公开(公告)号：US12096191B2

公开(公告)日：2024-09-17

申请号：US17487210

申请日：2021-09-28

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Moh Lim Sim ,  Mohammad Athari Ismail ,  Yew Foong Lim ,  Chian Hong Wong ,  Boon Heng Fong

IPC: H04R3/04 ,  G10L25/03

CPC classification number: H04R3/04 ,  G10L25/03

Abstract: A device and method for correcting in-phase and quadrature phase (IQ) baseband components to drive a speaker is provided. The device: controls a local oscillator of an RF downmixing device to a plurality of baseband frequency offsets over a range that includes a given baseband frequency offset; determines, at the plurality of baseband frequency offsets, for a received RF signal, amplitude ratio error and phase error for respective IQ baseband components of the received RF signal; generates, using the amplitude ratio error and the phase error for the respective IQ baseband components, for the given offset, filter coefficients for a given baseband frequency range which compensates for respective amplitude ratio error and respective phase error for the given baseband frequency range; and filters, with the filter coefficients, IQ baseband components of the received RF signal, with the local oscillator operating at the given offset, to generate corrected IQ baseband components.