beamform_doa — RANGEDOPPLER `beamform` op

• データ種: beatcube → table

• 呼び出し: import fullseye as fs; fs.ledger.beamform_doa(cube, wavelength_m=0.0038934, element_spacing_m=None, angles_deg=None, range_bin=None, doppler_bin=None, n_targets=1, min_fraction=0.1, range_bin_m=None, velocity_bin_ms=None) (実装を直接呼ぶなら import rangedoppler; rangedoppler.beamform_doa(cube, wavelength_m=0.0038934, element_spacing_m=None, angles_deg=None, range_bin=None, doppler_bin=None, n_targets=1, min_fraction=0.1, range_bin_m=None, velocity_bin_ms=None)、台帳から引くなら opsrangedoppler.get("beamform_doa"))

使い方

Direction(s) of arrival for one range-Doppler cell, in degrees.

beamform_delay_sum followed by strict local-maximum picking on the angle spectrum: the peaks are sorted by power, filtered at *min_fraction* of the strongest, and the top *n_targets* returned. Two targets closer than the array's beamwidth (~0.886*lambda/(N_a*d), reported here as angular_resolution_deg) merge into one lobe — delay-and-sum cannot separate them, and this reports one peak rather than pretending otherwise.

When *range_bin_m* / *velocity_bin_ms* are supplied (from fmcw_design) the cell's range and velocity are converted too, giving the complete (range, velocity, angle) detection this family exists to produce; without them those two fields are None rather than a number in unknown units.

Returns a dict: angles_deg and powers (lists, strongest first), n_found, grid_deg and spectrum (the full sweep), range_bin / doppler_bin (the cell used), range_m / velocity_ms, angular_resolution_deg and max_unambiguous_angle_deg.

Raises ValueError: everything beamform_delay_sum raises, plus *n_targets* < 1 or a *min_fraction* outside [0, 1].

詳しい使い方ガイド

• fmcw_range_doppler ファミリガイド

参考(サンプルデータ・文献)

• サンプルデータカタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。

• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。

• アルゴリズムの正典(著者・年)と用途は上記ファミリ使い方ガイドに記載。

実行できる例(この op を実際に呼ぶ検証済みサンプル)

• fmcw_range_doppler — py -3.11 examples/fmcw_range_doppler.py

• poc_multibeam_bathymetry — py -3.11 examples/poc_multibeam_bathymetry.py

型が繋がる次の op(`table` を入力に取れる)

—

同カテゴリ(`beamform`)

beamform_delay_sum

*Provenance: rangedoppler.py — RANGEDOPPLER operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。*

beamform_doa — RANGEDOPPLER beamform op

使い方