Airoha Technology Corporation

Jeng-Hong Chen

Yun-Xuan Zhang

Chun-Yuan Huang

Chin-Chang Chang

A wireless communication device includes a receiver circuit, a phase shift control circuit, and a digital phase-locked loop (DPLL) circuit. The receiver circuit includes a down-converter circuit that is used to apply down-conversion to an input signal according to a local oscillator (LO) signal. The phase shift control circuit is used to generate a phase shift signal. The DPLL circuit is used to generate the LO signal locked to an initial frequency under a frequency-lock state. In response to the phase shift signal, the DPLL circuit is further used to make the LO signal have a different frequency without leaving the frequency-lock state.

Method and apparatus for applying phase shift to digital phase-locked loop circuit to adjust frequency of local oscillator signal used by down-conversion

A frequency offset (FO) estimation method includes: sampling a frequency-modulated repetition-coded segment of a packet to generate a plurality of samples; obtaining a frequency deviation (FD) value for each of a plurality of target samples selected from the plurality of samples; and estimating an FO value through accumulating complete FD values of the plurality of target samples.

Method and apparatus for estimating frequency offset through accumulating complete frequency deviation values of samples obtained from sampling frequency-modulated repetition-coded segment of packet

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Manhattan Beach, CA, United States of America

Jeng-Hong Chen