Through the use of a management system management

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

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 GENERAL 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 [1] or [2] 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 Convolutional Reed-Solomon Concatenated Code Turbo 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 Managed Parameter 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...
View Full Document

Ask a homework question - tutors are online