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Unformatted text preview: gh which user
telecommand data bits may be transferred. The data are encoded to reduce the effects of
noise in the Physical layer channel on the user data. A block code has been chosen to
provide this protection. Synchronization for the codeblock and delimiting of the beginning
of user data are provided by the Command Link Transmission Unit (CLTU) data structure.
Resolution of data ambiguity (sense of “1” and “0”) when receiving the symbol stream shall
be a service of the Coding layer. Data ambiguity may result from the modulation technique
utilized in the Physical layer such as suppressed-carrier modulation. Ambiguity resolution
techniques shall use inherent information in the symbol stream such as either the CLTU start
sequence pattern or NRZ-M modulation.
Standard procedures for randomizing, encoding, and handling fill bits are described in 3.3.
3.2 STANDARD DATA STRUCTURES WITHIN THE CODING LAYER The standard data structures within the Coding layer are the TC Codeblock and the CLTU.
3.2.1 TC CODEBLOCK FORMAT The TC Code...
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- Spring '14