[srslte-users] Commercial eNodeB
Andre Puschmann
andre.puschmann at softwareradiosystems.com
Mon Sep 2 18:51:53 UTC 2019
Hey Mark,
you should not be getting any overruns with this machine and a 10 MHz
cell while only doing Rx streaming. You need to investigate this.
Perhaps use the UHD benchmark_rate example for our benchmark for Rx/Tx
performance.
Also I noticed the different antenna settings you use for the Lime. At
least on the big lime, make sure to use the right antenna connector and
that the config match the one you've actually connected.
Cheers
Andre
On 30/8/19 18:13, Mark Santorello wrote:
> I have been comparing the logs between the LimeSDR MIni and the B210.
> The Lime is timing out from a SoapySDRDevice_readStream(), and the B210
> is getting overruns...I believe those stem from the same root cause.
> Apparently, this is unique to my setup. What am I missing, here?
>
> I have a Log-Periodic antenna pointing at the tower, a 1m cable run, my
> RSRP is -40dBm, I do not have a GPSDO or external clock for either
> radio, USB3.0 into my machine, which has an Intel i7-8565U running
> Ubuntu 18.04.
>
> Thank you,
>
> Mark
>
> On Fri, Aug 30, 2019 at 9:51 AM Mark Santorello <mark.s.public at gmail.com
> <mailto:mark.s.public at gmail.com>> wrote:
>
> I've been playing with the gain, and I'm still having no luck
> decoding the PDSCH. I'm going to try some other locations,
> tomorrow, but here are the results of my latest attempt:
>
> I attached ue.log, and here is the console output:
> Reading configuration file lime.conf...
>
> Built in Release mode using commit 5343b33f on branch master.
>
> --- Software Radio Systems LTE UE ---
>
> Opening 1 RF devices with 1 RF channels...
> [INFO] [UHD] linux; GNU C++ version 7.4.0; Boost_106501;
> UHD_3.15.0.git-58-gea06c70f
> [INFO] [LOGGING] Fastpath logging disabled at runtime.
> Warning: Failed to create thread with real-time priority. Creating
> it with normal priority: Success
> Warning: Failed to create thread with real-time priority. Creating
> it with normal priority: Success
> Warning: Failed to create thread with real-time priority. Creating
> it with normal priority: Success
> Warning: Failed to create thread with real-time priority. Creating
> it with normal priority: Success
> Opening USRP with args:
> Error opening UHD: code 11
> Soapy has found device #0: addr=24607:1027, driver=lime,
> label=LimeSDR Mini [USB 3.0] 1D4C463E946EFC, media=USB 3.0,
> module=FT601, name=LimeSDR Mini, serial=1D4C463E946EFC,
> [INFO] Make connection: 'LimeSDR Mini [USB 3.0] 1D4C463E946EFC'
> [INFO] Reference clock 40.00 MHz
> [INFO] Device name: LimeSDR-Mini
> [INFO] Reference: 40 MHz
> [INFO] LMS7002M calibration values caching Disable
> Setting up Rx stream with 1 channel(s)
> Setting up Tx stream with 1 channel(s)
> [INFO] RX LPF configured
> Set Rx bandwidth to 2.50 MHz
> [INFO] Filter calibrated. Filter order-4th, filter bandwidth set to
> 5 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter
> not active
> [INFO] TX LPF configured
> Set Tx bandwidth to 5.00 MHz
> Available device sensors:
> - clock_locked
> - lms7_temp
> Available sensors for Rx channel 0:
> - lo_locked
> [ERROR] Tx Calibration: MCU error 4 (SXT tune failed)
> [INFO] Rx calibration finished
> State of gain elements for Rx channel 0 (AGC not supported):
> - TIA: 0.00 dB
> - LNA: 30.00 dB
> - PGA: -12.00 dB
> State of gain elements for Tx channel 0 (AGC not supported):
> - TIA: 0.00 dB
> - LNA: 30.00 dB
> - PGA: -12.00 dB
> Rx antenna set to LNAH
> Tx antenna set to BAND1
>
> Warning burst preamble is not calibrated for device lime_mini. Set a
> value manually
>
> Waiting PHY to initialize...
