TY - GEN
T1 - An FIR memory polynomial predistorter for wideband RF power amplifiers
AU - Manyam, Venkata Narasimha
AU - Pham, Dang Kien Germain
AU - Jabbour, Chadi
AU - Desgreys, Patricia
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/8/11
Y1 - 2017/8/11
N2 - A memory polynomial (MP) based digital baseband predistorter for wideband base station RF power amplifiers is presented. The conventional memory polynomial based predistorter's inability to sufficiently improve the adjacent channel leakage ratio (ACLR) for high bandwidth signals is mitigated by using a linear FIR filter. The FIR filter compensates for the linear memory distortions and is employed prior to the memory polynomial predistorter (FIR-MP). The proposed technique is validated in simulations for 20 MHz and 80 MHz signals centered at 2 GHz. The PA models for the simulation are extracted from measurements carried out on a commercial 1W GaAs HBT PA. With considerably less number of coefficients, an ACLR improvement of at least 5.2 dB and 11.1 dB over the conventional MP DPD is obtained for 20 MHz and 80 MHz signals, respectively, and hence showing suitability for the adoption into small-cell base stations.
AB - A memory polynomial (MP) based digital baseband predistorter for wideband base station RF power amplifiers is presented. The conventional memory polynomial based predistorter's inability to sufficiently improve the adjacent channel leakage ratio (ACLR) for high bandwidth signals is mitigated by using a linear FIR filter. The FIR filter compensates for the linear memory distortions and is employed prior to the memory polynomial predistorter (FIR-MP). The proposed technique is validated in simulations for 20 MHz and 80 MHz signals centered at 2 GHz. The PA models for the simulation are extracted from measurements carried out on a commercial 1W GaAs HBT PA. With considerably less number of coefficients, an ACLR improvement of at least 5.2 dB and 11.1 dB over the conventional MP DPD is obtained for 20 MHz and 80 MHz signals, respectively, and hence showing suitability for the adoption into small-cell base stations.
KW - Digital predistortion (DPD)
KW - Memory polynomial (MP)
KW - Power amplifier (PA)
KW - Small-cell base stations
KW - Wideband
UR - https://www.scopus.com/pages/publications/85034437389
U2 - 10.1109/NEWCAS.2017.8010152
DO - 10.1109/NEWCAS.2017.8010152
M3 - Conference contribution
AN - SCOPUS:85034437389
T3 - Proceedings - 2017 IEEE 15th International New Circuits and Systems Conference, NEWCAS 2017
SP - 249
EP - 252
BT - Proceedings - 2017 IEEE 15th International New Circuits and Systems Conference, NEWCAS 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 15th IEEE International New Circuits and Systems Conference, NEWCAS 2017
Y2 - 25 June 2017 through 28 June 2017
ER -