Welcome to the internet home of the Adaptive Signal Processing and Information Theory Research Group, directed by Prof. John MacLaren Walsh in the Department of Electrical and Computer Engineering, Drexel University.

Some of the broad areas in which we conduct research include:

News

05/21/2014

Gwanmo Ku defensed his PHD thesis on Efficient Control Signaling for Resource Allocation. slides.

05/06/2014, 05/13/2014

Yunshu Liu presents an introduction to Dual Decomposition for Inference(from papers by D. Sontag, A. Globerson and T. Jaakkola) in group meeting. slides.

04/29/2014, 05/01/2014

Mengke Hu and David Cinciruk presents an Introduction to the Patent Field in group meeting. slides.

04/22/2014,04/24/2014

Jie Ren presents an intro. to Space Time Coding in group meeting. slides

04/15/2014

Congduan Li presents The simplest index coding problem requiring a non-Shannon inequality in group meeting. slides

03/19/2014

Jayant Apte presents Exact Pepair Problems with Multiple Sources at The 48th annual IEEE Conference on Information Sciences and Systems(CISS) at Princeton, NJ, USA. Program, Paper, slides

03/19/2014

Bradford D. Boyle presents Distributed Scalar Quantizers for Subband Allocation at The 48th annual IEEE Conference on Information Sciences and Systems(CISS) at Princeton, NJ, USA. Program, Paper, slides

03/19/2014

Jie Ren presents Interactive Communication for Resource Allocation at The 48th annual IEEE Conference on Information Sciences and Systems(CISS) at Princeton, NJ, USA. Program, Paper, slides

03/04/2014, 03/06/2014

Yunshu Liu presents an introduction to Independence Models with focus on Gaussian distributional framework(from papers by Petr Simecek and Radim Lnenicka) in group meeting. slides.

02/25/2014, 02/27/2014

Jayant Apte presents an intro. to Polyhedral Description Conversion up to Symmetries(from thesis by Thomas Rehn) in group meeting. slides.

02/18/2014, 02/20/2014

Congduan Li presents An equivalence between network coding and index coding(A paper by Effros, Rouayheb, Langberg) in group meeting. slides

02/11/2014

Dr. Walsh to speak about Calculating rate regions for network coding and distributed storage via polyhedral projection and representable matroid enumeration at the Information Theory and Applications Workshop(2014) at UC San Diego. Program,slides.

12/16/2013

Gwanmo Ku submitted "Resource Allocation and Link Adaptation in LTE & LTE Advanced: A Tutorial" to IEEE Communications Surveys and Tutorials on December 16, 2013.

11/26/2013

Jayant Apte presents an intro. to Entropic Inequalities and Marginal Problems in group meeting. slides.

10/29/2013, 11/21/2013

Alexander Erick Trofimoff presents an intro. to analytical approach to enumerate binary matroids with focus on Burnside's lemma in group meeting.

10/17/2013, 10/22/2013

Yunshu Liu presents an intro. to Information Geometric view of Belief Propagation in group meeting. slides.

10/03/2013

Congduan Li presents Matroid bounds on the Region of entropic vectors at the 51st Annual Allerton Conference on Communication, Control and Computing at Urbana, IL, USA. Program, Paper, slides

09/13/2013

Dr. Walsh to speak about Bounding the Entropic Region via Information Geometry at 2013 IEEE Information Theory Workshop at Seville, Spain. Program, Paper, slides

08/08/2013, 08/09/2013

Alexander Erick Trofimoff presents an intro. to Matroid representations by partitions in group meeting.

07/16/2013, 07/30/2013, 08/01/2013

Yunshu Liu presents an intro. to Graphical Models and Message passing in group meeting. slides.

07/23/2013, 07/25/2013

Congduan Li presents an intro. to Matroid bounds on the Region of entropic vectors in group meeting.

07/09/2013, 07/11/2013

Jayant Apte presents an intro. to Network Coding for Distributed Storage Systems in group meeting.slides

06/08/2013

Congduan Li present about A new computational approach for determining rate regions and optimal codes for coded networks at the 2013 IEEE International Symposium on Network Coding(NetCod 2013) at Calgary, Canada. Program, Paper,slides,Poster, Video.

05/30/2013

Bradford Boyle to present about Channel Dependent Adaptive Modulation and Coding without Channel State Information at the transmitter at 38th IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013) at Vancouver, Canada. Program, slides, Paper.

05/14/2013, 05/17/2013, 05/21/2013

Gwanmo Ku presents an intro. to Limited Feedback in Wireless Communication Systems in group meeting.

