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lesson21_LFSR_investigation.grc
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options:
parameters:
author: jason
catch_exceptions: 'True'
category: '[GRC Hier Blocks]'
cmake_opt: ''
comment: ''
copyright: ''
description: ''
gen_cmake: 'On'
gen_linking: dynamic
generate_options: qt_gui
hier_block_src_path: '.:'
id: lesson28_LFSR_investigation
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output_language: python
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title: lesson28_LFSR_investigation
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state: true
- name: blocks_multiply_const_vxx_0_0
id: blocks_multiply_const_vxx
parameters:
affinity: ''
alias: ''
comment: ''
const: '[1/vector_size]*vector_size'
maxoutbuf: '0'
minoutbuf: '0'
type: complex
vlen: vector_size
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [1416, 2076.0]
rotation: 0
state: true
- name: blocks_stream_to_vector_0_0_0_0
id: blocks_stream_to_vector
parameters:
affinity: ''
alias: ''
comment: ''
maxoutbuf: '0'
minoutbuf: '0'
num_items: vector_size
type: complex
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [544, 2048.0]
rotation: 0
state: true
- name: blocks_stream_to_vector_0_0_1
id: blocks_stream_to_vector
parameters:
affinity: ''
alias: ''
comment: ''
maxoutbuf: '0'
minoutbuf: '0'
num_items: vector_size
type: complex
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [536, 2184.0]
rotation: 0
state: true
- name: blocks_throttle_0
id: blocks_throttle
parameters:
affinity: ''
alias: ''
comment: ''
ignoretag: 'True'
maxoutbuf: '0'
minoutbuf: '0'
samples_per_second: samp_rate
type: float
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [736, 916.0]
rotation: 0
state: true
- name: blocks_throttle_0_0
id: blocks_throttle
parameters:
affinity: ''
alias: ''
comment: ''
ignoretag: 'True'
maxoutbuf: '0'
minoutbuf: '0'
samples_per_second: samp_rate
type: float
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [736, 372.0]
rotation: 0
state: true
- name: blocks_throttle_0_0_0
id: blocks_throttle
parameters:
affinity: ''
alias: ''
comment: ''
ignoretag: 'True'
maxoutbuf: '0'
minoutbuf: '0'
samples_per_second: samp_rate
type: float
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [736, 1404.0]
rotation: 0
state: enabled
- name: blocks_throttle_0_0_0_0
id: blocks_throttle
parameters:
affinity: ''
alias: ''
comment: ''
ignoretag: 'True'
maxoutbuf: '0'
minoutbuf: '0'
samples_per_second: samp_rate
type: float
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [728, 1836.0]
rotation: 0
state: true
- name: blocks_vector_to_stream_0_0
id: blocks_vector_to_stream
parameters:
affinity: ''
alias: ''
comment: ''
maxoutbuf: '0'
minoutbuf: '0'
num_items: vector_size
type: complex
vlen: '1'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [1592, 2160.0]
rotation: 0
state: true
- name: digital_glfsr_source_x_0
id: digital_glfsr_source_x
parameters:
affinity: ''
alias: ''
comment: "Default for 10 is a shifted\nversion G1 LFSR: LFSR: x^10+x^3+1\nLooks\
\ like you need to subtract 1 from each power in the mask\nThis becomes 2**(10-1)\
\ + 2**(3-1).\nOr you could do it normally and then shift right by 1.\nThe difference\
\ between GLFSR and Scrambler LFSR \nis a shift, but the amount of shift depends\
\ on the polynomial.\nAlso, this outputs a float +1 and -1 and needs to be turned\
\ into 0s and 1s"
degree: '10'
mask: 2**(10-1) + 2**(3-1)
maxoutbuf: '0'
minoutbuf: '0'
repeat: 'True'
seed: 2**10-1
type: float
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [80, 684.0]
rotation: 0
state: true
- name: digital_glfsr_source_x_0_0
id: digital_glfsr_source_x
parameters:
