Re: [USRP-users] Phase after Freq Hopping

2019-03-18 Thread Patscheider, Dominik via USRP-users
Hey, What I wanted to achieve is a stepped OFDM Radar. To increase the baseband for the radar, I´m splitting the subcarrier and transmit them on four center frequencies. Thus it sends the first symbols on f0 (with an initial phase); afterwards increasing the center freq to f1 and transmit the

Re: [USRP-users] Phase after Freq Hopping

2019-03-18 Thread Piotr Krysik via USRP-users
Hi Dominik W dniu 18.03.2019 o 10:49, Patscheider, Dominik pisze: > Hi Piotr Krysik, > > I wanted to achieve an stepped OFDM Radar. > To increase the baseband for the radar, I´m splitting the subcarrier and > transmit them on four center frequencies. > Thus it sends the first symbols on f0 (wi

Re: [USRP-users] Phase after Freq Hopping

2019-03-18 Thread Fabian Schwartau via USRP-users
Hi, why do you need to know/define the absolute phase of the transmitted signal? Phase is always relative to something. When impleneting a radar, you transmit a signal with an unknwon (absolute) phase. But this is not a problem, because after reception you will somehow correlate the transmitt

[USRP-users] Fwd: [Discuss-gnuradio] European GNU Radio Days contribution deadline (March 21st)

2019-03-18 Thread Philip Balister via USRP-users
Forwarded Message Subject: [Discuss-gnuradio] European GNU Radio Days contribution deadline (March 21st) Date: Mon, 18 Mar 2019 10:50:51 + From: jean-michel.fri...@femto-st.fr To: discuss-gnura...@gnu.org The European GNU Radio Days contribution deadline is getting close

[USRP-users] E310 IMU

2019-03-18 Thread Jason Matusiak via USRP-users
I've started playing with the E310's IMU and I keep seeming to go around in circles. All I really want is a heading. I have my own app that is heavily borrowed from the RTIMULibDemo included on the device (and from github), but I can't seem to get the heading still right when dealing with the

Re: [USRP-users] E310 IMU

2019-03-18 Thread Jason Matusiak via USRP-users
As usual, I should have emailed days ago since I found the answer just afterwards. Using the code from here: https://github.com/kriswiner/MPU9150/blob/master/MPU9150BasicAHRS.ino I was able to get good values. q[0] is w in his equation. From: Jason Matusiak Se

Re: [USRP-users] Phase drift issue of N310

2019-03-18 Thread Tillson, Bob (US) via USRP-users
Same Daughterboard is same LO, right, so things should be exactly the same on ch0-ch1 and ch2-ch3... -Original Message- From: USRP-users On Behalf Of Damon via USRP-users Sent: Monday, March 18, 2019 1:26 PM To: Marcus D. Leech ; usrp-users@lists.ettus.com Cc: Damon Qiu Subject: Re: [U

Re: [USRP-users] Phase drift issue of N310

2019-03-18 Thread Marcus D. Leech via USRP-users
On 03/18/2019 01:26 PM, Damon wrote: Hi Marcus, Sorry, I can't reproduce the first observation in this discussion thread. A new problem about phase response has arisen. I am testing the phase coherence performance of four receiving channels of N310. A B200 is transmitting single tone continuou