Channel coding¶

Convolutional, Reed-Solomon and interleaving codes.

Python module doppler.coding. Area: Coding.

Classes and functions¶

Name	Kind	API	Gallery	Example	Design
`ConvEncoder`	class	ConvEncoder	Name Your Own Code — and What Happens Past the Radius	coding_demo
`Deinterleaver`	class	Deinterleaver		interleave_burst_demo	Interleaving — spreading a burst across codewords
`Interleaver`	class	Interleaver		interleave_burst_demo	Interleaving — spreading a burst across codewords
`ReedSolomon`	class	ReedSolomon	Name Your Own Code — and What Happens Past the Radius DsssBurstReceiver — the Composed Burst Chain	coding_demo interleave_burst_demo
`Viterbi`	class	Viterbi	Name Your Own Code — and What Happens Past the Radius A CCSDS CADU, as a Frame Description DsssBurstReceiver — the Composed Burst Chain	coding_demo	Reed-Solomon The FEC Receive Half The Viterbi Decoder

Gallery pages in this domain¶

Name Your Own Code — and What Happens Past the Radius — a Reed-Solomon outer code and a convolutional inner code that are nobody's standard, run end to end; and what a bounded-distance decoder does past its radius, where a refusal is safe and a miscorrection is not

Design pages in this domain¶

Interleaving — spreading a burst across codewords — the permutation, the three ways to reason about it wrongly, and the measured gain: E to E×depth, and the bound that still bites
Reed-Solomon — the outer code as a description: the two offsets a textbook omits (j0 != 1, and a root stride that is not 1), why Chien iterates positions rather than field elements, and what a refusal is not
The FEC Receive Half — the Viterbi, the node sync it needs first, and the lock detector's two error probabilities: why the code's transparency means polarity cannot be resolved by the decoder
The Viterbi Decoder — the CCSDS inner code decoded: the trellis in the encoder's own terms, the branch metric it inherits, and why 5·K traceback is 17 % above the floor

Used in other domains¶

Pages filed under another domain that name a symbol of this module, or link to or from a page filed here: a class used for another task is found from both sides, never re-filed.