04/26/2013,04/30/2013, 05/03/2013, 05/07/2013

Jie Ren presents an intro. to Variable-Rate Channel Capacity in group meeting. slides

04/16/2013

Dr. Walsh to speak about Entropic Vectors: Polyhedral Computation and Information Geometry at First Workshop on Entropy and Information Inequalities at Hong Kong. Program, slides, Video.

03/26/2013, 03/29/2013

Jayant Apte presents an intro. to Polyhedral Description Conversion up to symmetries with a focus on group theory in group meeting.slides

03/22/2013

Dan Venutolo presents an intro. to Non-Shannon Information Inequalities of Four Random Variables in group meeting.

03/13/2013, 03/15/2013

Yunshu Liu presents an intro. to Non-Shannon Information Inequalities of Four Random Variables in group meeting. slides.

03/08/2013

David Cinciruk presents an intro. to Nuisance Attribute Projection in group meeting.

03/06/2013

David Cinciruk presents an intro. to Support Vector Machines and Speaker Verification in group meeting. slides.

02/27/2013, 03/01/2013

Jie Ren presents an intro. to Incremental Coding over MIMO Channels in group meeting.

02/20/2013, 02/22/2013

Yunshu Liu presents an intro. to Conditional Independence Relations in group meeting. slides.

02/11/2013

Dr. Walsh to speak about Entropic Vectors: Polyhedral Computation and Information Geometry at the Information Theory and Applications Workshop at UC San Diego. slides.

02/06/2013, 02/08/2013

Mengke Hu presents an intro. to Joint Factor Analysis in group meeting. slides.

01/30/2013, 02/01/2013

Congduan Li presents an intro. to the Inequalities for Shannon Entropy and Linear ranks in group meeting. slides.

01/25/2013

Gwanmo Ku presents an intro. to OFDMA resource control in group meeting. slides.

01/16/2013,01/18/2013, 01/23/2013

Jie Ren presents an intro. to Rateless Codes in group meeting. slides.

01/11/2013

David Cinciruk presents an intro. to Feature mapping in group meeting. slides.

01/09/2013

Mengke Hu presents an intro. to comparasion between JFA, FDIC and fNap in group meeting. slides.

12/19/2012

Dr. Walsh to speak about Overhead Performance Tradeoffs in Distributed Wireless Networks at the AFOSR Complex Networks Program Review at Washington, D.C. slides.

12/05/2012

Congduan Li give a briefing of Senior design project in group meeting.

11/30/2012

Gwanmo Ku presents an intro. to Gaussian MIMO broadcast channel in group meeting. slides.

11/14/2012,11/16/2012, 11/28/2012

Jie Ren presents an intro. to coding for computation in group meeting. slides.

10/17/2012, 10/19/2012, 10/24/2012, 11/09/2012

Gwanmo Ku presents an intro. to general broadcast channel and dirty paper coding in group meeting. slides.

10/10/2012, 10/12/2012

Mengke Hu presents an intro. to Joint Factor Analysis for Speaker Verification in group meeting. slides.

10/03/2012, 10/05/2012

Jayant Apte presents an intro. to Polyhedral Computation in group meeting. slides.

08/15/2012, 08/17/2012,08/22/2012,08/27/2012,08/29/2012

Jie Ren presents an intro. to Interactive Communication in group meeting.slides.

08/2012

ASPITRG welcomes it's newest member, Jie Ren.

08/03/2012, 08/08/2012,08/10/2012

Emmanuel Oyekanlu presents an review to Collaborative Estimation on Distributed Networks in group meeting.slides.

07/25/2012, 08/01/2012

Mengke Hu presents an intro. to Log Spectra Enhancement for Speaker Verification in group meeting. slides.

07/13/2012, 07/17/2012, 07/20/2012

David Cinciruk presents an intro. to Nuisance attribute projection(NAP) in group meeting. slides.

06/29/2012, 07/11/2012

Jayant Apte presents an intro. to Lexicographic Reverse Search(LRS) in group meeting. slides.

06/22/2012, 06/27/2012

Mengke Hu presents an intro. to Autotools in group meeting. slides.

06/15/2012

Gwanmo Ku presents an intro. to adaptive modulation and coding in LTE in group meeting. slides.

06/2012

ASPITRG welcomes it's newest member, Mengke Hu.

06/08/2012

Jayant Apte presents an intro. to the CUDA C in group meeting. slides.

05/25/2012, 06/01/2012

Congduan Li presents an intro. to the construction of networks from matroids in group meeting. slides.

05/11/2012

Congduan Li presents an intro. to fundamental problems in networks in group meeting. slides.

04/27/2012

Gwanmo Ku presents an intro. to Scheduling in the LTE 4G standard in group meeting. slides.

