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Letters to the Editor

Rectangular-Wave Modulation and Pulse-Length Modulation

Pages 83-84 | Received 10 Aug 1981, Published online: 10 Jul 2015
 

Abstract

Rectangular-wave modulated pulse lengths are expressed as a function of modulation index. The theoretical expressions are experimentally verified. A pulse-length modulation (PLM) system is obtained from rectangular-ware modulation (RWM). Signal-to-noise ratio expression of the rectangular-ware modulation yields the same result as Jelonek's formula for pulse-length modulation. Distortion is considered in RWM and PLM systems. Rectangular-ware modulation is compared with frequency modulation. It is concluded that rectangular-ware modulation is the same as closed-loop double-edge pulse-length modulation.

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