Urban multipath can be extremely complex, particularly with devices in motion. Remcom offers a unique ray tracing capability for simulating these effects and predicting MIMO system performance.
MIMO Capabilities in Wireless InSite
Wireless InSite’s MIMO capability makes it possible to predict accurate path data between each transmitting and receiving element with precision and reveals key channel characteristics in a timely manner. With optimizations that minimize runtime and memory constraints, Wireless InSite is able to efficiently simulate even the large arrays present in Massive MIMO systems.
Wireless InSite’s MIMO array builder gives users the ability to create 1D, 2D, and 3D antenna arrays. Users have control over every aspect of their model and can define unique antenna patterns and orientations for each element. All data is accessible, allowing results to be visualized within the context of the scene, as a 2D plot, or exported to a file. Post-processing options include received power, complex channel matrix or H-matrix, complex impulse response, times of arrival, directions of arrival, and directions of departure for multipath.
Massive MIMO Beamforming in Motion
Remcom performed a study using Wireless InSite's MIMO capability to generate the complex channel matrix, or H-matrix, for each of several mobile devices in an urban scene. We then applied Maximum Ratio Transmission (MRT) and Zero Forcing (ZF) beamforming algorithms to the H-matrices to visualize beamforming in motion. These animations show the beam formed from a massive MIMO base station (green dot) to a mobile device moving along a route (large red dot), in the presence of 15 other stationary devices (red circles). MRT maximizes the beam to the intended device, while ZF beamforming attempts to also minimize the interference to the other devices.
Maximum Ratio Transmission Beamforming using Wireless InSite
Zero Forcing Beamforming using Wireless InSite