Karl wrote:> Hi > > A squarewave subcarrier is common in satellite communication > and road tolls....I guess because its very easy to modulate > a squarewave with BPSK. One just have to count edges and then > change the reflect coefficient.I guess that at such low powers, they're not concerned with splatter. There's always more than meets the eye. Thanks. ... Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
BPSK demodulation and synchronization (square wave subcarrier)
Started by ●February 6, 2006
Reply by ●February 16, 20062006-02-16
Reply by ●February 17, 20062006-02-17
On Thu, 16 Feb 2006 06:29:20 -0600, "Karl" <rikhe521@student.liu.se> wrote:> >Hi > >A squarewave subcarrier is common in satellite communication >and road tolls....I guess because its very easy to modulate >a squarewave with BPSK. One just have to count edges and then >change the reflect coefficient. > >KarlIt is? Usually satellite transponders are very expensive resources so control of adjacent channel energy (splatter) is critical. I've not heard of using such a system for satellite communications before. For a road-toll system it's probably not as bad since the range is short and the client equipment needs to be very low-cost. I dunno what sort of equipment is used for those, though. Eric Jacobsen Minister of Algorithms, Intel Corp. My opinions may not be Intel's opinions. http://www.ericjacobsen.org
