Skip to content

CPM Phase Error Detector (PED) and Timing Error Detector (TED) #3

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
mcdiarmid wants to merge 16 commits into
base: main
Choose a base branch
from
Draft

CPM Phase Error Detector (PED) and Timing Error Detector (TED) #3

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
16 commits
Select commit Hold shift + click to select a range
124762f
Use waveforms module to generate pcmfm_pulse filter, fix length.
mcdiarmid Apr 14, 2025
999eaec
Set target Eb/N0, getting closer.
mcdiarmid Jul 24, 2025
43c2b37
Lint.
mcdiarmid Jul 24, 2025
ed9d50c
Add more precoders and DE
mcdiarmid Aug 6, 2025
b38062b
Split detection and Laurent decomp examples.
mcdiarmid Aug 6, 2025
5a949e0
Additional kwargs to be provided for constellation, make default cons…
mcdiarmid Aug 6, 2025
f65fdd3
Generate SOQPSK constellation via PAM decomp, use markevery.
mcdiarmid Aug 8, 2025
65eec26
Show PAM approximation via simple addition of MFs, pseudo-symbols, an…
mcdiarmid Aug 11, 2025
b4c0843
Uncomment alternative PAM superposition method, selectable from varia…
mcdiarmid Aug 13, 2025
27a6b8a
Calculate normalized mean square error for PAM approx, compare to exp…
mcdiarmid Aug 13, 2025
399c70a
Lint
mcdiarmid Aug 13, 2025
addc6b3
Add IRIG DE and Recursive DE, add SOQPSK SxS detector, add pre-detect…
mcdiarmid Aug 14, 2025
8dedf8f
Use lfilter where possible, generate forward-reverse for FIR filters,…
mcdiarmid Aug 15, 2025
4954f91
Lint.
mcdiarmid Aug 15, 2025
80fe24c
Remove some unused example code, generate some sxs constellation plots.
mcdiarmid Aug 17, 2025
a40f9e1
Lint
mcdiarmid Aug 17, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 6 additions & 8 deletions examples/pcmfm_test.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,11 +4,14 @@
import numpy as np
from matplotlib.axes import Axes
from matplotlib.ticker import MultipleLocator
from scipy.signal import besselap, impulse

from waveforms.cpm.helpers import normalize_cpm_filter
from waveforms.cpm.modulate import cpm_modulate
from waveforms.cpm.pcmfm import PCMFM_DENOM, PCMFM_NUMER
from waveforms.cpm.pcmfm import (
PCMFM_DENOM,
PCMFM_NUMER,
freq_pulse_pcmfm,
)
from waveforms.cpm.trellis.encoder import TrellisEncoder
from waveforms.cpm.trellis.model import SimpleTrellis2
from waveforms.glfsr import PNSequence
Expand Down Expand Up @@ -42,12 +45,7 @@
["-", "--", "-", "--", "-."],
[3, 3, 2, 2, 2],
):
t, y = impulse(
besselap(order, norm="mag"),
T=np.linspace(0, length * 2 / 0.7, num=(length - 1) * sps + 1),
)
freq_pulse = normalize_cpm_filter(sps, np.convolve(y, np.ones(sps)))

freq_pulse = freq_pulse_pcmfm(sps, order)
normalized_time, modulated_signal = cpm_modulate(
symbols=symbols,
mod_index=mod_index,
Expand Down
Loading
Loading