ue txData more contextual, but still global as it is entangled with usrp driver
- txData buffer is global and entangled even in usrp oai driver because of tx
thread feature
- it also makes weird combination with continuous tx usrp bug workaround
- this MR makes most of the calls contextual but keep the globakl txData
- later a MR should remove the global and tackle it with proper context, but we
need to modify gNb, UE, 4G and probably all oai drivers
Polar: remove dead code and a wrong comment
a file code duplicated and no more used a comment is wrong:
uint16_t x = INFINITY; is wrong, the gcc comment is true
uint16_t x= INFINITY; sets x=-32768 because it is truncature of 0x7FFFFF
add SIMD for the top lines when i run polartest
Improve radio for Metanoia RU (and likely others)
We introduced a regression that lowered the achievable DL throughput
with at least the Metanoia RU (i.e., in the configuration and the UE
that we use). git bisect showed up one commit, which does not seem
necessary. We just revert this commit, as it improves the throughput and
does not seem to have a negative impact on performance.
Further, increase RLC buffers a bit. Limit 7.2 pipeline number of layers
to 2.
fix NTN LEO scenario
NR UE: in nr_slot_fep() perform FO compensation in local tmp_dft_in
array instead of global rxdata array.
This avoids problems if nr_slot_fep() is called more than once for an
OFDM symbol.
Correct block_length to Kprime for LDPC decoder
When compile the OAI by CMake, it shows the following error:
../openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_decoder_CL.c:353:40: error: no member named 'block_length' in 'struct nrLDPC_dec_params'
int block_length = p_decParams->block_length;
NR UE: consider the ratio of PUSCH EPRE to DMRS EPRE when calculating PUSCH
DMRS power scaling
When calculating DMRS scaling ratio, we should consider PUSCH EPRE to DMRS
EPRE according to TS 38.214 Table 6.2.2-1.
Close#929
NR UE: add support for continuous frequency offset compensation (in particular NTN LEO Doppler)
- move function add_noise() to file
openair1/SIMULATION/TOOLS/phase_noise.c
- refactor (co)sinus calculation out of phase_noise() into get_sin_cos()
in nr_common.c
- NR UE: continuously estimate the frequency offset using PBCH DMRS
- NR UE: add command line parameter --initial-fo to specify known
initial frequency offset
- NR UE: add support for continuous DL frequency offset compensation
--cont-fo-comp
- NR UE: add support for continuous UL frequency offset
pre-compensation. Depending on the main source of frequency offset,
pre-compensate the UL frequency offset (FO) accordingly. Therefore
modify the flag --cont-fo-comp to accept an integer value, where
* 1 specifies, that the main FO contribution comes from the accuracy of the local oscillator (LO)
* 2 specifies, that the main FO contribution comes from Doppler shift
- NR UE: add PI controller to continuous frequency offset compensation
- rfsimulator: enable and correct NTN LEO doppler simulation
- use SIMD to speed up nr_fo_compensation()
- Extend NTN LEO example in RUNMODEM.md to include continuous Doppler
compensation
- NR UE: in nr_adjust_synch_ue() extend the peak search to +/- cyclic
prefix size, esp. for LEO NTN scenarios the timing drifts during
initial sync, which is mostly compensated with
--ntn-initial-time-drift. But there might be a residual time offset,
and by extending the peak search window we make this more tolerant.
- NR UE: remove unused nr_slot_tx_offset, it is unused since commit
f3e60a14
- NR UE: remove now unnecessary local variable
update_ntn_system_information, directly use
UE->ntn_config_message->update instead
NR UE: enable concurrent UL slot processing
This commit introduces support for concurrent UL slot processing
Key changes:
- Increased number of UL actors from 1 to 2
- fix several issues related to writing to global variables inside processSlotTX
- Ensure in-order execution of if_module calls by utilizing the preexisting dynamic_barrier structure.
Note: for NTN, concurrent UL slot processing does not work. A flag
`--num-ul-actors X` has been introduced that allows to fix the number of
UL actors to `X` (default is 2).
esp. for LEO NTN scenarios the timing drifts during initial sync, which is mostly compensated with --ntn-initial-time-drift.
But there might be a residual time offset, and by extending the peak search window we make this more tolerant.
This commit introduces support for concurrent UL slot processing
Key changes:
- Increased number of UL actors from 1 to 2
- fix several issues related to writing to global variables inside
processSlotTX
- Ensure in-order execution of if_module calls by utilizing the
preexisting dynamic_barrier structure.
Optimization for unused symbols in NR UE
After processing TX frequency domain data skip IFFT call for symbols
that aren't used, the time domain buffer is memset instead.
Biggest benefit is when UE does not transmit PUSCH, or PUSCH is using <
14 symbols
feat(oran_fhlib_5g): O-RAN 7.2 FrontHaul Interface on Arm
This MR is enabling the 7.2 FHI on Arm systems.
Even though the performance are yet very bad (UE connection is very
difficult, 100Mbps DL, almost no UL), still I would like to merge this
now since the matter of making the FHI work is rather orthogonal to the
performance issues.
So merging this feature would provide a reliable settlement on top of
which we could then progressively enhance the porting of OAI to Arm.
Especially that would make our work easier by having less features to
rebase regularly on develop.
The main features this MR is made of are:
1. Make the xran patches dual
We provide patches for both E and F releases of xran that handles x86
targets as well as Arm targets. Both patches have been tested on both
types of machines (armix, broadbill). Thanks to @brobert and @changy
for their work on xran.
2. Perform 9-bits BFP compression with ArmRAL
Since the BFP compression implementation provided with xran does rely
heavily on AVX512, we provide an alternative implementation that is
relying on Arm's RAN Acceleration Library (ArmRAL).
As of writing this commit description, only 9-bits compression is
supported. Other IQ width will be added.
This upcoming change does not prevent review to be performed since the
BFP compression functions of ArmRAL are identical except for the IQ
width. Adding further IQ width is therefore very straightforward.
3. Fixes in oran_fhlib_5g to support Arm
The library oran_fhlib_5g needed few changes to successfully compile and
run on Arm systems. Thanks to @brobert for his work on oran_fhlib_5g.
Jaroslava Fiedlerova