VISWANADHA REDDY Electronics Engineer GE - Global Research John F Welch Technology Center Bangalore, INDIA Tel: +91 (080) 5033476 (O), +91 (080) 5290504 (H) Email: viswanadhareddy.p@geind.ge.com pvisnath@protocol.ece.iisc.ernet.in EDUCATION M. Sc Electrical Communication Engineering Jan 2002 Indian Institute of Science, Bangalore, INDIA Thesis: Some Design Approaches for Causal Stable IIR and FIR perfect Reconstruction Filter Banks. Thesis Advisor: Prof. Anamitra Makur Cumulative Grade Point Index (CGPI - 6.3/8.0) B. Tech Electroncis and Coomunication Engineering June 1999 Sri Venkateswara University College of Engineering (SVUCE), Tirupati, INDIA Thesis: Signal Extraction using Artificial Neural Networks. Percentage ( 83.5/100) RESEARCH INTERESTS Mathematical System Theory ( Algebriac and Differential Geometric methods), Applied Operator theory. RESEARCH PROJECTS 1. Biorthogonal FIR Perfect Reconstruction Filter Banks (PRFB) - Characterization: The focus of this work is a way of obtaining two polynomial matrices, of finite degree, such that their product is a delay. We used spectral theory of regular matrix polynomials to characterize such pairs for a given delay. Explicit expressions for the forward and inverse systems are given interms of Eigen values and Jordan chains. Interpretations on the behavior of eigen values for special cases of interest such as linear phase and unimodular are studied. ([1],[4] and [8]) 2. Causal Stable IIR PRFBs - Design: In this work, we proposed a way to obtain two rational matrix functions (RMF) such that their product is unity and poles of both RMFs are inside unit circle, ensuring stability. The RMFs are realized in state space form (MIMO) and minimality (non redundant representation of the system) is ensured. Two design methods a) Minimal factroziation - In this design, both the forward and inverse systems with Mcmilan degree m are realized as a cascade of degree one blocks, theory of chain of invariant subspaces is used to obtain such a design. ([2],[5] and [8]) b) Jordan Decompostion - In this design [3][6], the state transition matrices of the forward and inverse systems are related using function of a matrix and similarity transformation for a causal stable design. ([3],[6] and [8]) 3. Multidimensional System thoery - M dimensional Filter bank design, Grobner basis methods. 4. Image Denoising using adaptive wavelets. 5. Finite Element Modeling of Electromagnetics. 6. Image Enhancement using Anisoptrpic diffusion. 7. Visualization techniques for large data sets [7]. PAPERS [1]. Anamitra Makur, A. Muthuvel, P. Viswanadha Reddy, "Eigenstructure approach for complete characterization of linear phase FIR PR length 2M filterbanks," IEEE Transactions on Signal Processing, to be published [2]. P. Viswanadha Reddy, Anamitra Makur, "M Channel Causal Stable IIR Perfect Reconstruction Filter Bank Design Using Minimal Factorization," IEEE Transactions on Signal Processin, in Review. [3]. P. Viswanadha Reddy, Anamitra Makur, "M Channel Causal Stable IIR Perfect Reconstruction Filter Bank Design Using Jordan Decomposition," IEEE Transactions on Circuits and Systems - II, submitted. [4]. P. Viswanadha Reddy, Anamitra Makur, "Design of M channel bi orthogonal FIR perfect reconstruction filter banks using spectral theory of matrix polynomials," International Conference on Information, Communication & Signal Processing (ICICS 2003), December 2003, Singapore. [5]. P. Viswanadha Reddy, Anamitra Makur, "M channel causal stable IIR perfect reconstruction filter bank design using minimal factorization," International Conference on Information, Communication & Signal Processing (ICICS 2003), December 2003, Singapore. [6]. P. Viswanadha Reddy, Anamitra Makur, "Design of M channel IIR causal stable perfect reconstruction filter banks using similarity transformation," IEEE International Conference on Image Processing (ICIP 2003), September 2003, Barcelona, SPAIN. [7]. Narendra Asnani, Pisupati Preeti, P. Viswanadha Reddy, Sheri George, "Data reduction as a technique for visualization of large data volume", NDE -2003, December 2003, Thiruvananthapuram, INDIA. THESIS [8]. "Some design approaches for casual stable IIR and FIR perfect reconstruction filter banks:" by P. Vishwanadha Reddy.-- Bangalore: Indian institute of science, 2002. ix, 89p. (IISc, Dept of ECE, MSc Thesis). 621.3822 P02 "THESIS" G16814. COURSE WORK during MSc. Credit -- Linear Algebra, Estimation Identificaiton and Modeling, Time Frequency Analysis Digital Signal Compression, Image Processing, Selected Topics in Image Processing. Audit -- Analysis -1, Functional Analysis, Algebra, Nonlinear Oscillations. WORK EXPERIENCE Electronics Engineer (April '02 - Present) Industrial Imaging and Modeling Group, General Electric - Global Research, John F. Welch Technology Center, Bangalore, INDIA. HONORS 1. Research assistantship for during Masters studies. 2. Student member of IETE. 3. All India Rank of 72 in Graduate Aptitude Test in Engineering-2000 conducted by Indian Institute of Technology (IITs) and Indian Institute of Science (IISc). 4. Ranked Second Department of Electronics and Communication Engineering in a class of 30, in Sri Venkateswara University during under graduate studies. REFERENCES 1. Anamitra Makur, Associate Professor Department Electrical and Electronic Engineering Nanyang Technological University, SINGAPORE Email: eamakur@ntu.edu.sg 2. A. G. Ramakrishnan, Associate Professor Department of Electrical Engineering, Indian Institute of Science, Bangalore, INDIA Email: ramkiag@ee.iisc.ernet.in