SatSig topic:

Need Information Carrier in Carrier

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Jun 7^th, 2013 at 3:28am

Dear All
Need the simple illustration or description of carrier in carrier technology.
Best Regards
tagor muda dalimunthe

Jun 7^th, 2013 at 9:34am

Carrier in Carrier refers to a Comtech technique for making use of satellite bandwidth by transmitting two carriers on top of one another, like so:

Provided each earth station is in the same coverage beam and can therefore see its own transmitted signal, it is able to subtract a delayed version of its own transmit carrier from the received carriers and thus remove the 'interference'.

I've heard of the very successful use of this technique on a point to point link between a pair of large earth stations, with whole transponders being fully utilised, twice over !

Read full explanation here:
https://www.comtechefdata.com/files/articles_papers/WP-Doubletalk%20Carrier-in-C...
( From where the above spectrum analyser images are reproduced. )

Best regards, Eric.

Jun 7^th, 2013 at 12:30pm

First I've heard of Carrier in Carrier (CiC?). Sounds to me like just another name for CDMA, which has been around for over 50 years.

//greg//

Feb 18^th, 2014 at 5:11am

I can confirm that it is very good to use.

Would also save a lot of $$$ in bandwidth.