MULTI-USER MIMO VIA ACTIVE SCATTERING PLATFORMS

摘要

Aircrafts flying near Earth or naval vessels are used as active scattering platforms in a multipath communications channel in MIMO communications systems. These man-made platforms in a communications channel, with techniques of beam forming and wavefront multiplexing in both transmitters at source and receivers at destinations enhance the ability to coherently combine the power of the communication signals, and improve the signal-to-noise ratio in addition to the MIMO advantage of multiple times of channel capacity over a finite bandwidth via frequency reuse. These platforms may be stationary, mobile ground based, or ocean surface based. They may also be airborne, or space borne. A swarm of 10's micro-UAV based mini-transponders is an example through active scattering of these micro-UAV to generate 10× more available bandwidth between a base station and ground mobile users over same bandwidth.

主权项

1. A MIMO communication system comprising a transmitter with a preprocessor and multiple antenna elements, N remote receivers, and a multipath communication channel, where N≧1:
wherein the transmitter is configured to measure current channel status information (C SI) by sending probing signals, receiving responses of probing signals from the remote receivers, and then updating the current CIS and configurations of the preprocessing; wherein the multiplath communications channel further comprising wireless communications electronic systems on multiple platforms configured to actively scatter wirelessly communications signals originated from the transmitter toward multiple remote receivers in different locations.