Institut für Mathematik

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Publikationen

Journal Publications

C. Kelley, D. Sridhara, J. Rosenthal
Zig-Zag and Replacement Product Graphs and LDPC Codes
Advances in Mathematics of Communications, vol 2, no. 4 (2008), 347--372. PDF   arXiv:cs/0611155

C. Kelley, D. Sridhara
Eigenvalue bounds on the pseudocodeword weight of expander codes
Submitted to the journal of Advances in Mathematics of Communications. (Submitted: Sept. 2006; Revised: Jan. 2007) PDF  

C. Kelley, D. Sridhara, J. Rosenthal
Tree-Based Construction of LDPC Codes Having Good Pseudocodeword Weights
IEEE Transactions on Information Theory, 53(4): 1460-1478, 2007. PDF  

C. Kelley, D. Sridhara
Pseudocodewords of Tanner Graphs
Submitted to IEEE Transactions on Information Theory PDF  

D. Sridhara, T. E. Fuja
LDPC Codes over Rings for PSK Modulation
IEEE Transactions on Information Theory, vol. 51, no. 9, pp. 3209 -- 3200, Sept. 2005. PDF  

R. M. Tanner, D. Sridhara, A. Sridharan, D. J. Costello, Jr., T. E. Fuja
LDPC Block and Convolutional Codes Based on Circulant Matrices
IEEE Transactions on Information Theory, vol. 50, no. 12, pp. 2966--2984, Dec 2004. PDF  

D. Sridhara
Efficient Coding of Information: Huffman Coding
RESONANCE, India Journal, (Invited Paper), pp. 51-73. Feb. 2006.   

Conference Publications

C. Kelley, D. Sridhara, J. Rosenthal
Pseudocodeword weights for non-binary LDPC codes.
In Proceedings of the 2006 IEEE international Symposium on Informaion Theory, pages 1379 - 1383, Seattle, USA, 2006. PDF  

D. Sridhara, C. Kelley
LDPC Coding for the Three Terminal Erasure Relay Channel.
Proceedings of the 2006 IEEE International Symposium on Information Theory, July 9-14, 2006, Seattle, USA. PDF  

D. Sridhara, C. Kelley, J. Rosenthal
Tree-Based construction of LDPC codes.
In Proceedings of the 2005 IEEE international Symposium on Informaion Theory, pages 845-849, Adelaide, Australia, 2005. PDF  

C. Kelley, D. Sridhara
Structure of Pseudocodewords in Tanner Graphs
Proceedings of the International Symposium on Information Theory and its Applications, October 2004, Parma, Italy.   

C. Kelley, D. Sridhara, J. Xu, J. Rosenthal
Pseudocodeword weights and stopping sets.
In Proceedings of the 2004 IEEE International Symposium on Information Theory, page 67, Chicago, 2004. PDF  

C. Kelley, J. Rosenthal, D. Sridhara
Some new algebraic constructions of codes from graphs which are good expanders.
In Proc. of the 41st Allerton Conference on Communication, Control, and Computing, pages 1280-1289, 2003. PDF  

A. Sridharan, D. Sridhara, D. J. Costello, Jr., T. E. Fuja
An irregular construction for low-density parity check convolutional Codes.
Proceedings of the IEEE Intl. Symposium on Information Theory, Yokohama, Japan. PDF  

D. Sridhara, T. E. Fuja
Low density parity check codes over groups and rings
Proceedings of 2002 IEEE Information Theory Workshop, Bangalore, India. PDF  

R. M. Tanner, A. Sridharan, D. Sridhara, D. J. Costello, Jr., T. E. Fuja
A construction of low density parity check convolutional codes based on quasi-cyclic block codes
IEEE International Symposium on Information Theory, June 29--July 3, 2002, Laussane, Switzerland. PDF  

R. M. Tanner, D. Sridhara, T. E. Fuja
A class of group-structured LDPC codes
International Symposium on Communication Theory and Applications, Ambleside, U.K.   

D. Sridhara, T. E. Fuja
Bandwidth efficient modulation based on algebraic low density parity check codes.
Proceedings of the IEEE International Symposium on Information Theory, Washington D.C., June 2001. PDF  

D. J. Costello, Jr., D. Sridhara, A. Sridharan, R. M. Tanner
Low density parity check convolutional codes derived from quasi-cyclic codes
Blake Festschrift, June 7--8, 2001.   

D. Sridhara, T. E. Fuja, R. M. Tanner
Low density parity check codes from permutation matrices
Proceedings of Confernce on Information Sciences and Systems, (Johns Hopkins University, Baltimore, MD), March 2001.   

T. E. Fuja, D. Sridhara
D. Rahikka, J. Colluru, T. Fazel
Robust transmission of MELP-compressed speech: A tale of two channels.

2000 Midwest Symposium on Circuits and Sytems, (Lansing, MI), August 2000.   

D. Sridhara, T. E. Fuja
Performance of the U.S. Federal Standard 2.4 kbps MELP vocoder over ATM networks.
Conference on Information Sciences and Systems, March 15-17, 2000, (Princeton, NJ).