公开(公告)号：US20230336201A1

公开(公告)日：2023-10-19

申请号：US18299512

申请日：2023-04-12

Applicant: MEDIATEK INC.

Inventor： Shao-Chou HUNG ,  Bao-Chi PENG ,  Chun-Chia CHEN ,  I-Kang FU ,  Abdelkader MEDLES ,  Gilles CHARBIT

IPC: H04B1/16

CPC classification number: H04B1/1638

Abstract: Aspects of the disclosure provide an apparatus for receiving a circularly polarized signal by linearly polarized antennas. A horizontally polarized antenna and a vertically polarized antenna of the apparatus receive a circularly polarized signal that is transmitted based on a transmitted baseband signal vector. A radio frequency (RF) module of the apparatus generates a first baseband signal vector based on the received circularly polarized signal. The first baseband signal vector includes a product of the transmitted baseband signal vector and a receiving polarization vector of the transmitted baseband signal vector. Processing circuitry of the apparatus estimates the receiving polarization vector of the transmitted baseband signal vector based on the first baseband signal vector. The processing circuitry derives a second baseband signal vector based on the estimated receiving polarization vector and the first baseband signal vector.

公开(公告)号：US20230335913A1

公开(公告)日：2023-10-19

申请号：US18299115

申请日：2023-04-12

Applicant: MEDIATEK INC.

Inventor： Bao-Chi PENG ,  Shao-Chou HUNG ,  Chun-Chia CHEN ,  I-Kang FU ,  Abdelkader MEDLES ,  Gilles CHARBIT

IPC: H01Q15/24 ,  H01Q3/24

CPC classification number: H01Q15/244 ,  H01Q3/24

Abstract: Aspects of the disclosure provide an apparatus for transmitting a circularly polarized signal by linearly polarized antennas. Processing circuitry of the apparatus generates a transmitted baseband signal vector. Based on the transmitted baseband signal vector, power amplifiers (PAs) of the apparatus generates transmitted radio frequency (RF) signals. The transmitted RF signals are received by receiving circuitry of the apparatus to obtain a received baseband signal vector. A controller of the apparatus calibrates the PAs and local oscillator (LO) signals of frequency converters of the apparatus based on the received baseband signal vector. A horizontally polarized antenna and a vertically polarized antenna of the apparatus transmit a circularly polarized signal based on the calibrated PAs and the calibrated LO signals.

公开(公告)号：US20230335914A1

公开(公告)日：2023-10-19

申请号：US18299162

申请日：2023-04-12

Applicant: MEDIATEK INC.

Inventor： Shao-Chou HUNG ,  Bao-Chi PENG ,  Chun-Chia CHEN ,  I-Kang FU ,  Abdelkader MEDLES ,  Gilles CHARBIT

IPC: H01Q15/24

CPC classification number: H01Q15/246 ,  H01Q15/244

Abstract: Provided is an apparatus for transmitting a circularly polarized signal by linearly polarized antennas. A horizontally polarized antenna and a vertically polarized antenna of the apparatus receives a first circularly polarized signal transmitted based on a transmitted baseband signal vector. Based on the first circularly polarized signal, a radio frequency (RF) module of the apparatus generates a received baseband signal vector including a product of the transmitted baseband signal vector and a receiving polarization vector of the transmitted baseband signal vector. Processing circuitry of the apparatus estimates the receiving polarization vector based on the received baseband signal vector and calibrates power amplifiers (PAs) and local oscillator (LO) signals of frequency converters in the RF module based on the estimated receiving polarization vector. The horizontally and vertically polarized antennas transmit a second circularly polarized signal based on the calibrated PAs and the calibrated LO signals of the frequency converters.