Added the following folder:
- ../openair1/PHY/NR_ESTIMATION/

Added the following file to CMakelists.txt:
- ../openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c

Added the following functions:
- nr_pusch_dmrs_rx
- nr_gold_pusch
- nr_ulsch_channel_level
- nr_ulsch_channel_compensation
- nr_ulsch_scale_channel is commented out (I think only used for downlink)

Changes from Khalid Ahmed Mahmoud Mohamed:
- nr_pusch_channel_estimation is used
- nr_ulsch_scale_channel is used
- nr_ulsch_channel_level is used
- nr_ulsch_channel_compensation is used
- multiple logging options for channel and signal magnitude

- removed gNB RT from "ru_procedures.c" to "nr_ru_procedures"
- added a new thread "nr_feprx_thread"
- added some functionalities for fep for rx in "nr_ru_procedures.c"

fix on dot_product64

See merge request oai/openairinterface5g!684

Resolve "LDPC Decoder Optimizations"

See merge request oai/openairinterface5g!680

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

develop-nr integration branch: 2019 week 40

The following MRs have been merged:

* MR 675 : code clean-up, remove RRC_VERSION macros and more
* MR 677 : fix for LTE X2 HO

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Merge remote-tracking branch 'origin/issue141_remove_LTE_RRC_VERSION' into develop-nr-integration-2019-w40

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

remove RRC_VERSION macros, simplify build-oai and CMakefile.txt accordingly, get rid of remaining compilation warnings (opt module improperly merged and patch asn1c files with tests against max 64 bits integer value)

nFAPI fix for L2 nFAPI simulator.

See merge request oai/openairinterface5g!670

Suggestion by Haruki NAOI.
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Integration develop nr w37

See merge request oai/openairinterface5g!668

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Conflicts:
	executables/nr-ru.c
	nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface.h

Merge remote-tracking branch 'origin/443-add-support-to-create-vcd-files-in-develop-nr' into integration_develop-nr_w37

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

fixing a bug in the allocation of the UE HARQ structures that was causing a segfault. Fixing some compiler warnings

Resolve "Problems transmitting data via NR-PDSCH"

See merge request oai/openairinterface5g!658

hotfix: replacing msg with printf in unitary simulators (msg(...) was replaced with LOG_D(PHY,...) but it was used before log was initialized)

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>