환경 및 클러터

레이다 전파, 육상 클러터와 해상 클러터, 대기 모델, 가스, 안개, 비 및 눈으로 인한 감쇠

ITU 대기 모델이 포함된 경우와 포함되지 않은 경우의 평탄 지구 모델과 곡면 지구 모델. 렌즈 효과 손실. 레이다 전파 인자. 해상 상태 및 유전율을 사용한 해수면 특성. 식생 유형 및 유전율을 사용한 지표면 특성. 편파, 지표각, 속도에 따른 해상 클러터와 육상 클러터. 비로 인한 ITU 감쇠 모델과 Crane 감쇠 모델. 구름과 안개로 인한 ITU 감쇠 모델. Gunn-East 눈 모델.

함수

모두 확장

대기

`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 이후)
`tropopl`	Slant-path loss due to atmosphere gaseous absorption

클러터

`billingsleyicm`	Billingsley’s intrinsic clutter motion (ICM) model
`bistaticSurfaceReflectivityLand`	Normalized bistatic reflectivity of land surface (R2026a 이후)
`clutterSurfaceRCS`	Surface clutter radar cross section
`clutterSurfaceRangeDopplerRCS`	Surface RCS as a function of range and Doppler (R2022b 이후)
`clutterGenerator`	Add clutter generator for radar (R2022a 이후)
`customSurface`	Add custom surface with complex scattering to a radar scenario (R2024a 이후)
`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 이후)
`seareflectivity`	Normalized sea surface reflectivity
`searoughness`	Surface height standard deviation for sea
`seaSpectrum`	Sea surface omnidirectional motion spectrum model (R2022a 이후)
`seaSurface`	Add sea surface to radar scenario (R2022a 이후)
`surfacegamma`	Gamma value for different terrains
`surfaceReflectivity`	Normalized reflectivity of surface (R2022a 이후)
`surfaceReflectivityLand`	Normalized reflectivity of land surface (R2022a 이후)
`surfaceReflectivityCustom`	Normalized reflectivity of custom surface (R2022a 이후)
`surfaceReflectivitySea`	Normalized reflectivity of sea surface (R2022a 이후)
`tirempl`	Path loss using Terrain Integrated Rough Earth Model (TIREM)
`clutterVolumeRCS`	Radar cross-section of volume clutter
`surfclutterrcs`	Surface clutter radar cross section (RCS)

객체 및 객체 함수

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

날씨

`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 이후)

시나리오 지오메트리

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

도움말 항목

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.

추천 예제

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 이후
라이브 스크립트 열기

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 이후
스크립트 열기

Maritime Radar Sea Clutter Modeling

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

라이브 스크립트 열기

$Modeling Target Position Errors Due to Refraction$

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 이후
라이브 스크립트 열기

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.

라이브 스크립트 열기

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.

R2021b 이후
라이브 스크립트 열기

Radar Vertical Coverage over Terrain

Define an L-band radar system in the presence of heavy clutter and visualize its 3-dimensional vertical coverage over terrain.

R2021b 이후
라이브 스크립트 열기