公开(公告)号：US11601156B2

公开(公告)日：2023-03-07

申请号：US17353351

申请日：2021-06-21

Applicant: MediaTek Inc.

Inventor： Yu-Hsien Chang ,  Po-Chun Huang ,  Pi-An Wu ,  Wen-Hsien Chiu ,  Tzu-Wen Sung

IPC: H04B1/403 ,  H03L7/089 ,  H03L7/099 ,  H04L7/033

Abstract: Disclosed herein are devices and methods to reduce unwanted CIM3 emission in a wireless communication device, such that the transmit (TX) power level applied in a RU can be increased without exceeding a regulatory emission requirement. In some aspects, unwanted emission may be reduced by shifting or changing local oscillator (LO) frequencies during TX operation. Some embodiments are directed to a fast-locking PLL with adjustable bandwidth that can be controlled to increase the PLL bandwidth during the RX to TX transition to provide a fast locking to a new LO frequency. Some aspects are directed to configuring an LO frequency shift amount for different RUs when multiple RUs are allocated within a frequency band.

公开(公告)号：US20220014227A1

公开(公告)日：2022-01-13

申请号：US17353351

申请日：2021-06-21

Applicant: MediaTek Inc.

Inventor： Yu-Hsien Chang ,  Po-Chun Huang ,  Pi-An Wu ,  Wen-Hsien Chiu ,  Tzu-Wen Sung

IPC: H04B1/403 ,  H04L7/033 ,  H03L7/089 ,  H03L7/099

Abstract: Disclosed herein are devices and methods to reduce unwanted CIMS emission in a wireless communication device, such that the transmit (TX) power level applied in a RU can be increased without exceeding a regulatory emission requirement. In some aspects, unwanted emission may be reduced by shifting or changing local oscillator (LO) frequencies during TX operation. Some embodiments are directed to a fast-locking PLL with adjustable bandwidth that can be controlled to increase the PLL bandwidth during the RX to TX transition to provide a fast locking to a new LO frequency. Some aspects are directed to configuring an LO frequency shift amount for different RUs when multiple RUs are allocated within a frequency band.