0 b 2 page 11 2 august 2011 ccsds recommended

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Unformatted text preview: e Managed Parameter Allowed Values Error Correction Capability (E, symbols) 8, 16 Interleaving Depth (I) 1, 2, 3, 4, 5, 8 Virtual Fill Length (Q, symbols) Integer CCSDS 131.0-B-2 Page 11-2 August 2011 CCSDS RECOMMENDED STANDARD FOR TM SYNCHRONIZATION AND CHANNEL CODING 11.6 MANAGED PARAMETERS FOR TURBO CODE The managed parameters for Turbo code shall be those specified in table 11-4. Table 11-4: Managed Parameters for Turbo Code Managed Parameter Allowed Values Nominal Code Rate (r) 1/2, 1/3, 1/4, 1/6 Information Block Length (k, bits) 1784, 3568, 7136, 8920 11.7 MANAGED PARAMETERS FOR LOW-DENSITY PARITY-CHECK CODE The managed parameters for LDPC code shall be those specified in table 11-5. Table 11-5: Managed Parameters for Low-Density Parity-Check Code Managed Parameter Allowed Values Code Rate (r) 1/2, 2/3, 4/5, 7/8 Information Block Length (k, bits) 7136 (if r=7/8) 1024, 4096, 16384 (if r=1/2, 2/3, or 4/5) 11.8 MANAGED PARAMETERS FOR FRAME SYNCHRONIZATION The managed parameters for frame synchronization shall be those specified in table 11-6. Table 11-6: Managed Parameters for Frame Synchronization Managed Parameter Allowed Values Transfer Frame Length (bits) Integer ASM Length (bits) 32, 64, 96, 128, 192 NOTE – The ASM length is determined by the selected coding schemes. CCSDS 131.0-B-2 Page 11-3 August 2011 CCSDS RECOMMENDED STANDARD FOR TM SYNCHRONIZATION AND CHANNEL CODING ANNEX A SERVICE (NORMATIVE) A1 A1.1 OVERVIEW BACKGROUND This annex provides service definition in the form of primitives, which present an abstract model of the logical exchange of data and control information between the service provider and the service user. The definitions of primitives are independent of specific implementation approaches. The parameters of the primitives are specified in an abstract sense and specify the information to be made available to the user of the primitives. The way in which a specific implementation makes this information available is not constrained by thi...
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