MIMO OFDM Channel Estimation

[kmlfrkbsrn]

Hello everyone,
I have seen so much SIMO LS Estimator example for OFDM channels. I need do this for MIMO channels by using Advanced Link-level Simulations example. I tried to do this in the above code, but I face errors. How to do this? I have already seen OFDM MIMO Channel Estimation and Detection side, but I am the beginner. I don't want to go details. How to do that?

NUM_BITS_PER_SYMBOL = 4 # 16-PSK
EBN0_DB_MIN = -3.0
EBN0_DB_MAX = 5.0
BATCH_SIZE = 128
CODERATE = 0.5

NUM_UT = 2
NUM_BS = 4
NUM_UT_ANT = 2
NUM_BS_ANT = 4
NUM_STREAMS_PER_TX = NUM_UT_ANT

RX_TX_ASSOCIATION = np.matrix([[1 , 1, 0, 0], [0 , 0, 1, 1] ])

STREAM_MANAGEMENT = sn.mimo.StreamManagement(RX_TX_ASSOCIATION, NUM_STREAMS_PER_TX)

RESOURCE_GRID = sn.ofdm.ResourceGrid( num_ofdm_symbols=14,
                                      fft_size=76,
                                      subcarrier_spacing=30e3,
                                      num_tx=NUM_UT,
                                      num_streams_per_tx=NUM_STREAMS_PER_TX,
                                      cyclic_prefix_length=6,
                                      pilot_pattern="kronecker",
                                      pilot_ofdm_symbol_indices=[2,11])

CARRIER_FREQUENCY = 2.6e9

UT_ARRAY = sn.channel.tr38901.Antenna(  polarization="single",
                                        polarization_type="V",
                                        antenna_pattern="38.901",
                                        carrier_frequency=CARRIER_FREQUENCY)
BS_ARRAY = sn.channel.tr38901.AntennaArray( num_rows=1,
                                            num_cols=int(NUM_BS_ANT/2),
                                            polarization="dual",
                                            polarization_type="cross",
                                            antenna_pattern="38.901", # Try 'omni'
                                            carrier_frequency=CARRIER_FREQUENCY)


DELAY_SPREAD = 100e-9
DIRECTION = "uplink"
CDL_MODEL = "C"
SPEED = 10.0

CDL = sn.channel.tr38901.CDL(CDL_MODEL,
                             DELAY_SPREAD,
                             CARRIER_FREQUENCY,
                             UT_ARRAY,
                             BS_ARRAY,
                             DIRECTION,
                             min_speed=SPEED) 

[SebastianCa]

Hi @kmlfrkbsrn,
please have a look at the MIMO OFDM tutorial or - even more advanced- the Multi-user MIMO notebook.