公开(公告)号：US20250038752A1

公开(公告)日：2025-01-30

申请号：US18783547

申请日：2024-07-25

Applicant: QUALCOMM Incorporated

Inventor： Jang Joon LEE ,  Aleksandar Miodrag TASIC ,  Prakash THOPPAY EGAMBARAM ,  Kyle David HOLLAND ,  Chih-Fan LIAO ,  Tomas O'SULLIVAN ,  Dhon-Gue LEE ,  Dongling PAN ,  Chirag Dipak PATEL ,  Yangchuan CHEN

IPC: H03L7/099 ,  H03L7/10

Abstract: Certain aspects of the present disclosure are directed towards apparatus and techniques for receiver calibration. An example apparatus generally includes: a first receiver having a first oscillating signal generation circuit, an output of the first oscillating signal generation circuit being coupled to an input of a first splitter, wherein the first splitter has multiple outputs; a second receiver having a second oscillating signal generation circuit coupled to an LO input of each of a first plurality of mixers of the second receiver; and signal paths between the multiple outputs of the first splitter and signal inputs of the first plurality of mixers, respectively.

公开(公告)号：US20230421195A1

公开(公告)日：2023-12-28

申请号：US18338642

申请日：2023-06-21

Applicant: QUALCOMM Incorporated

Inventor： Jang Joon LEE ,  Kyle David HOLLAND ,  Prakash THOPPAY EGAMBARAM ,  Aleksandar Miodrag TASIC

IPC: H04B1/18

CPC classification number: H04B1/18

Abstract: Carrier aggregation (CA) may cause interference between operation on two or more carriers within a user equipment (UE). This interference can degrade signal quality on one or more of the carriers involved in the carrier aggregation, which may be referred to as “desensing” one or more carriers. One or more isolating buffers may be coupled at a down-conversion mixer at a point where the down-conversion mixer receives a signal from a transmission line for isolating the transmission line from other transmission lines. The isolating buffer may reduce the effect of interference between multiple transmission lines carrying different carriers during carrier aggregation (CA) operation. The isolating buffers may be used in an RF transceiver supporting both 5G sub-7 GHz and 5G mmWave wireless networks and carrier aggregation across sub-7 GHz and mmWave bands.

公开(公告)号：US20230097399A1

公开(公告)日：2023-03-30

申请号：US17448750

申请日：2021-09-24

Applicant: QUALCOMM Incorporated

Inventor： Ahmed ABBAS MOHAMED HELMY ,  Francesco GATTA ,  Balasubramanian RAMACHANDRAN ,  Abhishek Ananthrao KULKARNI ,  Prakash THOPPAY EGAMBARAM ,  Hasnain LAKDAWALA ,  Aleksandar Miodrag TASIC ,  Jang Joon LEE ,  Kyle David HOLLAND

IPC: H04B1/40 ,  H04B1/10

Abstract: Certain aspects of the present disclosure generally relate to techniques and apparatus for operating a wireless receiver of the apparatus in a high linearity mode. An example method includes operating the apparatus in a first mode with transmission of a plurality of transmit signals. The method also includes attenuating a received signal via an attenuator while operating the apparatus in the first mode. The method further includes amplifying the attenuated signal with an amplifier while operating the apparatus in the first mode. For certain aspects, the method further involves operating the apparatus in a second mode, bypassing the attenuator while operating the apparatus in the second mode, and amplifying the received signal with the amplifier while operating the apparatus in the second mode.

公开(公告)号：US20220190950A1

公开(公告)日：2022-06-16

申请号：US17124368

申请日：2020-12-16

Applicant: QUALCOMM Incorporated

Inventor： Lai Kan LEUNG ,  Aleksandar Miodrag TASIC ,  Francesco GATTA ,  Chiewcharn NARATHONG ,  Kyle David HOLLAND

IPC: H04K3/00 ,  H03F3/19 ,  H03M1/12

Abstract: The disclosure relates to an apparatus including a receiver configured to process a radio frequency (RF) signal to generate a baseband signal; a radio frequency (RF) jammer detector configured to generate a signal indicative of whether an RF jammer is present at an input of the receiver; and a receiver bias circuit configured to generate a supply voltage for the receiver based on the RF jammer indication signal. In another aspect, the apparatus includes constant gain bias circuit to maintain the gain of the receiver constant in response to changes in the supply voltage. In other aspects, the receiver bias circuit may suspend the generating of the supply voltage based on the RF jammer indication signal if the power level of the target received signal is above a threshold. In other aspects, the receiver bias circuit changes the supply voltage during cyclic prefix (CP) intervals between downlink intervals.