TY - JOUR
T1 - Envelope Tracking Power Amplifier Using Short-Time Fourier Transform
AU - Alon, M.
AU - Shor, Y.
AU - Moshkin, A.
AU - Dagan, T.
AU - Singer, S.
N1 - Publisher Copyright:
© 2001-2012 IEEE.
PY - 2021/6
Y1 - 2021/6
N2 - A new power amplifier (PA) efficiency enhancement technique using short-time Fourier transform (STFT) in envelope tracking (ET) topology is introduced. The proposed technique produced a time-frequency matrix that illustrated the signal spectrum at each time frame. The applied filter was made time variant by setting a threshold for the preserved power percentage at each time frame. The technique gave full control over the tradeoff between bandwidth (BW) reduction and power consumption efficiency and provided a significant BW reduction over pure ET. The proposed method was demonstrated on a 37 dBm, 40-MHz long-term evolution signal at 2.4 GHz, using 65 W 3-dB compression-point GaN PA. The resulting efficiencies were 38.6% [16-quadrature amplitude modulation (QAM)] and 41.9% (64-QAM).
AB - A new power amplifier (PA) efficiency enhancement technique using short-time Fourier transform (STFT) in envelope tracking (ET) topology is introduced. The proposed technique produced a time-frequency matrix that illustrated the signal spectrum at each time frame. The applied filter was made time variant by setting a threshold for the preserved power percentage at each time frame. The technique gave full control over the tradeoff between bandwidth (BW) reduction and power consumption efficiency and provided a significant BW reduction over pure ET. The proposed method was demonstrated on a 37 dBm, 40-MHz long-term evolution signal at 2.4 GHz, using 65 W 3-dB compression-point GaN PA. The resulting efficiencies were 38.6% [16-quadrature amplitude modulation (QAM)] and 41.9% (64-QAM).
KW - Bandwidth (BW) reduction
KW - envelope tracking (ET)
KW - power amplifier (PA)
KW - short-time Fourier transform (STFT)
UR - http://www.scopus.com/inward/record.url?scp=85103264104&partnerID=8YFLogxK
U2 - 10.1109/LMWC.2021.3067268
DO - 10.1109/LMWC.2021.3067268
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AN - SCOPUS:85103264104
SN - 1531-1309
VL - 31
SP - 575
EP - 578
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
IS - 6
M1 - 9381274
ER -