|
From: | intermilan |
Subject: | RE: [Discuss-gnuradio] want to achieve the symbol rate to 270.833kb/s |
Date: | Fri, 17 Sep 2010 16:30:59 +0800 |
hi Tom: I can not find the examples what you asked me to look for.so what the version of your Gnuradio? Mine is 3.2.2. Besides, I still wonder why I can not use the resampler block in the /gnuradio-core/src/python/gnuradio/blks2impl in which I can set the value of the interpolation and decimation.and the program will automatic to set the parameters of the filter I need.I think it is capable. So can you tell some specific reasons? thank you > From: address@hidden > Date: Wed, 15 Sep 2010 07:43:42 -0400 > Subject: Re: [Discuss-gnuradio] want to achieve the symbol rate to 270.833kb/s > To: address@hidden > CC: address@hidden > > 2010/9/15 intermilan <address@hidden>: > > hi all: > > I want to make the symbol rate of the data which is transmited by > > the USRP at the 270.833kb/s.I know the OpenBTS had already make it come > > true. but what I want to know is that can I use the resampler block to make > > this happen? (put the resampler block after the GMSK Mod block )and the > > value of the interpolation and decimation of the resampler block can be the > > same as them in the OpenBTS which are 65 and 96.and the interpolation of the > > USRP is 320 which is make the sample rate of the usrp is 400k.I have not do > > it now ,just want to ask here if it is possible. > > > You should be able to use the gr.pfb_arb_resampler_ccf block to > accomplish this. It's an arbitrary resampler and so doesn't rely on > integer relationships. It can be a bit tricky to use, so look at the > examples in gnuradio-examples/src/python/pfb for help in designing the > filter for it. > > ... One of these days, I need to make a convenience wrapper for this > block that designs the filter for the half sample rate > automatically... > > Tom |
[Prev in Thread] | Current Thread | [Next in Thread] |