CSI-RS timing configurations

This notebook shows the Time-domain properties of CSI-RS configuration (Period, offset, etc.)

import numpy as np
import scipy.io

from neoradium import Carrier, PDSCH, Grid, CsiRsConfig, CsiRsSet

carrier = Carrier(startRb=0, numRbs=24, spacing=15)
bwp = carrier.bwps[0]
bwp.print()

Bandwidth Part Properties:
  Resource Blocks:    24 RBs starting at 0 (288 subcarriers)
  Subcarrier Spacing: 15 KHz
  CP Type:            normal
  bandwidth:          4.32 MHz
  symbolsPerSlot:     14
  slotsPerSubFrame:   1
  nFFT:               2048
  frameNo:            0
  slotNo:             0

# Using 3rd row of 38.211 Table 7.4.1.5.3-1
# Default setting is 'Periodic' resource type, with Period=4 and offset=0 => Slots 0, 4, ... will contain CSI-RS
csiRsConfig = CsiRsConfig([CsiRsSet("NZP", bwp, symbols=[3], numPorts=2)])
csiRsConfig.print()

carrier.slotNo = 0
for slot in range(5):
    grid = bwp.createGrid(csiRsConfig.numPorts)
    csiRsConfig.populateGrid(grid)
    # Only drawing the first port:
    grid.drawMap(ports=[0], reRange=(0,36), title="Slot Map for slot %d"%(carrier.slotNo))
    carrier.slotNo += 1

CSI-RS Configuration: (1 Resource Sets)
  CSI-RS Resource Set:(1 NZP Resources)
    Resource Set ID:      0
    Resource Type:        periodic
    Resource Blocks:      24 RBs starting at 0
    Slot Period:          4
    Bandwidth Part:
      Resource Blocks:    24 RBs starting at 0 (288 subcarriers)
      Subcarrier Spacing: 15 KHz
      CP Type:            normal
      bandwidth:          4.32 MHz
      symbolsPerSlot:     14
      slotsPerSubFrame:   1
      nFFT:               2048
      frameNo:            0
      slotNo:             0
    CSI-RS:
      resourceId:         0
      numPorts:           2
      cdmSize:            2 (fd-CDM2)
      density:            1
      RE Indexes:         6
      Symbol Indexes:     3
      Table Row:          3
      Slot Offset:        0
      Power:              0 db
      scramblingID:       0

# Using 3rd row of 38.211 Table 7.4.1.5.3-1
# same as before but setting the offset to 1 => Slots 1, 5, ... will contain CSI-RS
csiRsConfig = CsiRsConfig([CsiRsSet("NZP", bwp, symbols=[3], numPorts=2, offset=1)])
csiRsConfig.print()

carrier.slotNo = 0
for slot in range(6):
    grid = bwp.createGrid(csiRsConfig.numPorts)
    csiRsConfig.populateGrid(grid)
    # Only drawing the first port
    grid.drawMap(ports=[0], reRange=(0,36), title="Slot Map for slot %d"%(carrier.slotNo))
    carrier.slotNo += 1

CSI-RS Configuration: (1 Resource Sets)
  CSI-RS Resource Set:(1 NZP Resources)
    Resource Set ID:      0
    Resource Type:        periodic
    Resource Blocks:      24 RBs starting at 0
    Slot Period:          4
    Bandwidth Part:
      Resource Blocks:    24 RBs starting at 0 (288 subcarriers)
      Subcarrier Spacing: 15 KHz
      CP Type:            normal
      bandwidth:          4.32 MHz
      symbolsPerSlot:     14
      slotsPerSubFrame:   1
      nFFT:               2048
      frameNo:            0
      slotNo:             5
    CSI-RS:
      resourceId:         0
      numPorts:           2
      cdmSize:            2 (fd-CDM2)
      density:            1
      RE Indexes:         6
      Symbol Indexes:     3
      Table Row:          3
      Slot Offset:        1
      Power:              0 db
      scramblingID:       0

# Using 3rd row of 38.211 Table 7.4.1.5.3-1
# Using period=5 and offset=2 => Slots 2, 7, ... will contain CSI-RS
csiRsConfig = CsiRsConfig([CsiRsSet("NZP", bwp, symbols=[3], numPorts=2, period=5, offset=2)])
csiRsConfig.print()

carrier.slotNo = 0
for slot in range(8):
    grid = bwp.createGrid(csiRsConfig.numPorts)
    csiRsConfig.populateGrid(grid)
    # Only drawing the first port
    grid.drawMap(ports=[0], reRange=(0,36), title="Slot Map for slot %d"%(carrier.slotNo))
    carrier.slotNo += 1

CSI-RS Configuration: (1 Resource Sets)
  CSI-RS Resource Set:(1 NZP Resources)
    Resource Set ID:      0
    Resource Type:        periodic
    Resource Blocks:      24 RBs starting at 0
    Slot Period:          5
    Bandwidth Part:
      Resource Blocks:    24 RBs starting at 0 (288 subcarriers)
      Subcarrier Spacing: 15 KHz
      CP Type:            normal
      bandwidth:          4.32 MHz
      symbolsPerSlot:     14
      slotsPerSubFrame:   1
      nFFT:               2048
      frameNo:            0
      slotNo:             6
    CSI-RS:
      resourceId:         0
      numPorts:           2
      cdmSize:            2 (fd-CDM2)
      density:            1
      RE Indexes:         6
      Symbol Indexes:     3
      Table Row:          3
      Slot Offset:        2
      Power:              0 db
      scramblingID:       0