전파 및 채널 모델

사이트 및 지형 시각화, 전파 모델 사양(Longley-Rice 포함), 신호 강도, 신호 커버리지 맵, 정적 및 페이딩 채널 모델

RF 경로 전파 모델링은 신호가 주변 환경을 통과할 때 나타나는 송신 지점으로부터의 전자파 복사의 동작을 기술합니다. RF 전파 경로를 모델링하고 3차원으로 시각화합니다.

채널 모델링은 통신 시스템 링크의 무선 환경을 기술합니다. 전파 분석 및 채널 모델링은 다양한 시나리오에서 어떻게 송신기에서 수신기까지 전자파의 손실이 발생하는지 이해하는 데 필수적입니다. 레일리, 라이시안 또는 WINNER II 페이딩 프로파일을 가진 잡음 있는 SISO 및 MIMO 채널을 모델링하고 시각화합니다. 대기에서의 손상 및 다중 도플러 스펙트럼 형상도 사용할 수 있습니다.

함수

모두 확장

RF 전파

맵 데이터

`addCustomBasemap`	Add custom basemap
`addCustomTerrain`	Add custom terrain data (R2019b 이후)
`removeCustomBasemap`	Remove custom basemap
`removeCustomTerrain`	Remove custom terrain data (R2019b 이후)

사이트

`show`	Show site in Site Viewer (R2019b 이후)
`hide`	Hide site from Site Viewer (R2019b 이후)
`distance`	사이트 간 거리 (R2019b 이후)
`angle`	Angle between sites (R2019b 이후)
`elevation`	Elevation of site (R2019b 이후)
`location`	Coordinates at distance and angle from site (R2019b 이후)

전파 및 시각화

`coverage`	Display or compute coverage map (R2019b 이후)
`pattern`	Display antenna radiation pattern in Site Viewer (R2019b 이후)
`sinr`	Display or compute signal-to-interference-plus-noise (SINR) ratio (R2019b 이후)
`link`	Display or compute communication link status (R2019b 이후)
`sigstrength`	Received signal strength (R2019b 이후)
`raytrace`	Display or compute RF propagation rays (R2019b 이후)
`los`	Display or compute line-of-sight (LOS) visibility status (R2019b 이후)
`propagationModel`	Create RF propagation model (R2019b 이후)
`pathloss`	Path loss of radio wave propagation (R2019b 이후)

경로 손실

`cranerainpl`	RF signal attenuation due to rainfall using Crane model (R2020a 이후)
`rainpl`	RF signal attenuation due to rainfall
`gaspl`	RF signal attenuation due to atmospheric gases
`fogpl`	RF signal attenuation due to fog and clouds
`fspl`	자유 공간 경로 손실
`raypl`	Path loss and phase change for RF propagation ray (R2020a 이후)
`buildingMaterialPermittivity`	Permittivity and conductivity of building materials (R2020a 이후)
`earthSurfacePermittivity`	Permittivity and conductivity of earth surface materials (R2020a 이후)

좌표계 변환

`rangeangle`	Range and angle calculation (R2019b 이후)
`global2localcoord`	Convert global to local coordinates (R2020a 이후)
`local2globalcoord`	Convert local to global coordinates (R2020a 이후)
`cart2sphvec`	Convert vector from Cartesian components to spherical representation (R2020a 이후)
`sph2cartvec`	Convert vector from spherical basis components to Cartesian components (R2020a 이후)

채널 모델링

채널 모델

`awgn`	신호에 백색 가우스 잡음 추가
`bsc`	Binary symmetric channel
`stdchan`	Construct channel System object from set of standardized channel models

채널 유틸리티

`channelDelay`	Channel timing delay (R2020a 이후)
`convertSNR`	Convert SNR values (R2022a 이후)
`ofdmChannelResponse`	Calculate OFDM channel response (R2023a 이후)
`doppler`	Construct Doppler spectrum structure
`winner2.AntennaArray`	Create antenna array for WINNER II channel model
`winner2.dipole`	Calculate half-wavelength dipole field pattern for WINNER II channel model
`winner2.layoutparset`	WINNER II layout parameter configuration
`winner2.wim`	Generate channel coefficients using WINNER II channel model
`winner2.wimparset`	WINNER II model parameter configuration

객체

모두 확장

RF 전파

사이트

`txsite`	Create RF transmitter site (R2019b 이후)
`rxsite`	Create RF receiver site (R2019b 이후)
`siteviewer`	Create Site Viewer (R2019b 이후)
`arrayConfig`	Create phased array configuration (R2020b 이후)

전파 모델

`FreeSpace`	Free space propagation model (R2019b 이후)
`Rain`	Rain propagation model (R2019b 이후)
`Gas`	Gas propagation model (R2019b 이후)
`Fog`	Fog propagation model (R2019b 이후)
`CloseIn`	Close-in propagation model (R2019b 이후)
`LongleyRice`	Longley-Rice propagation model (R2019b 이후)
`RayTracing`	Ray tracing propagation model (R2019b 이후)

전파 데이터

`propagationData`	Create RF propagation data from measurements (R2020a 이후)
`comm.Ray`	Create RF propagation ray (R2020a 이후)

