Title:
AMPLITUDE/PHASE CONTROL DEVICE, AMPLITUDE/PHASE CONTROL METHOD, AMPLIFICATION DEVICE, AND RADIO TRANSMITTER
Document Type and Number:
WIPO Patent Application WO/2021/192204
Kind Code:
A1
Abstract:
An amplitude/phase control device (10) is configured to comprise: a signal splitting unit (12) that splits a transmission signal into a first signal and a second signal and that outputs each of the first signal and the second signal to a Doherty amplifier (14); an error calculating unit (16) that acquires from the Doherty amplifier (14) a combined signal of the first signal as amplified by the Doherty amplifier (14) and of the second signal as amplified by the Doherty amplifier (14), multiplies the combined signal by the reciprocal of the gain of the Doherty amplifier (14), and that calculates the error between the combined signal as multiplied by the reciprocal and the transmission signal; and a control unit (17) that controls, in accordance with the error calculated by the error calculating unit (16), the amplitude in each of the first signal and the second signal outputted from the signal splitting unit (12) and that controls, in accordance with the error, the phase difference between the first signal outputted from the signal splitting unit (12) and the second signal outputted from the signal splitting unit (12).
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Inventors:
YAMASHITA AO (JP)
SAKAKI HIROTO (JP)
ANDO NOBUHIKO (JP)
NAKAMIZO HIDEYUKI (JP)
SAKAKI HIROTO (JP)
ANDO NOBUHIKO (JP)
NAKAMIZO HIDEYUKI (JP)
Application Number:
PCT/JP2020/013927
Publication Date:
September 30, 2021
Filing Date:
March 27, 2020
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03F1/02; H03F1/07; H03F1/32; H03F3/68
Domestic Patent References:
| WO2018173407A1 | 2018-09-27 | |||
| WO2004034574A1 | 2004-04-22 |
Foreign References:
| JP2017005478A | 2017-01-05 | |||
| JP2019201361A | 2019-11-21 | |||
| JP2015026968A | 2015-02-05 | |||
| JP2008131186A | 2008-06-05 |
Other References:
LEI DINGG. TONG ZHOUDENNIS R. MORGANZHENGXIAND MAJ. STEVENSON KENNEYJAEHYEONG, KIMCHARLES R. GIARDINA: "A robust digital baseband predistorter constructed using memory polynomial", IEEE TRANSACTIONS ON COMMUNICATIONS, vol. 52, no. 1, January 2004 (2004-01-01)
See also references of EP 4113830A4
See also references of EP 4113830A4
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
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