[Discuss-gnuradio] Decimation rate of log power fft block question

2015-06-29 Thread Mahajan, Sahil
Hello everyone I am trying to integrate the output of a spectrum analyzer in real time. I sent the output of the osmocom source to a log power fft block, which is then sent to a meta file sink. In order for the program to calculate the correct timestamp for each item, the meta file sink needs

Re: [Discuss-gnuradio] Decimation Rate with a fraction part

2011-03-07 Thread Alexander Chemeris
Hi Nick, You could use USRP1 plus our ClockTamer to get exact sampling rate right from the USRP without fractional resampling. You could find more information on the GnuRadio wiki and at ClockTamer google-code site -- Regards, Alexander Chemeris On 3 Mar 2011 23:06, "Nick Othieno" wrote: Hi al

Re: [Discuss-gnuradio] Decimation Rate with a fraction part

2011-03-04 Thread Nick Othieno
Thanks MB. On Fri, Mar 4, 2011 at 9:51 AM, Martin Braun wrote: > On Fri, Mar 04, 2011 at 08:51:28AM -0500, Nick Othieno wrote: > > Thanks guys. The ideas looks theoretically sound, but for some reason the > grc > > setup I have created does not seem to like the idea of very large > interpolation

Re: [Discuss-gnuradio] Decimation Rate with a fraction part

2011-03-04 Thread Martin Braun
On Fri, Mar 04, 2011 at 08:51:28AM -0500, Nick Othieno wrote: > Thanks guys. The ideas looks theoretically sound, but for some reason the grc > setup I have created does not seem to like the idea of very large > interpolation > and decimation values. It does not print out any errors, it just hangs

Re: [Discuss-gnuradio] Decimation Rate with a fraction part

2011-03-04 Thread Nick Othieno
Thanks guys. The ideas looks theoretically sound, but for some reason the grc setup I have created does not seem to like the idea of very large interpolation and decimation values. It does not print out any errors, it just hangs. I have attached a copy of my grc setup. On Thu, Mar 3, 2011 at 3:39

Re: [Discuss-gnuradio] Decimation Rate with a fraction part

2011-03-03 Thread Brian Padalino
On Thu, Mar 3, 2011 at 3:04 PM, Nick Othieno wrote: > Hi all, > > I would like to get an output of 16.3676 Ms/s. Is it then possible to set a > decimation values of 6.109631223? I am wondering whether decimation values > have to be whole numbers, or whether decimation values with fraction parts >

[Discuss-gnuradio] Decimation Rate with a fraction part

2011-03-03 Thread Nick Othieno
Hi all, I would like to get an output of 16.3676 Ms/s. Is it then possible to set a decimation values of 6.109631223? I am wondering whether decimation values have to be whole numbers, or whether decimation values with fraction parts are allowed. The reason for this is that I am trying to mimic t

Re: [Discuss-gnuradio] decimation rate of GSM

2009-02-05 Thread Johnathan Corgan
On Thu, Feb 5, 2009 at 11:21 AM, Jane Chen wrote: > Thank you so much for your reply. I would like to make sure I don't > misunderstand what you mentioned. Do you mean that I can choose a > decimation factor less than 320 (64M/200k) (without considering the 6dB > droop at the passband edges at t

Re: [Discuss-gnuradio] decimation rate of GSM

2009-02-05 Thread Jane Chen
e the decimation factor  lower to see what the differences are between them. Thank you, Jane From: Johnathan Corgan To: Jane Chen Cc: discuss-gnuradio@gnu.org Sent: Wednesday, February 4, 2009 6:45:26 PM Subject: Re: [Discuss-gnuradio] decimation rate of GSM 200

Re: [Discuss-gnuradio] decimation rate of GSM

2009-02-04 Thread Johnathan Corgan
2009/2/4 Jane Chen : > I have a question about the decimation rate of GSM (channel is 200kHz wide). > > I search the decimation rate of GSM for GNURadio on the Google. I got some > information from > http://www.segfault.net/gsm/The_Beginners_Guide_to_analyzing_GSM_data_in_MatLab.pdf > > However,

[Discuss-gnuradio] decimation rate of GSM

2009-02-04 Thread Jane Chen
Hi all, I have a question about the decimation rate of GSM (channel is 200kHz wide). I search the decimation rate of GSM for GNURadio on the Google.  I got some information from http://www.segfault.net/gsm/The_Beginners_Guide_to_analyzing_GSM_data_in_MatLab.pdf However, I don't understand why 

Re: [Discuss-gnuradio] Decimation rate

2008-09-03 Thread Eric Blossom
On Thu, Sep 04, 2008 at 12:56:13AM +, WeiXiaowei wrote: > > Hi, > > In gnuradio 3.1.2, we can actully get 16MHz bandwidth when using > 8-bit per sample (8 bit for I and Q respectively) and decimation = > 4, the lowest decimation value defined in the software. > > Does anyone know whether it is

[Discuss-gnuradio] Decimation rate

2008-09-03 Thread WeiXiaowei
Hi, In gnuradio 3.1.2, we can actully get 16MHz bandwidth when using 8-bit per sample (8 bit for I and Q respectively) and decimation = 4, the lowest decimation value defined in the software. Does anyone know whether it is possible to set demication rate to be 2 to double the bandwidth whe