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.

Compute and visualize outdoor wireless coverage between a transmitter and receiver. This includes:

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.

Use ray tracing to analyze communication links and coverage in an urban environment. Within the example:

Simulate multipath fading channels defined for GSM/EDGE [ 1 2 ], CDMA [ 3 ], and WiMAX [ 4 ] wireless standards. The example uses the Rayleigh and MIMO fading channel System objects™ from Communications Toolbox™ to simulate and visualize the channels.

Use Rayleigh and Rician multipath fading channel System objects and their built-in visualization to model a fading channel. Rayleigh and Rician fading channels are useful models of real-world phenomena in wireless communication. These phenomena include multipath scattering effects, time dispersion, and Doppler shifts that arise from relative motion between the transmitter and receiver.

How to use the SISO Fading Channel block from the Communications Toolbox™ to simulate multipath Rayleigh and Rician fading channels, which are useful models of real-world phenomena in wireless communications. These phenomena include multipath scattering effects, time dispersion, and Doppler shifts that arise from relative motion between the transmitter and receiver. The model also shows how to visualize channel characteristics such as the impulse and frequency responses, Doppler spectrum and component gains.

Simulate High-Frequency (HF) ionospheric channels, based on the models described in Recommendation ITU-R F.1487. In particular, it shows how to simulate the general Watterson channel model, and other simplified channel models used in the quantitative testing of HF modems. It makes use of the comm.RayleighChannel System object™ and stdchan function along with the Gaussian and bi-Gaussian Doppler structures from Communications Toolbox™.

Set up a system with multiple base stations (BS), multiple mobile stations (MS) and multiple MIMO downlinks from one BS sector to one MS. You must download and install the WINNER II Channel Model for Communications Toolbox™ Add-On to run this example. Each link is assigned with a propagation scenario and condition. Fading channel coefficients for all links are generated simultaneously. An impulse signal is passed through the fading channel for each link. The received impulse and frequency responses are plotted for selected links.

The transmit and receive processing for a 802.11ac™ multi-user downlink transmission over a WINNER II fading channel. You must download and install the WINNER II Channel Model for Communications Toolbox™ Add-On to run this example. Only one WINNER II channel System object™ is needed to set up the channels from one access point to all users.

The effects of adjacent and co-channel interference on a PSK modulated signal. The model includes two interferers, Interferer 1 and Interferer 2. The model enables you to modify the frequency offset and the power gain of each interferer, and view the effects on a spectrum plot.

Provides visualization capabilities to see the effects of RF impairments and corrections in a satellite downlink. The link employs 16-QAM modulation in the presence of AWGN and uses a High Power Amplifier (HPA) to overcome the losses associated with satellite communications. The HPA introduces nonlinear behavior that, when combined with other RF impairments, requires the use of mitigation techniques.

Multiple-Input-Multiple-Output (MIMO) systems, which use multiple antennas at the transmitter and receiver ends of a wireless communication system. MIMO systems are increasingly being adopted in communication systems for the potential gains in capacity they realize when using multiple antennas. Multiple antennas use the spatial dimension in addition to the time and frequency ones, without changing the bandwidth requirements of the system.