Shirazi, Conrad Sanderson, Chris McCool, Mehrtash Harandi. (2015). Bags of Affine Subspaces for Robust Object Tracking. IEEE SigPort. http://sigport.org/185
Sareh Shirazi, Conrad Sanderson, Chris McCool, Mehrtash Harandi, 2015. Bags of Affine Subspaces for Robust Object Tracking. Available at: http://sigport.org/185.
Sareh Shirazi, Conrad Sanderson, Chris McCool, Mehrtash Harandi. (2015). "Bags of Affine Subspaces for Robust Object Tracking." Web.
1. Sareh Shirazi, Conrad Sanderson, Chris McCool, Mehrtash Harandi. Bags of Affine Subspaces for Robust Object Tracking [Internet]. IEEE SigPort; 2015. Available from : http://sigport.org/185

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