Search results for all lists

7279 messages found
Sort by
List: usrp-users@lists.ettus.com
From: Zohair ABU SHABAN
 
Re: [USRP-users] Symbol Synchronous recording
Mon, Dec 9, 2013 2:21 PM
My question was a two-fold question and sorry for that not being clear enough. 1- The sampling rate issue which can be solved as I understand by changing the oscillator of be resampling in software. 2- The second issue is that, assuming the first issue is sorted out; there would be timing offset that needs to be estimated for a communication
List: usrp-users@lists.ettus.com
From: Marcus Müller
 
Re: [USRP-users] N210 RX has fixed 900MHz carrier
Tue, Sep 9, 2014 1:08 PM
SBX is pretty sensitive and has a low noise figure, so I'd expect noise floor with fully pumped up LNA to be equivalent to something like -166dBm/Hz or so; without knowing your spectral resolution when looking at the background noise, it's hard to estimate the power of your 900MHz peak.
List: usrp-users@lists.ettus.com
From: David Browne
 
Quandry over B210 noise performance
Thu, Jul 23, 2015 2:30 PM
rate: 32 MHz rx frequency : 5.8 GHz rx sample rate : 400 kHz UHD version : UHD_003.007.001-84-gd99ce4ef Measurements were made on the RX2 ports (both the A:A and A:B sub-devices produced similar results) Noise power was computed after first filtering the DC component (~0.6dB) from the IQ samples to prevent LO leakage at DC from biasing the noise estimator
List: usrp-users@lists.ettus.com
From: Ludwig Stephan (CR/AEH4)
 
N210+SBX40MHz: Transfer Function of RF path?
Thu, Feb 18, 2016 4:29 PM
I use a OFDM (802.11g) transmission signal @2.45 GHz carrier frequency for estimating the channel in frequency domain. Everything works fine, I even receive data packets without error. But when I use a coax cable between Tx and Rx, I do not obtain a flat transfer function as I expect (cp. Attached image).
List: usrp-users@lists.ettus.com
From: Martin Braun
 
FOSDEM 2017: SDR Track CfP
Tue, Oct 18, 2016 10:27 PM
Lengths aren't fixed, but give a realistic estimate and please don't exceed 30 minutes unless you have something special planned (in that case, contact one of us). Also, don't forget to include time for Q&A. You aren't limited to slide presentations, of course. Be creative.
List: usrp-users@lists.ettus.com
From: nur qalbi
 
Re: [USRP-users] Error using coder.internal.errorIf (line 8) The input signal must be complex.
Mon, Sep 11, 2017 3:17 AM
% Coarse Frequency Offset Estimation (CFE) 66. ofs = step(he,ddf); 67. % Frequency Offset Compensation (FOC) 68. tmp = step(hf,tmp,-ofs); 69. % Raised Cosine Receive Filtration (RCRF) 70.
List: usrp-users@lists.ettus.com
From: Marcus Müller
 
Re: [USRP-users] Audio Control loop testing
Mon, Sep 18, 2017 8:40 PM
In a software receiver, you need to estimate the offset of the audio DAC clock from the sender's audio clock. That's hard to do properly, because these clock offsets might be to fine to do it with general purpose PC CPU software. But we've talked about all that before on the Discuss-gnuradio list!
List: time-nuts@lists.febo.com
From: Garren Davis
 
RE: [time-nuts] New TAPR "TADD" kit in the works -- are you interested?
Fri, Dec 23, 2005 5:35 PM
We don't have a price set yet (it will depend in part on the volume we do) but a very rough estimate is $60-$90 for the kit. We are also working on an enclosure that will work with this, and all the other, TADD kits, but we don't have availability or pricing information available yet.
List: time-nuts@lists.febo.com
From: Stephan Sandenbergh
 
Re: [time-nuts] Linear Interpolator
Thu, Jun 29, 2006 9:04 AM
Question 3: Is it possible to calculate/estimate the actual resolution due to dithering? Maybe you need the frequency spread of the 1PPS? Question 4: I will probably be much better off EMI wise with a much slower clock. Also, I would at least like to max out the M12+T's 2ns resolution. Thus, can anyone maybe point me to some good interpolation ICs?
List: time-nuts@lists.febo.com
From: Didier Juges
 
Re: [time-nuts] Super stable BVA Quartz resonators... BVA??
Sat, Dec 8, 2007 12:58 AM
If phase noise or short term stability encompasses frequency jumps, how can I estimate the size of frequency jumps from those specifications?