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Propagation et modèles de canaux
La modélisation de la propagation des chemins RF décrit le comportement du rayonnement électromagnétique à partir d’un point d’émission pendant que le signal traverse l’environnement. Vous pouvez modéliser les chemins de propagation RF et les visualiser en 3D.
La modélisation de canal décrit l’environnement radio des liaisons des systèmes de communications. L’analyse de modèles de propagation et de canaux est essentielle pour comprendre les pertes subies par les ondes électromagnétiques entre un émetteur et un récepteur dans différents scénarios. Il est possible de modéliser et de visualiser des canaux SISO et MIMO bruités avec des profils d’affaiblissement Rayleigh, Rician ou WINNER II. Des imperfections atmosphériques sont également disponibles ainsi que diverses formes de spectre Doppler.
Fonctions
Objets
Blocs
Rubriques
Propagation RF
- 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. (depuis R2023b)
Modélisation de canal
- AWGN Channel
Model channel and RF impairment characteristics. - 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.
Sélection d՚exemples
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.
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.
Urban Link and Coverage Analysis Using Ray Tracing
Use ray tracing to analyze communication links and coverage areas in an urban environment.
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.
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.
GSM, CDMA and WiMAX Channel Models
Simulate multipath fading channels defined for GSM, EDGE, CDMA, and WiMAX wireless standards.
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.
Multipath Fading Channel in Simulink
Simulate multipath Rayleigh and Rician fading channels by using the SISO Fading Channel block.
HF Ionospheric Channel Models
Simulate High-Frequency (HF) ionospheric channels, based on the models described in Recommendation ITU-R F.1487.
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.
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.
Adjacent and Co-Channel Interference
Use PSK-modulated signals to show the effects of adjacent and co-channel interference on a transmitted signal.
