diffcod - SIGNAL PROCESSING & SIMULATION NEWSLETTER...

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TUTORIAL 2 - Differential Encoding One of the common difficulties in communications engineering is that often the same terms are used to represent different ideas. Differential Encoding is one such term. We will describe here two common ways this term is used and unless you know these differences, they can lead to confusion. Differential Encoding – Is used to provide polarity reversal protection Bit streams going through the many communications circuits in the channel can be un-intentionally inverted. Most signal processing circuits can not tell if the whole stream is inverted. This is also called phase ambiguity. Differential Encoding is used to protect against this possibility. It is one of the simplest form of error protection coding done on a baseband sequence prior to modulation. A Differential Coding system consists of a modulo 2 adder operation as shown below. d
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diffcod - SIGNAL PROCESSING & SIMULATION NEWSLETTER...

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