채널 모델링

채널 모델

`comm.AWGNChannel`	Add white Gaussian noise to input signal
`comm.RayTracingChannel`	Filter signal through multipath fading channel defined by propagation rays (R2020b 이후)
`comm.RayleighChannel`	Filter input signal through multipath Rayleigh fading channel
`comm.RicianChannel`	Filter input signal through multipath Rician fading channel
`comm.MIMOChannel`	Filter input signal through MIMO multipath fading channel
`comm.WINNER2Channel`	Filter input signal through WINNER II fading channel
`comm.gpu.AWGNChannel`	Add white Gaussian noise to input signal with GPU
`uwbChannel`	Filter input signal through UWB IEEE 802.15.4 a/z/ab channel (R2024a 이후)

채널 유틸리티

comm.ChannelFilter Filter signal using multipath gains at specified path delays (R2020b 이후)

블록

모두 확장

경로 손실

Free Space Path Loss

Apply free space path loss to complex signal

채널 모델링

채널 모델

AWGN Channel	Add white Gaussian noise to input signal
Binary Symmetric Channel	Introduce binary errors
MIMO Fading Channel	Filter input signal through MIMO multipath fading channel
SISO Fading Channel	Filter input signal through SISO multipath fading channel

채널 유틸리티

OFDM Channel Response

Calculate OFDM channel response (R2023a 이후)

도움말 항목

RF 전파

Choose a Propagation Model
When to use the different propagation models based on frequency, type, and limitations.
RF Propagation and Visualization
Visualize coverage maps, SINR maps, and propagation paths in outdoor and indoor environments.
Ray Tracing for Wireless Communications
Ray tracing models predict propagation paths and corresponding losses using 3-D environment geometry and electromagnetic analysis.
Customize Buildings for Ray Tracing Analysis
Customize the buildings stored in an OpenStreetMap^® file and then perform ray tracing analysis on a scene created from the buildings. (R2023b 이후)

채널 모델링

AWGN 채널
채널 및 RF 손상 특성을 모델링합니다.
Configure Eb/No for AWGN Channels with Coding
This example shows how to set the bit energy to noise density ratio (Eb/No) for communication links employing channel coding.
Using AWGN Channel Block for Coded Signals
When your simulation uses coding, the Eb/N0 setting for the AWGN channel must be adjusted by the coding rate to apply the desired signal to noise (SNR) ratio.
Fading Channels
Defining a fading channel object and applying it to a signal.
Channel Visualization
These channel modeling System objects and blocks in Communications Toolbox™ include an option to visualize the characteristics of a fading channel.
WINNER II Channel
Model the WINNER II channel using the WINNER II Channel Model for Communications Toolbox add-on.

추천 예제

Indoor MIMO-OFDM Communication Link Using Ray Tracing

Perform ray tracing in an indoor environment and use the results to build a channel model for a link level simulation with the MIMO-OFDM technique.

라이브 스크립트 열기

Visualize Antenna Coverage Map and Communication Links

Calculate and visualize signal strength between a transmitter and multiple receivers. The visualizations include an area coverage map and colored communication links. The example also shows selection of a directional antenna in order to achieve a communication link to a specific location.

라이브 스크립트 열기

Urban Link and Coverage Analysis Using Ray Tracing

Use ray tracing to analyze communication links and coverage areas in an urban environment.

라이브 스크립트 열기

Analyze Communication Link for Aircraft over Seawater Using Ray Tracing

Use ray tracing to predict the path gain and signal strength of a radio link for an aircraft flying over seawater.

라이브 스크립트 열기

Visualize Coverage Maps over Lunar Terrain Using Ray Tracing

Create a coverage map for a base station on the surface of the Moon using terrain data and ray tracing analysis.

라이브 스크립트 열기

GSM, CDMA and WiMAX Channel Models

Simulate multipath fading channels defined for GSM, EDGE, CDMA, and WiMAX wireless standards.

스크립트 열기

Multipath Fading Channel

Use Rayleigh and Rician multipath fading channel System objects and their built-in visualization to model a fading channel and display the spectral characteristics of the channel.

라이브 스크립트 열기

Multipath Fading Channel in Simulink

Simulate multipath Rayleigh and Rician fading channels by using the SISO Fading Channel block.

스크립트 열기

HF Ionospheric Channel Models

Simulate High-Frequency (HF) ionospheric channels, based on the models described in Recommendation ITU-R F.1487.

라이브 스크립트 열기

Simultaneous Simulation of Multiple Fading Channels with WINNER II Channel Model

Set up a system with multiple base stations, multiple mobile stations, and multiple MIMO downlinks from one BS sector to one MS.

라이브 스크립트 열기

802.11ac Multiuser MIMO Precoding with WINNER II Channel Model

Transmit and receive processing for a IEEE^® 802.11ac™ multiuser downlink transmission over a WINNER II fading channel.

스크립트 열기

Adjacent and Co-Channel Interference

Use PSK-modulated signals to show the effects of adjacent and co-channel interference on a transmitted signal.

모델 열기