パルス波形

振幅、位相、および周波数変調したパルス波形

Phased Array System Toolbox™ には、いくつかの狭帯域パルス波形が用意されています。ツールボックスの波形はすべて複素ベースバンド信号です。パルス波形は、レーダーアプリケーションおよびソナーアプリケーションで使用します。

オブジェクト

`phased.CustomFMWaveform`	Custom FM pulse waveform (R2023a 以降)
`phased.LinearFMWaveform`	Linear FM pulse waveform
`phased.NonlinearFMWaveform`	Nonlinear FM pulse waveform (R2023a 以降)
`phased.PhaseCodedWaveform`	Phase-coded pulse waveform
`phased.RectangularWaveform`	Rectangular pulse waveform
`phased.SteppedFMWaveform`	Stepped FM pulse waveform

`apaseq`	Pseudorandom binary maximum length sequence (R2024a 以降)
`legendreseq`	Legendre sequence with perfect periodic autocorrelation function (R2024a 以降)
`mlseq`	Pseudorandom binary maximum length sequences (R2024a 以降)
`nlfmspec2freq`	Instantaneous frequency of nonlinear frequency-modulated waveform (R2023a 以降)
`pncode`	Generate polyphase P(n,k) code (R2024a 以降)
`shapespectrum`	Generate waveform with desired frequency spectrum shape (R2024b 以降)
`sidelobelevel`	Peak and integrated side-lobe levels (R2024b 以降)
`spectrogram`	短時間フーリエ変換を使用したスペクトログラム

Custom FM Waveform	Custom FM pulse waveform (R2023a 以降)
Linear FM Waveform	Linear FM (LFM) pulse waveform
Nonlinear FM Waveform	Nonlinear FM pulse waveform (R2023a 以降)
Phase Coded Waveform	Phase-coded pulse waveform
Rectangular Waveform	Rectangular pulse waveform
Stepped FM Waveform	Stepped FM pulse waveform

Analyze performance characteristics of pulsed, frequency-modulated, and phase-coded waveforms

Rectangular Pulse Waveforms
Simplest waveform has constant amplitude over pulse duration.
線形周波数変調パルス波形
LFM パルス波形は時間-帯域積を増加させ、ターゲット検出を改善します。
Stepped FM Pulse Waveforms
Stepped frequency pulse waveforms increase time-bandwidth product and improve target detection.
Phase-Coded Waveforms
Phase-coded waveforms have good range resolution.
Waveforms with Staggered PRFs
Staggered pulse-repetition frequency waveforms remove Doppler ambiguity.

Standards and Conventions
This section introduces the concept of baseband signals and defines the local and global coordinate systems used in the toolbox.
Units of Measure and Physical Constants
Phased Array System Toolbox uses the International System of Units (SI).