如何在 BladeRF A4 上運行 OpenAirInterface (OAI) 5G SA 的軟調變解調器

Question

我在使用 BladeRF A4 製作 OAI 5G SA 時遇到問題

我使用 Ubuntu 22.04.2 LTS (Jammy Jellyfish) 桌面，版本為 5.19.0-46-generic。我在開發分支上嘗試OAI並在bladeRF A4上運行。我遵循這個關聯，建議不要使用指令./build_oai -I -w BLADERF，而是從來源安裝bladeRF。

我完成了bladeRF庫的下載，並且可以透過命令正確使用互動模式bladeRF-cli -i。我使用該命令為bladeRF設定必要的參數。設定結果如下所示。

$ sudo bladeRF-cli -i
bladeRF> print frequency

  RX1 Frequency: 2400000000 Hz (Range: [70000000, 6000000000])
  RX2 Frequency: 2400000000 Hz (Range: [70000000, 6000000000])
  TX1 Frequency: 2400000000 Hz (Range: [47000000, 6000000000])
  TX2 Frequency: 2400000000 Hz (Range: [47000000, 6000000000])

bladeRF> print gain

  Gain RX1 overall:   60 dB (Range: [-15, 60])
              full:   71 dB (Range: [-4, 71])
  Gain RX2 overall:   60 dB (Range: [-15, 60])
              full:   71 dB (Range: [-4, 71])
  Gain TX1 overall:   56 dB (Range: [-23.75, 66])
               dsa:  -90 dB (Range: [-89.75, 0])
  Gain TX2 overall:   56 dB (Range: [-23.75, 66])
               dsa:  -90 dB (Range: [-89.75, 0])

bladeRF> print bandwidth

  RX1 Bandwidth:  18000000 Hz (Range: [200000, 56000000])
  RX2 Bandwidth:  18000000 Hz (Range: [200000, 56000000])
  TX1 Bandwidth:  18000000 Hz (Range: [200000, 56000000])
  TX2 Bandwidth:  18000000 Hz (Range: [200000, 56000000])

bladeRF> print samplerate

  RX1 sample rate: 30720000 0/1 (Range: [520834, 122880000])
  RX2 sample rate: 30720000 0/1 (Range: [520834, 122880000])
  TX1 sample rate: 30720000 0/1 (Range: [520834, 122880000])
  TX2 sample rate: 30720000 0/1 (Range: [520834, 122880000])

我所提到的都是步驟 1 - 3 的一部分關聯。現在我在步驟 4 中遇到問題，它說我現在可以運行 Softmodem。此處包含此步驟的說明。

4. Tune the RX gain using the enb tracer.

    Run the softmodem and the 'enb' tracer. For instructions, see:

        https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/T/basic

    In the enb window, check the 'input signal'. You should see some blue
    signal as seen at:

        https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/T/enb

請幫我如何運行softmodem？ 如何正確建構bladeRF運行5G SA的OAI？

注意：我嘗試這個關聯因為這裡有softmodem指令。

sudo ./nr-softmodem -O ../../../targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1.106PRB.usrpb210.conf --gNBs.[0].min_rxtxtime 6 --rfsim --sa

但是當我追蹤命令以查看他們打開專案的位置時，資料夾內targets/PROJECTS/GENERIC-NR-5GC/CONF沒有與bladeRF相關的內容，只有USRP，它是來自Ettus的SDR

~/ubuntu_work2/openairinterface5g/targets/PROJECTS/GENERIC-NR-5GC/CONF$ ls
cu_gnb.conf
du_gnb.conf
gnb0.sa.band261.fr2.64PRB.prs.usrpx310.conf
gnb0.sa.band78.fr1.106PRB.prs.usrpx310.conf
gnb1.sa.band261.fr2.64PRB.prs.usrpx310.conf
gnb1.sa.band78.fr1.106PRB.prs.usrpx310.conf
gnb.band78.sa.fr1.106PRB.2x2.usrpn310.conf
gnb.band78.sa.fr1.162PRB.2x2.usrpn310.conf
gnb.band78.tm1.106PRB.usrpn300.gtp-itti.conf
gNB_SA_40_2x2.conf
gnb.sa.band41.fr1.106PRB.usrpb210.conf
gnb.sa.band41.fr1.52PRB.usrpb210.conf
gnb.sa.band66.fr1.106PRB.usrpn300.conf
gnb.sa.band66.fr1.106PRB.usrpx300.conf
gnb.sa.band66.fr1.24PRB.usrpx300.conf
gnb.sa.band66.fr1.25PRB.usrpx300.conf
gnb.sa.band77.fr1.273PRB.2x2.usrpn300.conf
gnb.sa.band77.fr1.273PRB.usrpx300.conf
gnb.sa.band78.fr1.106PRB.2x2.usrpn300.conf
gnb.sa.band78.fr1.106PRB.usrpb210.4layer.conf
gnb.sa.band78.fr1.106PRB.usrpb210.conf
gnb.sa.band78.fr1.106PRB.usrpb210.sabox.conf
gnb.sa.band78.fr1.162PRB.2x2.usrpn300.conf
gnb.sa.band78.fr1.217PRB.2x2.usrpn300.conf
gnb.sa.band78.fr1.24PRB.usrpb210.conf
pnf.sa.band78.rfsim.conf
uecap_ports1.xml
uecap_ports2.xml
ue.conf
ue.nr.prs.fr1.106prb.conf
ue.nr.prs.fr2.64prb.conf
vnf.sa.band78.106prb.rfsim.conf