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Unformatted text preview: ch tend to be static for
long periods of time, and whose change generally signifies a major reconfiguration of the
synchronization and channel coding systems associated with a particular mission. Through
the use of a management system, management conveys the required information to the
synchronization and channel coding systems.
In this section, the managed parameters used by synchronization and channel coding systems
are listed. These parameters are defined in an abstract sense and are not intended to imply
any particular implementation of a management system.
11.2.1 All the managed parameters specified in this section shall be fixed for all Transfer
Frames on a Physical Channel during a given Mission Phase.
11.2.2 When the Reed-Solomon or LDPC codes are not used, the Frame Error Control Field
defined in references  or  shall be present. NOTE – The presence or absence of the Frame Error Control Field is established by the
management of the relevant Data Link Protocol. When the Reed-Solomon or
LDPC codes are used, the Frame Error Control Field can still be present but no
check is required by the decoding system.
11.2.3 If present, the Frame Error Control Field shall occur within every Transfer Frame
transmitted within the same Physical Channel throughout a Mission Phase.
11.3 MANAGED PARAMETERS FOR SELECTED OPTIONS The managed parameters for a particular Physical Channel shall be those specified in table 11-1. CCSDS 131.0-B-2 Page 11-1 August 2011 CCSDS RECOMMENDED STANDARD FOR TM SYNCHRONIZATION AND CHANNEL CODING Table 11-1: Managed Parameters for Selected Options
Managed Parameter Allowed Values Randomizer Present/Absent Coding Method None
LDPC 11.4 MANAGED PARAMETERS FOR CONVOLUTIONAL CODE The managed parameters for convolutional code shall be those specified in table 11-2.
Table 11-2: Managed Parameters for Convolutional Code
Code rate (r) Allowed Values
1/2, 2/3, 3/4, 5/6, 7/8 11.5 MANAGED PARAMETERS FOR REED-SOLOMON CODE The managed parameters for Reed-Solomon code shall be those specified in table 11-3.
Table 11-3: Managed Parameters for Reed-Solomon Cod...
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