Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
GROUND BASED ANTENNA BEAMFORMING FOR COMMUNICATIONS BETWEEN ACCESS NODES AND USERS TERMINALS LINKED BY A SATELLITEN AND SATELLITE THEREFORE
Document Type and Number:
WIPO Patent Application WO/2016/195813
Kind Code:
A3
Abstract:
End-to-end beamforming systems (500) include end-to-end relays (503, 1202, 3403) and ground networks (502) to provide communications to user terminals (517) located in user beam coverage areas (519). The ground segment can include geographically distributed access nodes (515) and a central processing system (505). Return uplink signals (525), transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths (1702) in the end to end relay and are relayed to the ground network. The ground network, using beamformers (513, 531), recovers user data streams transmitted by the user terminals from return downlink signals (527). The ground network, using beamformers (513, 529) generates forward uplink signals (521) from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals (522) that combine to form user beams.

Inventors:
MILLER MARK (US)
BUER KENNETH (US)
Application Number:
PCT/US2016/026813
Publication Date:
February 23, 2017
Filing Date:
April 08, 2016
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
VIASAT INC (US)
International Classes:
H04B7/204; H04B7/185
Foreign References:
US20080051080A12008-02-28
US8923756B12014-12-30
US20070281612A12007-12-06
US6016124A2000-01-18
Attorney, Agent or Firm:
RALSTON, William et al. (US)
Download PDF: