Analog Devices ADRV9002

Preliminary Technical Data UG-1828
Rev. PrB | Page 185 of 277
Table 80. DPD Post Initial Calibration Parameters
Parameter Type Description Min Max Default Note
numberOfSamples uint32_t
Specifies the number of
samples to use for each
iteration of DPD
computation.
1024 4096 4096
The maximum
value is preferred.
outlierRemovalEnable
uint8_t
(bool)
Enables an algorithm for
removing captured data that
may render DPD
computation unstable.
FALSE
Currently not
supported, so
user should set
“FALSE”.
outlierRemovalThreshold
uint32_t
(U2.30)
If the above parameter is
enabled, defines a threshold
for removing captured data
that may render DPD
computation unstable.
0
Currently not
used since outlier
removal
algorithm is not
supported.
additionalPowerScale uint32_t
Provides an estimate of the
standard deviation of the
modem input data
magnitude to scale the data
for internal DPD
computation.
0 2
32-1
4
rxTxNormalizationLowerThreshold
uint32_t
(U2.30)
Signal power for the lower
threshold for the
normalization of the
magnitude and phase of the
RX and TX data
0 1.0
0.0031622776602
(−25 dBFS)
rxTxNormalizationUpperThreshold
uint32_t
(U2.30)
Signal power for the upper
threshold for the
normalization of the
magnitude and phase of the
RX and TX data
0 1.0
0.031622776602 (-
15 dBFS)
immediateLutSwitching bool
Determines whether the LUT
switches immediately or at
the end of Tx data frame.
TRUE
FALSE not
currently
supported.
useSpecialFrame bool
DPD only runs on a user
indicated special frame.
FALSE
Currently not
supported.
resetLuts bool
Reset LUTs so that no pre-
distortion is applied.
FALSE
User should reset
LUTs at the start
of DPD operation.
Each of these parameters are described in more details as the following:
numberOfSamples
It specifies the number of samples used per DPD data capture with a limit of 4096. In general, the DPD performance could be improved
if more samples are used. For TETRA1, currently, the Linearization Channel (LCH) is not supported so the numberOfSamples should be
set to 4096. When LCH is supported, the numberOfSamples could be changed to a different value. More information will be provided in
the future.
For LTE, the Number of Sample should be set to 4096 without frequency hopping.
outlierRemovalEnable
This feature removes anomalous captured data before DPD computation. Currently it is not implemented and should be disabled.
outlierRemovalThreshold
Since outlier removal is not implemented, this threshold is ignored.
additionalPowerScale