> ...
> Attaching UE...
> Searching cell in DL EARFCN=5110, f_dl=739.0 MHz, f_ul=709.0 MHz
> [INFO] Selected RX path: LNAW
> [INFO] Selected TX path: Band 2
> [WARNING] Rx LPF min bandwidth is 4MHz when TIA gain is set to -12 dB
> [INFO] RX LPF configured
> Set Rx bandwidth to 2.50 MHz
> [INFO] Rx calibration finished
> [INFO] Filter calibrated. Filter order-4th, filter bandwidth set to
> 5 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter
> not active
> [INFO] TX LPF configured
> Set Tx bandwidth to 5.00 MHz
> [INFO] Tx calibration finished
>
> Warning TX/RX time offset has not been calibrated for device
> lime_mini. Set a value manually
>
> .
> Found Cell: Mode=FDD, PCI=371, PRB=50, Ports=2, CFO=-0.6 KHz
> Set master clock rate to 11.52 MHz
> [INFO] RX LPF configured
> Set Rx bandwidth to 8.64 MHz
> SoapySDRDevice_readStream returned -6: TIME_ERROR
> SYNC: Receiving from radio while in IDLE_RX
> [INFO] Rx calibration finished
> [INFO] Filter calibrated. Filter order-4th, filter bandwidth set to
> 8.64 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis
> filter not active
> [INFO] TX LPF configured
> Set Tx bandwidth to 8.64 MHz
> [INFO] Tx calibration finished
>
> Warning TX/RX time offset has not been calibrated for device
> lime_mini. Set a value manually
>
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30
> Invalid inputs rv_idx=-1, cb_idx=30s
>
> ... REPEATS ...
>
>
> On Wed, Aug 28, 2019 at 3:35 PM Andre Puschmann
> <andre.puschmann at softwareradiosystems.com
> <mailto:andre.puschmann at softwareradiosystems.com>> wrote:
>
> Mark,
>
> we haven't tested the Lime Mini ourselves but have heard good
> stories
> from other users. We've tested with the normal Lime and this
> works fine.
> In general, the Lime works better in the sub GHz frequencies.
> Using the
> default LTE rates is a good idea. Lime calibration is done
> automatically
> in the newer LimeSuite versions.
>
> You are likely having gain issues. Try to play with the Rx gain
> settings
> in your case and send a log and/or console trace if it still doesn't
> pick up the cell.
>
> Cheers
> Andre
>
>
>
> On 16/8/19 19:50, Mark S wrote:
> > I am trying to use a low-cost SDR to attach (legitimately) to a
> > commercial eNodeB. I don't care about speed or throughput, I
> just want
> > to reliably attach.
> >
> > My low-cost SDR of choice is the LimeSDR Mini. As far as I
> can tell,
> > the Lime Mini is designed for LTE, with its 30.72 MHz sample
> rate, and
> > high-precision TCVCXO, and I was expecting pdsch_ue and srsue
> to work
> > out-of-the-box. However, pdsch_ue has an enormous miss rate,
> and srsue
> > isn't even getting past the SIB decode stage.
> >
> > Am I entirely off-base for believing that srsLTE + Lime Mini
> can support
> > this function? Do you guys have any tips or notes on a viable
> Lime MIni
> > setup?
> >
> > Thank you,
> >
> > Mark
> >
> >
> > _______________________________________________
> > srslte-users mailing list
> > srslte-users at lists.softwareradiosystems.com
> <mailto:srslte-users at lists.softwareradiosystems.com>
> > http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
> >
>
--
Andre Puschmann
Software Radio Systems (SRS)
http://www.softwareradiosystems.com
PGP/GnuPG key: 6C42AB31
fingerprint: 137A AE49 785B A445 257C 8AD7 D877 A498 6C42 AB31
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