yigid/openairinterface5g
1
0
Fork 0
mirror of https://gitlab.eurecom.fr/oai/openairinterface5g.git synced 2026-07-13 04:30:28 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'origin/if-freq-doc' into integration_2025_w50 (!3807)

Browse Source 
doc: Update doc for IF setup

Update IF setup doc, clarify how to set if_freq with large value in the gNB
configuration file. Per the libconfig manual, 64-bit integers are represented
like regular integers but require an appended "L"
(https://www.hyperrealm.com/libconfig/libconfig_manual.html#g_t64_002dbit-Integer-Values).
This commit is contained in:
Jaroslava Fiedlerova
2025-12-10 14:18:31 +01:00
parent 63f3fb55ae 45827ee213
commit d569e7ddc9
1 changed files with 19 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
doc/RUNMODEM.md
View File

@@ -470,19 +470,30 @@ The hardcoded DRBs will be treated like GBR Flows. Due to code limitations at th
## IF setup with OAI
OAI is also compatible with Intermediate Frequency (IF) equipment. This allows to use RF front-end that with arbitrary frequencies bands that do not comply with the standardised 3GPP NR bands.
OAI is also compatible with Intermediate Frequency (IF) equipment, allowing the
use of RF front-ends operating on arbitrary frequency bands that do not conform
to the standardized 3GPP NR bands.
To configure the IF frequencies it is necessary to use two command-line options at UE side:
- `if_freq`, downlink frequency in Hz
- `if_freq_off`, uplink frequency offset in Hz
### OAIUE configuration
To configure IF frequencies on the UE side, provide the following command-line
options:
- `if_freq`: DL frequency in Hz
- `if_freq_off`: UL frequency offset in Hz
Accordingly, the following parameters must be configured in the RUs section of the gNB configuration file:
- `if_freq`
- `if_offset`
### gNB configuration
On the gNB side, the corresponding parameters must be set in the RUs section of
the configuration file:
- `if_freq`: DL frequency in Hz
- `if_offset`: UL frequency offset in Hz
> Note: When using a libconfig-based configuration file for the gNB, ensure that
> `if_freq` numeric value is suffixed with "L" so it is correctly parsed as
> 64-bit integer.
### Run OAI with custom DL/UL arbitrary frequencies
The following example uses DL frequency 2169.080 MHz and UL frequency offset -400 MHz, with a configuration file for band 66 (FDD) at gNB side.
The following example uses DL frequency 2169.080 MHz and UL frequency offset
-400 MHz, with a configuration file for band 66 (FDD) at gNB side.
On two separate machines with USRPs, run: