環境とクラッター

レーダー伝播、陸と海のクラッター、大気モデル、ガス、霧、雨や雪による減衰

ITU 大気モデルを適用する場合としない場合の、平面および曲面の地球モデル。レンズ効果の損失。レーダー伝播係数。海面状態と誘電率による海面特性評価。植生タイプと誘電率による地表面特性評価。偏波、グレージング角、および速度に依存する海と陸のクラッター。降雨による ITU および Crane 減衰モデル。雲と霧による ITU 減衰モデル。Gunn-East の雪モデル。

関数

すべて展開する

大気

`atmositu`	Use ITU reference atmospheres
`fspl`	Free space path loss
`gaspl`	RF signal attenuation due to atmosphere gaseous absorption
`lenspl`	Calculate loss due to tropospheric lens effect
`radarpropfactor`	One-way radar propagation factor
`refractiveidx`	Calculates the refractive index
`refractionexp`	CRPL exponential reference atmosphere refraction exponent (R2021b 以降)
`tropopl`	Slant-path loss due to atmosphere gaseous absorption

クラッター

`billingsleyicm`	Billingsley’s intrinsic clutter motion (ICM) model
`clutterSurfaceRCS`	Surface clutter radar cross section
`clutterSurfaceRangeDopplerRCS`	Surface RCS as a function of range and Doppler (R2022b 以降)
`clutterGenerator`	Add clutter generator for radar (R2022a 以降)
`customSurface`	Add custom surface with complex scattering to a radar scenario (R2024a 以降)
`earthSurfacePermittivity`	Permittivity and conductivity of earth surface materials
`landreflectivity`	Reflectivity of land surface
`landroughness`	Surface height standard deviation for land
`landSurface`	Add land surface to radar scenario (R2022a 以降)
`seareflectivity`	Normalized sea surface reflectivity
`searoughness`	Surface height standard deviation for sea
`seaSpectrum`	Sea surface omnidirectional motion spectrum model (R2022a 以降)
`seaSurface`	Add sea surface to radar scenario (R2022a 以降)
`surfacegamma`	Gamma value for different terrains
`surfaceReflectivity`	Normalized reflectivity of surface (R2022a 以降)
`surfaceReflectivityLand`	Normalized reflectivity of land surface (R2022a 以降)
`surfaceReflectivityCustom`	Normalized reflectivity of custom surface (R2022a 以降)
`surfaceReflectivitySea`	Normalized reflectivity of sea surface (R2022a 以降)
`tirempl`	Path loss using Terrain Integrated Rough Earth Model (TIREM)
`clutterVolumeRCS`	Radar cross-section of volume clutter
`surfclutterrcs`	Surface clutter radar cross section (RCS)

オブジェクトとオブジェクト関数

`updateScatteringMatrix`	Update scattering matrices (R2024a 以降)
`ClutterGenerator`	Clutter generator object (R2022a 以降)
`CustomSurface`	Custom surface with complex scattering belonging to a radar scenario (R2024a 以降)
`getClutterGenerator`	Obtain clutter generator belonging to a radar (R2022a 以降)
`ringClutterRegion`	Ring clutter region (R2022a 以降)
`findClutterSampleIndices`	Clutter sample indices (R2023b 以降)
`height`	Height of point on surface (R2022a 以降)
`occlusion`	Test for occlusion of point by a surface (R2022a 以降)
`plotReflectivityMap`	Plots reflectivity map (R2024a 以降)
`LandSurface`	Land surface belonging to radar scenario (R2022a 以降)
`SeaSurface`	Sea surface belonging to radar scenario (R2022a 以降)
`SurfaceReflectionCoefficient`	Reflection coefficient model for land and sea surfaces (R2024a 以降)
`reflectionCoefficient`	Returns the reflection coefficient (R2024a 以降)

気象

`cranerainpl`	RF signal attenuation due to rainfall using Crane model
`fogpl`	RF signal attenuation due to fog and clouds
`rainpl`	RF signal attenuation due to rainfall using ITU model
`snowpl`	Path loss due to wet snow
`weatherTimeSeries`	Simulate I/Q signals for weather returns using a Monte Carlo approach (R2024a 以降)

シナリオジオメトリ

`bistaticFreeSpacePath`	Bistatic free space propagation path (R2025a 以降)
`depressionang`	Depression angle of surface target
`effearthradius`	Effective earth radius
`freespacePath`	Monostatic free space propagation path (R2025a 以降)
`grazingang`	Grazing angle of surface target
`horizonrange`	Horizon range
`llarangeangle`	Propagation range between two geolocations (R2022b 以降)
`el2height`	Convert target elevation angle to height
`height2el`	Convert target height to elevation angle
`height2range`	Convert target height to propagated range (R2021b 以降)
`height2grndrange`	Convert target height to ground range (R2021b 以降)
`range2height`	Convert propagated range to target height (R2021b 以降)
`slant2range`	Convert slant range to propagated range (R2022b 以降)

トピック

Two-Ray Multipath Propagation
A two-ray propagation channel is the next step up in complexity from a free-space channel and is the simplest case of a multipath propagation environment.

注目の例

Predict Surface Clutter Power in Range-Doppler Space

Calculate the radar cross section (RCS) of surface clutter seen by a pulse-Doppler radar system.

R2022b 以降
ライブスクリプトを開く

Modeling the Propagation of Radar Signals

Model RF propagation effects such as free space path loss, atmospheric attenuation due to rain, fog and gas, and multipath propagation due to bounces on the ground.

R2021b 以降
スクリプトを開く

Maritime Radar Sea Clutter Modeling

Simulate sea clutter for a maritime surveillance radar system and calculate the clutter-to-noise ratio (CNR).

ライブスクリプトを開く

$Modeling Target Position Errors Due to Refraction$

Modeling Target Position Errors Due to Refraction

Explore some environmental factors that are beyond a radar system designer's control and can result in losses and estimation errors.

R2021b 以降
ライブスクリプトを開く

Planning Radar Network Coverage over Terrain

Plan a radar network using propagation modeling over terrain and use the radar equation to determine whether target locations can be detected.

ライブスクリプトを開く

Radar Performance Analysis over Terrain

Analyze the performance of a ground-based radar tasked with detecting an aircraft in the presence of heavy, mountainous clutter to show how radar detection performance improves as target elevation increases above the terrain.