In this type of unipolar signaling, a High in data, though represented by a Mark pulse, its duration T 0 is less than the symbol bit duration. Loss of synchronization is likely to occur (especially for long strings of 1s and 0s). Presence of low frequency components may cause the signal droop. The following figure clearly depicts this. In this type of unipolar signaling, a High in data is represented by a positive pulse called as Mark, which has a duration T 0 equal to the symbol bit duration. There are two variations in Unipolar signaling − The presence of pulse represents a 1 and the absence of pulse represents a 0. Unipolar signaling is also called as On-Off Keying or simply OOK. Long strings of 1s and 0s is avoided to maintain transparency. ![]() ![]() The probability of error is much reduced.Įrror detection is done and the bipolar too has a correction capability. ![]() Properties of Line Codingįollowing are the properties of line coding −Īs the coding is done to make more bits transmit on a single signal, the bandwidth used is much reduced.įor a given bandwidth, the power is efficiently used. This process of coding is chosen so as to avoid overlap and distortion of signal such as inter-symbol interference. A line code is the code used for data transmission of a digital signal over a transmission line.
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