06240072 is referenced by 45 patents and cites 9 patents.

The satellite communication system uses defocused feed arrays to generate a large number of beams that cover a number of regions. The ground gateways are assigned the same frequency spectrum. The beams are divided into multiple groups and each group is controlled by a different ground gateway. The signals within each group are coherent. Each gateway can then control the set of beams landing on its neighboring territory.

Title
Piecewise coherent beamforming for satellite communications
Application Number
9/55622
Publication Number
6240072 (B1)
Application Date
April 6, 1998
Publication Date
May 29, 2001
Inventor
Jue Chang
Plano
TX, US
Wing Lo
Plano
TX, US
Agent
John D Crane
US
Assignee
Nortel Networks
US
IPC
H04B 7/204
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