[Discuss-gnuradio] USRP-FIFO, question about double buffering

[George Sklivanitis]

Hello all,

Lately, I am experimenting with an implementation of a point-to-point 
On-off Keying communication system. I mostly prefer to use the USRP as 
the receiver, in which I can capture samples and later process them 
through Matlab. However, because of the algorithms I try to apply at the 
receiver (packet/symbol synchronization, channel estimation, 
carrier-frequency offset cancellation, detection) I have to deal with a 
lot of delay at the receiver processing part. As a result, my 
transmitter keeps sending packets which will either get lost or stored 
at the fifo.

Therefore, I would like to know, if it is possible to construct a second 
buffer (softwarely in Matlab) in order not to lose so many data packets. 
Does anyone have an intuition about the way the fifo is used?

Thanks,
GS

--
Sklivanitis Georgios
M.Sc. Student
Telecommunications Division,
Department of Electronics and Computer Engineering
Technical University of Crete,
Kounoupidiana Campus, Office 145.A10
Chania, Crete, 73100, Greece
Tel. : 28210 59257
www.telecom.tuc.gr/~gsklivanitis