Nick
01-26-07, 10:24 AM
The European Space Agency says it has developed satellite radio technology that
eliminates singal loss in tunnels and other reception difficulties. The new technology
centers around a newly designed flat mobile antenna built directly into a vehicle's roof.
Current satellite radio services from XM and Sirius transmit to mobile satellite receivers
using proprietary communication satellites often assisted in areas by a rural network
of transmitter masts. ESA's new mobile antenna receives signals in the frequency band
already being used by existing communication satellites.
In addition, the group said, ESA's system employs a cache memory - i.e. a hard disk
or its solid-state equivalent. Received signals are stored and played back after a
short time shift - or much later - thereby preventing signal loss in tunnels or behind
obstructions. Users can also choose a specific part of a program to listen to or pause.
www.SkyReport.com - used with permission
eliminates singal loss in tunnels and other reception difficulties. The new technology
centers around a newly designed flat mobile antenna built directly into a vehicle's roof.
Current satellite radio services from XM and Sirius transmit to mobile satellite receivers
using proprietary communication satellites often assisted in areas by a rural network
of transmitter masts. ESA's new mobile antenna receives signals in the frequency band
already being used by existing communication satellites.
In addition, the group said, ESA's system employs a cache memory - i.e. a hard disk
or its solid-state equivalent. Received signals are stored and played back after a
short time shift - or much later - thereby preventing signal loss in tunnels or behind
obstructions. Users can also choose a specific part of a program to listen to or pause.
www.SkyReport.com - used with permission