affinity: ''
alias: ''
comment: "GLFSR feedback polynomial: x^3+x^2+1\nLooks like you need to subtract\
\ 1 from each power in the mask\nThis becomes 2**(3-1) + 2**(2-1).\nOr you could\
\ do it normally and then shift right by 1.\nThe difference between GLFSR and\
\ Scrambler LFSR \nis a shift, but the amount of shift depends on the polynomial.\n\
Also, this outputs a float +1 and -1 and needs to be turned into 0s and 1s"
degree: '3'
mask: 2**(3-1) + 2**(2-1)
maxoutbuf: '0'
minoutbuf: '0'
repeat: 'True'
seed: 2**3-1
type: float
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [80, 140.0]
rotation: 0
state: true
- name: digital_glfsr_source_x_0_0_0
id: digital_glfsr_source_x
parameters:
affinity: ''
alias: ''
comment: "GLFSR feedback polynomial: x^16+x^15+x^13+x^4+1\nLooks like you need\
\ to subtract 1 from each power in the mask\nThis becomes 2**(3-1) + 2**(2-1).\n\
Or you could do it normally and then shift right by 1.\nThe difference between\
\ GLFSR and Scrambler LFSR \nis a shift, but the amount of shift depends on\
\ the polynomial.\nAlso, this outputs a float +1 and -1 and needs to be turned\
\ into 0s and 1s"
degree: '16'
mask: 2**(16-1) + 2**(15-1) + 2**(13-1) + 2**(4-1)
maxoutbuf: '0'
minoutbuf: '0'
repeat: 'True'
seed: 2**16-1
type: float
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [80, 1172.0]
rotation: 0
state: enabled
- name: digital_glfsr_source_x_0_0_0_0
id: digital_glfsr_source_x
parameters:
affinity: ''
alias: ''
comment: "GLFSR feedback polynomial: x^16+x^14+x^13+x^11+1\nLooks like you need\
\ to subtract 1 from each power in the mask\nThis becomes 2**(3-1) + 2**(2-1).\n\
Or you could do it normally and then shift right by 1.\nThe difference between\
\ GLFSR and Scrambler LFSR \nis a shift, but the amount of shift depends on\
\ the polynomial.\nAlso, this outputs a float +1 and -1 and needs to be turned\
\ into 0s and 1s"
degree: '16'
mask: 2**(16-1) + 2**(14-1) + 2**(13-1) + 2**(11-1)
maxoutbuf: '0'
minoutbuf: '0'
repeat: 'True'
seed: 2**16-1
type: float
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [72, 1604.0]
rotation: 0
state: true
- name: digital_map_bb_0_0
id: digital_map_bb
parameters:
affinity: ''
alias: ''
comment: ''
map: '[-1,1]'
maxoutbuf: '0'
minoutbuf: '0'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [72, 2020.0]
rotation: 0
state: true
- name: digital_map_bb_0_0_0
id: digital_map_bb
parameters:
affinity: ''
alias: ''
comment: ''
map: '[-1,1]'
maxoutbuf: '0'
minoutbuf: '0'
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [64, 2164.0]
rotation: 0
state: true
- name: digital_scrambler_bb_1_0
id: digital_scrambler_bb
parameters:
affinity: ''
alias: ''
comment: "G1 LFSR: x^10+x^3+1\nFor the scrambler,\nlength really means length-1\n\
GPS documentation's definition \nof the bits is the opposite order"
len: 10-1
mask: 2**(10-10) + 2**(10-3)
maxoutbuf: '0'
minoutbuf: '0'
seed: 2**10-1
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [264, 908.0]
rotation: 0
state: enabled
- name: digital_scrambler_bb_1_0_0
id: digital_scrambler_bb
parameters:
affinity: ''
alias: ''
comment: 'LFSR feedback polynomial: x^3+x^2+1
For the scrambler,
length really means length-1'
len: 3-1
mask: 2**(3-3) + 2**(3-2)
maxoutbuf: '0'
minoutbuf: '0'
seed: 2**3-1
states:
bus_sink: false
bus_source: false
bus_structure: null
coordinate: [264, 372.0]
rotation: 0
state: enabled
- name: digital_scrambler_bb_1_0_0_0
id: digital_scrambler_bb
parameters:
affinity: ''
alias: ''
comment: 'LFSR feedback polynomial: x^16+x^15+x^13+x^4+1
For the scrambler,
length really means length-1'
len: 16-1
mask: 2**(16-16) + 2**(16-15) + 2**(16-13) + 2**(16-4)
maxoutbuf: '0'
minoutbuf: '0'