04/13/2012, 04/20/2012

Yunshu Liu presents an intro. to manifold of probability distribution in group meeting. slides.

04/2012

ASPITRG welcomes it's newest member, Jayant Apte.

4/2/2012:

ASPITRG has received a grant from the Air Force Office of Scientific Research to study the fundamental relationship between the amount of overhead control information and resource allocation performance in wireless networks. The research effort will be a collaboration between Leonard J. Cimini (PI - Univ. of Delaware), Javier Garcia-Frais (co-PI - Univ. of Delaware), John MacLaren Walsh (PI - Drexel University), and Steven Weber (co-PI - Drexel University).

03/01/2012

Sivagnanasundaram Ramanan's paper "Practical Codes for Collaborative Estimation'' is scheduled to appear in June or July of IEEE Transactions on Signal Processing 2012.

02/24/2012

David Cinciruk presents an intro. to Speaker Recognition in group meeting. slides.

02/10/2012, 02/17/2012

Yunshu Liu presents an intro. to Information Geometry in group meeting. slides.

02/07/2012

Dr. Walsh to speak about Characterizing the Region of Entropic Vectors via Information Geometry at the Information Theory and Applications Workshop at UC San Diego.

01/20/2012, 01/27/2012

Yunshu Liu presents an intro. to differential geometry in group meeting.

11/18/2011,12/02/2011

Congduan Li presents an intro. to matroid theory with a focus on matroid operations in group meeting. slides.

11/11/2011

Gwanmo Ku presents an intro. to resource allocation in the LTE 4G standard. slides.

11/4/2011

Gwanmo Ku presents an overview of the structure of the PHY in the LTE 4G standard. slides.

10/21/2011,10/28/2011

Congduan Li presents an intro. to matroid theory in group meeting. slides.

9/20/2011

ASPITRG welcomes it's newest member, Emmanuel Oyekanlu.

8/24/2011

ASPITRG welcomes it's newest member, Yunshu Liu.

7/28/2011

Sivagnanasundaram Ramanan defends his Ph.D. Dissertation "Collaborative Estimation in Networks".

6/14/2011

Dr. Walsh and the ASPITRG have been awarded the CAREER award by the National Science Foundation for the project " Entropy Geometry in Variational Inference Signal Processing ".

6/12/2011

ASPITRG welcomes it's newest member, Congduan Li.

6/10/2011

ASPITRG Undergraduate Researcher Linda McLaughlin bids farewell to ASPITRG and begins graduate research career at Cornell University.

6/08/2011

Ciira Maina defends his Ph.D. Dissertation " Approximate Bayesian Inference for Robust Speech Processing ".

6/01/2011

Dr. Walsh and Dr. Weber's paper " A Recursive Construction of the Set of Binary Entropy Vectors and Related Algorithmic Inner Bounds for the Entropy Region" has been accepted for publication in the IEEE Transactions on Information Theory.

5/27/2011

Sivagnanasundaram Ramanan submitted the manuscript " Practical Codes for Collaborative Estimation " to the IEEE Transactions on Signal Processing.

5/02/2011

Dr. Walsh, together with Dr. Weber, Dr. de Oliveira, Dr. Muriel Medard (MIT), and Dr. Atilla Eryilmaz (Ohio State Univ.), guest edited the May 2011 issue of the IEEE Journal on Selected Areas in Communications. The issue was about rate delay tradeoffs at the application and transport layers.

3/29/2011

Dr. Walsh and Dr. Weber submitted a revised version of the manuscript " A Recursive Construction of the Set of Binary Entropy Vectors and Related Algorithmic Inner Bounds for the Entropy Region " to the IEEE Transactions on Information Theory.

3/14/2011

Ciira wa Maina submitted the paper " Log Spectra Enhancement using Speaker Dependent Priors for Speaker Verification " to the IEEE Transactions on Audio, Speech, and Language Processing.

2/4/2011

Ciira wa Maina's paper "Compensating for Noise and Mismatch in Speaker Verification Systems Using Approximate Bayesian Inference" has been selected to appear at CISS 2011.

1/18/2011

Sivagnanasundaram Ramanan's paper "Practical Codes for Lossy Compression when Side Information May be Absent" and Ciira wa Maina's paper "Log Spectra Enhancement using Speaker Dependent Priors for Speaker Verification" have been selected to appear at IEEE ICASSP 2011.

1/03/2011

Dr. Walsh to speak about collaborative estimation algorithms at the Information Theory and Applications Workshop at UC San Diego.

12/06/2010

Gwanmo Ku's paper titled " Power amplifier nonlinearity effects on OFDM subcarrier transmit beamforming" has been accepted to the IEEE Wireless Communications and Networking Conference (WCNC), 2011.

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