New research in the field of mobile communication systems has evolved superior codes facilitating high-speed data transfer useful for voice, video and multimedia applications. The findings will lead to some ground-breaking changes in the upcoming fourth generation (4G) cell phones as well as in deep space and satellite communications.
M. Salim Engineer, Associate Professor at Malviya National Institute of Technology (MNIT) here who conducted the study titled “Investigation on turbo codes for improving performance of wireless fading channels” over the past six years, covering technical aspects of bandwidth, error performance and power requirement, told The Hindu that the improvements in the 4G system recommended by him would enable the errors, caused mainly by noise, fading and fast movement of mobile phone users, to come down by up to a thousand times. “This,” he added, “will be made possible by increasing the bandwidth and optimising the complexity of encoders and decoders.”
The research has succeeded in finding ways to considerably reduce the power needs of mobile handsets, leading to reduction in their size.
This aspect of research would also help space scientists, who depend mainly on solar energy for running the satellites used for communication and other operations.
Applying mathematical concepts, modulation techniques and genetic algorithm to the mobile communication system, the research has used intricacies of the probability theory in the complex domain of coding. Prof. Engineer – currently head of the Electronics & Communication Department at MNIT – said his approach had been described by scientists as “innovative, yet very simple”.
As a result of a significant reduction in the time for decoding of signals, a very high speed is likely to be obtained in applications such as Voice over Internet Protocol (VoIP), video calls, transmission of movies and live telecast of events, said Prof. Salim. The new codes would support the data rate up to 1 gigabits per second envisaged for the 4G system, he added.
In his 20 research papers published in national and international journals and in scientific conferences as part of the study, Prof. Engineer dealt with various decoding methodologies for management of error performance and time factor. MNIT also received financial assistance for the research from the Union Human Resource Development Ministry.
The research was completed under the supervision of Rajasthan Technical University Vice-Chancellor Prof. R. P. Yadav. Scientists of Florida State University, Tallahassee, U.S., and Indian Institute of Technology, Delhi, evaluated the findings and praised Prof. Engineer's original contribution.
Prof. Engineer – who is also active in the civil rights movements and is national secretary of Jamaat-e-Islami Hind – had contributed to a project for developing an underwater survey robot at Sheffield Hallam University in Britain in 1995. He stayed with the research group for eight months and designed a control circuit for the robot.
The 50-year-old professor is presently working on a project to establish a state-of-the-art research laboratory as the centre of excellence in his department at MNIT. The design and research lab would be established by this year-end, he says.