Howtosignalprocessing
- What is preamble detection?
- What is a preamble in networking?
- How does a device know when a preamble ends?
What is preamble detection?
The Preamble Detector block detects the end of preambles in data packets. A preamble is a set of symbols or bits used in packet-based communications systems to indicate the start of a packet. Packets consist of preamble data and user data.
What is a preamble in networking?
A preamble is a signal used in network communications to synchronize transmission timing between two or more systems. In general, preamble is a synonym for "introduction." The role of the preamble is to define a specific series of transmission criteria that is understood to mean "someone is about to transmit data".
How does a device know when a preamble ends?
The goal is achieved by defining a known bit sequence (by the standard) in each packet's header and trailer, called Preamble and CRC respectively. By this standard everytime a network device receives the said bit sequences, it knows that a packet is begining or ending over the link.
