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id: variable_ldpc_decoder_def
label: LDPC Decoder Definition
parameters:
- id: value
label: Ignore Me
dtype: raw
default: '"ok"'
hide: all
- id: ndim
label: Parallelism
dtype: enum
default: '0'
options: ['0', '1', '2']
- id: dim1
label: Dimension 1
dtype: int
default: '4'
hide: ${ ('none' if (int(ndim) >= 1) else 'all') }
- id: dim2
label: Dimension 2
dtype: int
default: '4'
hide: ${ ('none' if (int(ndim) >= 2) else 'all') }
- id: file
label: AList File
dtype: file_open
- id: sigma
label: Sigma
dtype: float
default: '0.5'
- id: max_iter
label: Max Iterations
dtype: int
default: '50'
value: ${ value }
templates:
imports: from gnuradio import fec
var_make: "\n% if int(ndim)==0 #:\nself.${id} = ${id} = fec.ldpc_decoder.make(${file},\
\ ${sigma}, ${max_iter}); \n% elif int(ndim)==1 #:\nself.${id} = ${id} = map(\
\ (lambda a: fec.ldpc_decoder.make(${file}, ${sigma}, ${max_iter})), range(0,${dim1})\
\ ); \n% else:\nself.${id} = ${id} = map( (lambda b: map( ( lambda a: fec.ldpc_decoder.make(${file},\
\ ${sigma}, ${max_iter})), range(0,${dim2}) ) ), range(0,${dim1})); \n% endif"
documentation: |-
This is a soft-decision decoder that uses belief propagation (also known as message passing) that is described at:
www.cs.toronto.edu/~radford/ftp/LDPC-2012-02-11/decoding.html
Designed for a memoryless AWGN channel, it assumes a noise variance of the value specified for sigma.
file_format: 1
|
