| 2008 | ISCAS | Efficient design of delta operator based 2-D IIR filters using symmetrical decomposition. | I-Hung Khoo, Hari C. Reddy, P. Karivaratha Rajan |
| 2005 | ISCAS | Generalized alpha-VSH polynomials and stability of delta-operator based 2D discrete-time systems. | Hari C. Reddy, P. Karivaratha Rajan |
| 2003 | ISCAS | Delta operator based 2-D filters: symmetry, stability, and design. | I-Hung Khoo, Hari C. Reddy, P. Karivaratha Rajan |
| 2001 | ISCAS | Delta operator based 2-D filter design using symmetry constraints. | I-Hung Khoo, Hari C. Reddy, P. Karivaratha Rajan |
| 1993 | ISCAS | Study of the compatibility of 1-D and 2-D bounded real functions. | Hari C. Reddy, P. Karivaratha Rajan |
| 1991 | ICASSP | Fast computation of DFT of 2-D data with symmetry about two diagonals. | Rathika Rajaravivarma, P. Karivaratha Rajan |
| 1985 | ICASSP | Application of symmetrical decomposition to 2-D FIR filter design. | P. Karivaratha Rajan, Harnatha C. Reddy |
| 1982 | ICASSP | Further results on 4-fold rotational symmetry in 2-D functions. | P. Karivaratha Rajan, Harnatha C. Reddy, M. N. Srikanta Swamy |
| 1981 | ICASSP | Design of two-dimensional digital filters using analog reference filters without second kind singularities. | Harnatha C. Reddy, P. Karivaratha Rajan, M. N. Srikanta Swamy |
| 1980 | ICASSP | Studies on N-dimensional filter transfer functions without second kind singularities. | C. H. Reddy, P. Karivaratha Rajan, M. N. S. Swamy |