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Parallelize PUSCH channel estimation

Nada Bouknana requested to merge dmrs_channel_estimation_parallelization into develop

This MR adds PUSCH channel estimation parallelization which reduces the processing time. It also adds time measurements for each antenna and makes num_antennas_per_thread configurable in nr_ulsim and the gNB config file.

Some results:

273 PRBs 4 antennas ./nr_ulsim -n200 -m25 -s40 -S40 -q1 -R273 -r273 -z4 -P
Number of threads ULSCH channel estimation time (us) develop ULSCH channel estimation time (us) Antenna Processing time (us)
0 194.06 193.17 134.82
2 194.88 154.02 93.43
4 195.23 134.27 72.71
273 PRBs 8 antennas ./nr_ulsim -n200 -m25 -s40 -S40 -q1 -R273 -r273 -z8 -P
Number of threads ULSCH channel estimation time (us) develop ULSCH channel estimation time (us) Antenna Processing time (us)
0 387.93 384.99 269.39
2 388.10 279.47 161.32
4 387.47 225.37 106.52
8 390.53 204.48 83.74
106 PRBs MIMO 4 layers ./nr_ulsim -n100 -m9 -r106 -s10 -W4 -y4 -z4 -P
Number of threads ULSCH channel estimation time (us) develop ULSCH channel estimation time (us) Antenna Processing time (us)
0 263.20 268.97 57.49
2 263.90 252.61 51.22
4 264.17 192.49 36.29
Edited by Nada Bouknana

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