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Encoder (131.0-B-5) ​

Group: CCSDS > Telemetry (TM)

CCSDS 131.0-B-5 TM synchronization and channel coding encoder

Parameters ​

General ​

Coding Method ​

  • Description: Which coding method to use
  • Automation reference: Coding
  • Type: enumeration
IdentifierValueDescription
UncodedUncoded
ConvolutionalConvolutional
ReedSolomonReed-Solomon
ConcatenatedConcatenated Code
TurboTurbo
LDPC_TMFramesLDPC (TM Frames)LDPC coding (of a Transfer Frame)
LDPC_SMTFLDPC (SMTF stream)LDPC coding (of a stream of SMTFs)

Randomization ​

  • Description: Which randomizer is used
  • Automation reference: Randomization
  • Type: enumeration
IdentifierValueDescription
AbsentAbsent
ShortShort
LongLong (B-5)Long randomizer added in CCSDS 131.0-B-5

Transfer Frame Length ​

  • Description: Number of bytes per transfer frame
  • Automation reference: TransferFrameLength
  • Enablement: Coding in [Uncoded, Convolutional, LDPC_SMTF]
  • Type: integer

Convolutional Code ​

Code Rate ​

  • Description: Code rate (r)
  • Automation reference: ConvolutionalRate
  • Enablement: Coding in [Concatenated, Convolutional]
  • Type: enumeration
IdentifierValueDescription
Rate121/2

Reed-Solomon ​

Error Correction Capability ​

  • Description: Numbers of errors that can be corrected (E)
  • Automation reference: ErrorCorrectionCapability
  • Enablement: Coding in [Concatenated, ReedSolomon]
  • Type: enumeration
IdentifierValueDescription
E88
E1616

Interleaving Depth ​

  • Description: Numbers of RS codewords interleaved to form a CADU (I)
  • Automation reference: InterleavingDepth
  • Range: [1; 8]
  • Enablement: Coding in [Concatenated, ReedSolomon]
  • Type: integer

Virtual Fill Length ​

  • Description: Virtual zeros prepended for each RS codeword (Q)
  • Automation reference: VirtualFill
  • Range: [0; 238]
  • Enablement: Coding in [Concatenated, ReedSolomon]
  • Type: integer

Turbo Code ​

Nominal Code Rate ​

  • Description: Nominal Code rate (r)
  • Automation reference: TurboRate
  • Enablement: Coding == Turbo
  • Type: enumeration
IdentifierValueDescription
Rate121/2
Rate131/3
Rate141/4
Rate161/6

Information Block Length ​

  • Description: Information Block Length (k, bits)
  • Automation reference: TurboBlockLength
  • Enablement: Coding == Turbo
  • Type: enumeration
IdentifierValueDescription
K17841784
K35683568
K71367136
K89208920

LDPC ​

Code Rate ​

  • Description: Code Rate (r)
  • Automation reference: LDPCCodeRate
  • Enablement: Coding in [LDPC_TMFrames, LDPC_SMTF]
  • Type: enumeration
IdentifierValueDescription
R787/8

LDPC Codeblock Size ​

  • Description: Number of Codewords per output frame (m)
  • Automation reference: LDPCCodeblockSize
  • Range: [1; 8]
  • Enablement: Coding == LDPC_SMTF
  • Type: integer