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Abstract
Man-made radio noise occupies a considerable portion of the useful radio frequency spectrum. Noise from different sources is perceptible up to the frequency range of as high as 1000 MHz- Below 20 MHz, ignition systems create the main problem. With the increasing use of various types of radio noise generating household electrical gadgets, development of very sensitive type of receivers, the problem of pollution has been aggravated. In this paper, the unsuppressed noise values for some ignition systems with the use of indigenous and imported suppressors are reported and discussed.
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Ashis Sanyal
Sanyal, Ashis: (b. 1950). Passed BSc (Hons) from Serampore college and obtained BTech & MTech degrees from Institute of Radio-physics and Electronics, Calcutta University in 1973 and 1975 respectively. Worked as Junior Executive (Trainee) in Fertilizer Corporation and later joined as Engineer in Ministry of Communications in 1976. He has worked as the in charge of Radio Noise Survey Units of Monitoring Organisation at Calcutta and Hyderabad. Presently engaged in planning and coordination of man-made radio noise survey work of three such units at Delhi, Calcutta and Hyderabad. His special interest is on noise and interference problems, signal processing and allied problems in digital communication engineering.