Overview Pulse Code Modulation (PCM) is a method used to digitally represent analog signals. It involves sampling the analog signal at regular intervals, quantizing each sample into a digital value, ...

Pulse modulation may be subdivided in to two types analog and digital. In analog the indication of sample amplitude is the nearest variable. In digital the information is a code. The pulse position ...

The various methods for converting analogue signals into the form of pulse-code modulation and back again are reviewed. Reasons are given for preferring a particular method of conversion called ...

In order to satisfy the source demand of long-distance scattering optical communication system, pulse width modulation scheme is proposed, which aim at the characteristics of high power laser. A ...