2.Added Precoding function for IF4P5
Signed-off-by: rajeshwari.p <rajeshwari.p@vvdntech.com>

2. Added support to read XRAN_LIB_DIR from env variable
3. Changes to check RTE_SDK and RTE_TARGET env variable if tp is oran_fhlib_5g
Signed-off-by: rajeshwari.p <rajeshwari.p@vvdntech.com>

Signed-off-by: rajeshwari.p <rajeshwari.p@vvdntech.in>

Signed-off-by: rajeshwari.p <rajeshwari.p@vvdntech.in>

Signed-off-by: thamizhselvan.k <thamizhselvan.k@vvdntech.in>

Signed-off-by: thamizhselvan.k <thamizhselvan.k@vvdntech.in>

Signed-off-by: thamizhselvan.k <thamizhselvan.k@vvdntech.in>

tx/rx memcpy between xran and oai buffers
- Updated the byte order in tx/rx emcpy between xran and oai buffers
Signed-off-by: thamizhselvan.k <thamizhselvan.k@vvdntech.in>

Signed-off-by: thamizhselvan.k <thamizhselvan.k@vvdntech.in>

- declared sl_ahead to avoid runtime time error
Signed-off-by: thamizhselvan.k <thamizhselvan.k@vvdntech.in>

Resolved incorrect ssb start symbol number issue,  when more than one ssb enabled (ssb_PositionsInBurst_Bitmap > 1)
Signed-off-by: rajeshwari.p <rajeshwari.p@vvdntech.in>

Signed-off-by: rajeshwari.p <rajeshwari.p@vvdntech.in>

Signed-off-by: rajeshwari.p <rajeshwari.p@vvdntech.in>

Modiefied CMakeLists, Compilation Warning solved, No more modification of CMakeCache required. New Instructions to build

Standalone DU simulator integrated to demonstrate the xRAN lib working with OAI. Same IQ samples of sample app are loaded from file and copied in xRAN buffer. Tested with sample app RU

integration_2022_wk49

See merge request oai/openairinterface5g!1851

!1714 first-fix-rrc-mac-interface
!1755 DL/UL channel estimation improvement
!1788 NR RRC harmonization of CSI reporting
!1848 Remove old RNTI at MAC layer when Msg3 RRCSetupRequest carries ng-5G-S-TMSI-Part1
deactivate SRS in SA tests: creates RT problems
!1809 Doppler Effect
!1831 Nr ue fix asn1 memleak
!1842 Parallelize ASN.1 generation and build
!1853 Correct ue_ip driver module for RHEL9
!1850 Fix T1 offload test
!1461 Optimize LTE TM2 modulation (doesn't work well but it is already the case)
!1806 Repair doxygen documentation generation
!1856 hotfix for nr_rrc_data_req for the unfortunate SDU size 255

the SDU has this size the function will return. This is an old piece of
code where 255 meant -1 which was what was returned from the asn1c
encoding function if the ASN.1 message was not encodable.