1.B .D. Rao and K. V. S. Hari , “Analysis of Subspace Based Direction of Arrival Estimation Methods,” Sadhana -A Proceedings of Indian Academy of Sciences in Engineering Sciences Special Issue on Recent Advances in Digital Signal Processing  II, Vol. 16, Part 3, Pages: 183-194, Nov. 1991

2.B. D. Rao and K. V. S. Hari, “Weighted State Space Methods/ESPRIT and Spatial Smoothing,” IEEE International Conference on Acoustics, Speech and Signal Processing, Toronto, Canada, Vol. 5, Pages: 1893-1896, May. 1991

3.B .D. Rao, “Analysis of Roundoff  Noises in Floating Point Digital Filters,” IEEE International Conference on Acoustics, Speech and Signal Processing, Toronto, Canada, Vol. 2, Pages: 3317-3320, May. 1991

4.T. Soni, B. D. Rao, J.R. Zeidler, and W.H. Ku, “Enhancement of Images Using the 2-D LMS Adaptive Algorithm,” IEEE International Conference on Acoustics, Speech and Signal Processing, Toronto, Canada, Vol. 4, Pages: 3029-3033, May. 1991

5.T. Soni, J.R. Zeidler, B. D. Rao, and W.H.Ku, “Signal Enhancement in Noise and Clutter Corrupted Images Using Adaptive Predictive Filtering Techniques,” SPIE Conference 1565, Adaptive Signal Processing, San Diego, CA,  Pages: 338-344, Jul. 1991

6.P. Kuchibhotla and B. D. Rao, “Partitioning Considerations in Systolic Array Design,” IEEE Asilomar Conference on Signals, Systems and Computers, Monterey, CA, Vol. 1, Pages: 530-534, Nov. 1991

7.B. D. Rao, “Comparison of Spatially Smoothed Weighted Subspace Methods,” IEEE Asilomar Conference on Signals, Systems and Computers, Monterey, CA, Vol. 2, Pages: 903-907, Nov. 1991

8.B. D. Rao, “Numerical Considerations in Spectrum Estimation,” An Indo-US Workshop on Systems and Signal Processing, Pages: 83-84, Bangalore, India, January 8-12, 1988. B) An expanded version in Book of Proceedings of the Indo-US Workshop, Pages: 387-400, R.N. Madan, N. Viswanadham, and R.L. Kashyap, eds., Oxford and IBH Pub., 1991