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A memcpy() introduced to optimize for the case of no precoding corrupted RBs which are not allocated to PDSCH in the common txdataF array.
So instead fall back to memcpy() for each PDSCH RB.

knopp authored Jan 06, 2021 and Robert Schmidt committed Feb 07, 2021

made L1 DLSCH encoding stateless. harq_pid/round information are not kept in PHY. Full channel encoding is performed for each transmission of a transport block.
Still to be done: test, then cleanup data structures and fix unitary simulations.

- updated return function value to -1
- removed static variable for dmrs symbol selection for channel
- Updated sin cos quadrant check conditions
- removed casting from PTRS slope and related calculations

- fixed channel compensation by choosing most recent DMRS symbol ina
  slot
- Removed code to find nearest DMRS symbol for channle compensation
- Updated TBS calculation in DLSIM
- Added debug prints in PTRS CPE estimation for DMRS symbol

- Based upon ptrs bitmap, ptrs symbols are added in DL
- Mac ptrs validation condition is updated

This commit contains work done by Eurecom and by Benetel.