Manchester Code
In telecommunication and data storage, Manchester coding (also known as Phase Encoding, or PE) is a line code in which the encoding of each data bit has at least one transition and occupies the same time. It therefore has no DC component, and is self-clocking, which means that it may be inductively or capacitively coupled, and that a clock signal can be recovered from the encoded data.
The name comes from its development at the University of Manchester, where the coding was used to store data on the magnetic drum of the Manchester Mark 1 computer.
Manchester coding is widely used (e.g., in Ethernet; see also RFID or Near Field Communication). There are more complex codes, such as 8B/10B encoding, that use less bandwidth to achieve the same data rate but may be less tolerant of frequency errors and jitter in the transmitter and receiver reference clocks.
Read more about Manchester Code: Features, Description
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