initial prach implementation. Splitting of components for RU (FFTs) and L1 (detection). Update of UE to include all formats (for 30 kHz SCS case on initial BWP)

Test x310

See merge request oai/openairinterface5g!585

CI: adding support for the N300 gNB + NR-UE testing

See merge request oai/openairinterface5g!586

removing old mimo mode

See merge request oai/openairinterface5g!587

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

  -- pipeline is polling the develop-nr branch
  -- new conf file / new scenario files
  -- main python now supports LTE and 5G-NR executables in a Ubuntu/CentOS env

Integration 2019 w18

See merge request oai/openairinterface5g!582

Merge remote-tracking branch 'origin/Develop-nr-threequarter_fs-80mhz-x310' into integration_2019_w18

1. Fix code generated from ASN.1 of F1AP v15.4.0 failed to be compiled
2. Fix incorrect UPER encoding for empty extensible SEQUENCE in 38.331
3. Fix the problem that duplicate type names exist in OPEN TYPE

The changes made in this branch is to enable -E(threequarter sampling rate) option for mu=1 and 217PRB(ie; 80 MHz) to run on USRP x310.

Final --phy_simulators warning removals for this branch, and former polar coding function corrections

--phy_simulators warning removals, except for nr_dlsim. Polar coding old implementation's approximation and a priori information options needs to be corrected or removed