|
From: | nadia raj |
Subject: | [Discuss-gnuradio] RE: Help req: Simulataneous transmission |
Date: | Tue, 5 Jan 2010 19:28:09 +0000 |
Hi, Thankyou for your help Mr.Eric. I have been able to develop a flowgraph using your advice, however i have two q's: 1) I have used two gr.hier_block2's, one for each antenna. Now when ill create their instances one after the other, so will they execute simultaneously?? 2) If i want to send data to side A of usrp and in it TX/RX side whats the proper syntax for it. Is self.sink=usrp_sink.subdev(0,0) a correct syntax? I have got two daughter boards on one usrp. Thankyou in advance. Regards, Nadia. > Date: Mon, 4 Jan 2010 10:40:43 -0800 > From: address@hidden > To: address@hidden > CC: address@hidden > Subject: Re: Help req: Simulataneous transmission > > On Mon, Jan 04, 2010 at 06:06:51AM +0000, nadia raj wrote: > > > > Hi, > > > > Thank you Mr.Eric for your valuable advice. > > You're welcome. > > > Yes i studied and completely understood the example that you referred. > > > > I have ,with your advice solved the problem of spatial demux. > > > > Now i want to ask you that now as i have two independent streams of > > data, what stategy should i adopt to ensure that the two streams are > > transmitted simultaneously via two separate daughterboards mounted > > on onse usrp1 which is plugged into a hostpc ? > > > Shoud i make two separate threads, one for each transmitter?? > > > Each thead would take the physical layer packet (one stream of data) > > as an input, and the perform modulation + transmission of data. > > No, use a single flow graph (top_block) that contains both transmitter > paths (probably implemented as hier_block2's). As long as both paths > produce samples at the same rate, the process of combining them with > the interleaver will ensure that they reach the USRP daughterboards at > the same time. > > Eric Hotmail: Free, trusted and rich email service. Get it now. |
[Prev in Thread] | Current Thread | [Next in Thread] |