Telecommunications systems, digital and analog communications,
communication theory, error correcting codes, simulation
of communications systems, microwave propagation and
transmission, point-to-point radio transmission, interference
analysis of communications systems, spread spectrum
communications, cellular radio communications, light
wave communications, satellite communications, network
theory, optical communications, personal communications
systems, digital signal processing.
Dr. Prabhu joined the research area of AT&T Bell Laboratories
where he made significant contributions to communications
science and engineering. He was recognized as a Distinguished
Member of Technical Staff by Bell Laboratories for
his pioneering work in telecommunications. His contributions
span a variety of fields in electrical engineering.
Some of the major and fundamental contributions include
interference analysis of communications systems, error
rate performance of digital modulation systems, new
modulation techniques for cellular radio, error bounds
in digital systems, optical communications systems,
bandwidth and spatial optimization of radio networks
and digital radio transmission with anomalous propagation.
A substantial part of this work has had major impact
on the design of national and international communications
systems. It has appeared in text and reference books
on digital and analog communications and is widely
used. He has published extensively, conducted several
courses in communications systems and contributed
to three separate books on communications.