- We use the same function at gNB and UE.
 - We always use nb_antennas_tx to check the max possible number of ports (which is wrong).
 - At gNB, we should use nb_antennas_rx and at the UE, we should use nb_antennas_tx.

The memory alignment is required to use c16multaddVectRealComplex
in SRS channel interpolation. With a change in SRS comb_offset, the
existing algorithm was giving segmentation fault.

The existing srs channel estimation required memory alignment at two
stages. 1. When k = 0 (the first srs subcarrier), 2. When subcarrier <
K_TC (wrapped around after ofdm_symbol_size). Thus two memory alignments
are required leading to complications.

The srs channel estimation is now simplified to do it linearly instead of
wrapping around. This simplified the memory alignment required only when
k = 0.

Update T traces to record toa in ns and SRS time/frequency channel over multiple rx antennas and ports

- Introduce signal energy and noise variance functions
- Combine rotation and OFDM modulation RX as a function
- Harmonize the use of number of antennas across the code
- Rename nr_ue_pusch_common_procedures() to nr_tx_rotation_and_ofdm_mod() to decribe the functionality better

rewrite nr_srs_channel_estimation() to loop over rx antennas and antenna ports to be able to parallelize

Integration: `2026.w02`

* !3828 L2 UE files code cleanup for static functions
* !3839 Couple rfsim fixes
* !3835 Correctly include cblas include directories for RHEL
* !3840 Fix missing return statements in SIB1 TDA validation
* !3836 move NTN UE L1 functions to a new file
* !3793 CI: Remove redundant Jenkinsfiles
* !3770 RRC UE: Implement proper NH chain synchronization for RRC Reestablishment
* !3843 fix(documentation): issue 1042
* !3842 Remove unused cmake_targets files
* !3832 Remove global iq_txshift and iq_rxrescale
* !3847 Minor CI and nr_ulsim reporting adjustments
* !3838 NR NGAP (N2HO) : Fix Time UE Stayed in Cell IE type and calculation
* !3677 Support prach with start symbol of PRACH not at symbol 0

Closes #1042 and #857

See merge request oai/openairinterface5g!3841

Support prach with start symbol of PRACH not at symbol 0

The following PRACH indice have been tested.

    index / format (nf mod x = y) / Subframe/ start_symbol /no_of_slot / occ / duration
    152     B4     2 1                4,9          0               2      1    12
    151     B4     2 1                4,9          2               1      1    12
    157     B4     1 0                 4           0               1      1    12
    159     B4     1 0                 9           0               1      1    12

NR NGAP (N2HO) : Fix Time UE Stayed in Cell IE type and calculation

According to 3GPP TS 38.413, the 'Time UE Stayed in Cell' IE is an
integer ranging from 0 to 4095. This patch updates the data structure
to reflect the correct bit width and implements the dynamic calculation
based on the UE's residence time.

- Change time_in_cell from long to uint16_t in ngap_messages_types.h.
- Replace dummy value with real-time calculation in rrc_gNB_NGAP.c.
- Implement a ceiling of 4095 to comply with the 12-bit protocol limit.

Ref: 3GPP TS 38.413 Section 9.3.1.97

Merge remote-tracking branch 'origin/fix-usage-iq_rxrescale-iq_txshift' into integration_2026_w02 (!3832)

Remove global iq_txshift and iq_rxrescale

iq_txshift and iq_rxrescale are defined but not used, this commit fixes it

Minor CI and nr_ulsim reporting adjustments

Remove unused cmake_targets files

See individual commits

fix(documentation): issue 1042

A merge conflict header was left by mistake in
openair1/PHY/CODING/DOC/LDPCImplementation.md

Closes #1042

Refactor key derivation logic to properly handle Next Hop (NH) chain
synchronization according to 3GPP TS 33.501 specifications for both RRC
Reestablishment and Master Key Update procedures.

Changes in rrc_gNB.c:
- Clarify key derivation in rrc_gNB_generate_RRCReestablishment by explicitly
  selecting base key (NH or KgNB) based on nh_ncc value
- Add comment explaining vertical vs horizontal derivation logic

Changes in rrc_UE.c:
Refactored the NH chain synchronization and key derivation code to match
TS 33.501 terminology:
- nr_sync_nh_chain(): Common helper to synchronize NH parameter chain per
  TS 33.501 Annex A.10, supporting both Master Key Update and RRC Reestablishment
  procedures
- nr_derive_kgnb_horizontal(): Derive KNG-RAN* from current KgNB when NCC values
  match (horizontal derivation per TS 33.501 A.11/A.12)
- nr_derive_kgnb_vertical(): Derive KNG-RAN* from synchronized NH after NH chain
  sync (vertical derivation per TS 33.501 A.11/A.12)
- nr_update_kgnb_from_ncc(): Unified function implementing TS 33.501 6.9.2.3.4
  logic for updating KgNB based on received nextHopChainingCount
- Refactor as_security_key_update(): Use new nr_update_kgnb_from_ncc() helper
  function for cleaner, more maintainable code
- Fix nr_rrc_ue_process_rrcReestablishment(): Properly handle received
  nextHopChainingCount and update KgNB using unified helper function
- Replaced the previous nr_rrc_nh_update() helper with these functions to
  improve clarity and alignment with the specification.
- Add debug logging for key derivation process

Key NAS deriver utils:
- update derive_kgnb documentation and protect input keys with const attribute

Closes #857

CI: Remove redundant Jenkinsfiles

All the removed files can be replaced by Jenkinsfile introduced in !3738

move NTN UE L1 functions to a new file

Moved from nr-ue not to overload that file with functions of a specific mode

Fix missing return statements in SIB1 TDA validation

Provides fix to commit d7cc1c2c in MR !3641 (merged).

Correctly include cblas include directories for RHEL

A merge conflict header was left by mistake in
`openair1/PHY/CODING/DOC/LDPCImplementation.md`

improve comments in usrp_lib.cpp