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To: John Biddle who wrote (33221)3/7/2003 6:56:37 AM
From: John Biddle  Read Replies (1) | Respond to of 196694
 
ViaSat Unveils CDMA-based Broadband VSAT Delivery System
By Mark Long -- e-inSITE, 3/6/2003

e-insite.net

ViaSat Inc. is claiming the rights to having the world's first interactive, broadband satellite networking system to integrate CDMA technology.

Designed to reduce satellite bandwidth costs, the new ArcLight VSAT system is compatible with the same DVB-S standard that broadcasters currently use to uplink their satellite TV signals. According to ViaSat, the same hub uplink equipment can now be used for both broadband and TV deliver over a single unified network.

The ArcLight hub broadcasts to remote terminals at aggregate speeds ranging from 2 to 45 Mbits/sec, while remotes can return data to the hub at speeds from 32 to 512 Kbits/sec. Potential applications include Internet access, streaming multimedia, extending access to corporate networks, and distance learning.

"Customers today are seeing a mix of different kinds of traffic on their networks," said ViaSat's Comsat Laboratories division president Ben Pontano in a prepared statement. "The innovative technologies in ViaSat VSATs can meet all of those needs in a single network without having to worry about how your requirements might change in the future."

ArcLight combines CDMA with ViaSat's Paired Carrier Multiple Access (PCMA) technology, which the company claims will allow satellite operators to significantly increase the number of customers that they can support over a single satellite transponder. ViaSat's CDMA (Code Reuse Multiple Access) is the satellite technology that remote sites will use to transmit information to the ArcLight hub over the return channel.

ViaSat's Paired Carrier Multiple Access (PCMA) technology has been designed to enable both the CDMA return channels and the outbound carrier from the hub DVB to occupy the same physical frequency on the satellite platform, saving capacity by eliminating the need for separate bandwidth on each side of the link. The CDMA technology's random access design also will enable terminals to burst their data
or route requests for information back to the hub at any given moment, with the end result that users will be given faster access to the network than what other VSAT products currently deliver.

Since the ArcLight hubs employ the same DVB-S compatible uplink equipment that ViaSat delivers to its LinkStar satellite TV broadcasting customers, the new technology can be added to their hub installations to enable the transmission of a variety of multimedia applications over a single network. Already in beta testing, ArcLight is scheduled to become commercially available in 2Q03.