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公开(公告)号：US20250088345A1
公开(公告)日：2025-03-13
申请号：US18392416
申请日：2023-12-21
Applicant: Silicon Laboratories Inc.
Inventor： Xushuai Qu , Guner Arslan
Abstract: A wireless communications device includes a receiver having a phase detector configured to extract frequency offset and provide a corresponding error signal generated based on a baseband version of a received radio frequency signal and an expected transmitted data signal. The receiver has a phase-locked loop configured to generate an error correction signal based on a phase of the error signal and a predicted instantaneous phase of the error signal. The receiver has a correction circuit configured to provide a corrected baseband version of the received radio frequency signal based on the baseband version of the received radio frequency signal and the error correction signal. The receiver may have a re-encoding-based processing circuit configured to provide the expected transmitted data signal based on a preliminarily decoded symbol.
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公开(公告)号：US20250088901A1
公开(公告)日：2025-03-13
申请号：US18243222
申请日：2023-09-07
Applicant: Silicon Laboratories Inc.
Inventor： Xushuai Qu , Guner Arslan , Robert Gorday , Yan Zhou , Yi Shen Yeh
Abstract: A technique for reducing or eliminating effects of frequency and phase offset in a communications system includes implementing a demodulator having a Kalman filter based phase-locked loop for phase-shift keying or quadrature amplitude modulated signals. In an acquisition mode of operation, the Kalman filter based phase-locked loop continuously updates an error correction signal until an error between a received version of a predetermined signal transmitted using phase-shift keying or quadrature amplitude modulation and the predetermined signal is at or near zero. In a tracking mode of operation, the Kalman filter based phase-locked loop adjusts the error correction signal to maintain the error between the received signal and a predicted signal at or near zero.
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