Signal Processing Methods

In this package, we present signal processing related methods for the Autoware applications. The following functionalities are available in the current version.

• an 1-D Low-pass filter,
• Butterworth low-pass filter tools.

low-pass filter currently supports only the 1-D low pass filtering.

Assumptions / Known limits

TBD.

Changelog for package autoware_signal_processing

1.1.0 (2025-05-01)

1.9.0 (2026-06-24)

• Merge remote-tracking branch 'origin/main' into tmp/bot/bump_version_base

• test(autoware_signal_processing): cover Butterworth bilinear path and guard printContinuousTimeTF (#1146)

  * test(autoware_signal_processing): cover Butterworth bilinear path and lowpass gain Strengthen test coverage without changing any public signatures or source:

  - Add ground-truth tests for the default (non-sampling) bilinear discrete-TF path (order 1 and 2), which previously had only a single weak end-to-end check via the order-5 Buttord case. Values cross-checked against scipy.signal.bilinear.

  - Pin the setCutOffFrequency(fc, fs) fc >= fs/2 invalid-argument guard, which had no test, by asserting filter_specs_ is left unchanged.

  - Assert poly()/getAnBn() consistency through a known 2nd-order case and add a LowpassFilter1d::setGain test. Refs: autowarefoundation/autoware_core#1096

  • test(autoware_signal_processing): address review feedback

  - Correct printFilterContinuousTimeRoots() doc comment to describe the continuous-time roots it actually prints, not the order/cutoff.

  - Guard printContinuousTimeTF() against indexing the denominator past its end when called before computeContinuousTimeTF(), and cover it with a regression test.

  - Add inline cspell:ignore for the math term "monic". Refs: autowarefoundation/autoware_core#1096 ---------

• Contributors: Yutaka Kondo, github-actions

1.8.0 (2026-05-01)

1.7.0 (2026-02-14)

1.6.0 (2025-12-30)

1.5.0 (2025-11-16)

• Merge remote-tracking branch 'origin/main' into humble

• feat: replace [ament_auto_package]{.title-ref} to [autoware_ament_auto_package]{.title-ref} (#700)

  • replace ament_auto_package to autoware_ament_auto_package

  * style(pre-commit): autofix ---------Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

• chore: bump version (1.4.0) and update changelog (#608)

• Contributors: Mete Fatih Cırıt, Yutaka Kondo, mitsudome-r

1.4.0 (2025-08-11)

• chore: bump version to 1.3.0 (#554)
• Contributors: Ryohsuke Mitsudome

1.3.0 (2025-06-23)

• fix: to be consistent version in all package.xml(s)
• chore: bump up version to 1.1.0 (#462) (#464)
• Contributors: Yutaka Kondo, github-actions

1.0.0 (2025-03-31)

• chore: update version in package.xml
• feat(autoware_signal_processing): port autoware_signal_processing from Autoware Universe (#303)
• Contributors: Ryohsuke Mitsudome