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AR# 40276

LogiCORE IP Digital Pre-Distortion (DPD) v4.0 - How do I set the configuration parameters for the multiple set mode as described in DS811?


How do I set the configuration parameters for the multiple set mode as described in the LogiCORE IP Digital Pre-distortion (DPD) v4.0 Data Sheet (DS811)?


The performance of the DCL can be tuned using four parameters. The DCLPSTEP[128], DCLSET1RATIO[129], and DCLSET2RATIO[130] are set using the SET_DCL_PARAMETERS{12} control, and the METERLENGTH[31] which is set using the SET_METER_LENGTH{6} control.

The meter length is used to set the interval over which the power is measured and is the update period for coefficient set selection when NSNL amplifiers are used.

The DCLSET1RATIO[129] and DCLSET2RATIO[130] are used to set the thresholds that determine which coefficient set should be used. These thresholds are set relative to the maximum power that is to be transmitted.

The DCLPSTEP[28] is used to set a decay rate for the three thresholds which ensures analog gain tracking.

For more details on setting the P_step parameter, refer to XAPP1128C Application Note.

For a detailed list of Digital Pre-Distortion (DPD) Release Notes and Known Issues, see (Xilinx Answer 33521).
AR# 40276
Date Created 01/26/2011
Last Updated 01/26/2011
Status Active
Type General Article
  • Digital PreDistortion(DPD)