Posts Tagged ‘symbol stream
The purpose of the Synchronization and Channel Coding Sublayer and the associated Physical Layer Operations Procedures at the sending end is to:
- encode the data units received from the sublayer above to provide a forward error detection and correction capability, which gives a high degree of protection against errors or corruptions that occur during transmission through the space link;
- encapsulate the data units so that the start and end can be detected by the receiving end;
- enable the receiving end to resolve the data ambiguity (sense of ‘1’ and ‘0’) in the received symbol stream;
- control the transmission of an acquisition bit pattern, which enables the receiver to acquire bit synchronization;
- ensure there are sufficient bit transitions in the transmitted bit stream so that the receiver can maintain bit synchronization during the reception of a data unit;
- control the optional transmission of an idle bit pattern, which enables the receiver to maintain bit synchronization between data units.
The purpose of the Synchronization and Channel Coding Sublayer at the receiving end is to:
- detect the start and end of each data unit in the received symbol stream;
- resolve, if necessary, the data ambiguity (sense of ‘1’ and ‘0’) in the received symbol stream;
- decode each data unit and optionally correct the errors detected.