公开(公告)号：US11711102B2

公开(公告)日：2023-07-25

申请号：US17453144

申请日：2021-11-01

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Moh Lim Sim ,  Chow Loong Cheah ,  Jesus F. Corretjer ,  Kevin Doberstein ,  Boon Heng Fong ,  Ariel L. Galan

IPC: H04B1/10 ,  H04B1/403 ,  H03D3/00

CPC classification number: H04B1/1027 ,  H03D3/002 ,  H04B1/406 ,  H03D2200/0088

Abstract: A very low intermediate frequency receiver and methods for controlling the same. One method includes providing, using a local oscillator, a first intermediate frequency, detecting, using an interferer detector, an adjacent or alternate channel interference signal and an image of the adjacent or adjacent channel interference signal causing interference with a desired signal, and determining, using an electronic processor, whether the desired signal is an analog signal. In response to determining that the desired signal is an analog signal, the method includes controlling, using the electronic processor, the local oscillator to provide a second intermediate frequency. In response to determining that the desired signal is not an analog signal, the method includes determining, using the electronic processor, a switching condition based on the desired signal, and controlling, using the electronic processor, the local oscillator to provide the second intermediate frequency in response to determining the switching condition.

公开(公告)号：US20230132055A1

公开(公告)日：2023-04-27

申请号：US17452372

申请日：2021-10-26

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Moh Lim Sim ,  Boon Heng Fong ,  Ariel L. Galan ,  Ondy Dharma Indra

IPC: H04B17/327 ,  H04B17/345 ,  H04B17/13

Abstract: One example communication device receives a radio frequency (RF) signal. The communication device may include a radio frequency integrated circuit (RFIC) that includes an internal attenuator. The RFIC and other processing circuitry may convert the received RF signal to a baseband frequency to generate a processed complex baseband signal. A digital signal processor of the communication device may determine, based on detection of or lack of detection of distortion terms in a frequency spectrum of the processed complex baseband signal at frequencies corresponding to integer multiples of a symbol rate of a linear modulation interferer, a modulation type of an interferer signal that forms at least part of the processed complex baseband signal. The digital signal processor may also control whether the internal attenuator is enabled based on a received signal strength indication (RSSI) of a desired RF signal and the modulation type of the interferer signal.

公开(公告)号：US20230140647A1

公开(公告)日：2023-05-04

申请号：US17453144

申请日：2021-11-01

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Moh Lim Sim ,  Chow Loong Cheah ,  Jesus F. Corretjer ,  Kevin Doberstein ,  Boon Heng Fong ,  Ariel L. Galan

IPC: H04B1/10 ,  H03D3/00 ,  H04B1/403

Abstract: A very low intermediate frequency receiver and methods for controlling the same. One method includes providing, using a local oscillator, a first intermediate frequency, detecting, using an interferer detector, an adjacent or alternate channel interference signal and an image of the adjacent or adjacent channel interference signal causing interference with a desired signal, and determining, using an electronic processor, whether the desired signal is an analog signal. In response to determining that the desired signal is an analog signal, the method includes controlling, using the electronic processor, the local oscillator to provide a second intermediate frequency. In response to determining that the desired signal is not an analog signal, the method includes determining, using the electronic processor, a switching condition based on the desired signal, and controlling, using the electronic processor, the local oscillator to provide the second intermediate frequency in response to determining the switching condition.

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.

公开(公告)号：US11716159B2

公开(公告)日：2023-08-01

申请号：US17452372

申请日：2021-10-26

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Moh Lim Sim ,  Boon Heng Fong ,  Ariel L. Galan ,  Ondy Dharma Indra

IPC: H04B17/327 ,  H04B17/13 ,  H04B17/345

CPC classification number: H04B17/327 ,  H04B17/13 ,  H04B17/345

Abstract: One example communication device receives a radio frequency (RF) signal. The communication device may include a radio frequency integrated circuit (RFIC) that includes an internal attenuator. The RFIC and other processing circuitry may convert the received RF signal to a baseband frequency to generate a processed complex baseband signal. A digital signal processor of the communication device may determine, based on detection of or lack of detection of distortion terms in a frequency spectrum of the processed complex baseband signal at frequencies corresponding to integer multiples of a symbol rate of a linear modulation interferer, a modulation type of an interferer signal that forms at least part of the processed complex baseband signal. The digital signal processor may also control whether the internal attenuator is enabled based on a received signal strength indication (RSSI) of a desired RF signal and the modulation type of the interferer signal.