公开(公告)号：US20230189316A1

公开(公告)日：2023-06-15

申请号：US17547396

申请日：2021-12-10

Applicant: Silicon Laboratories Inc.

Inventor： Sriram Mudulodu ,  Manoj Kumar Medam ,  Rambabu Katla ,  Anil Kumar Adavally ,  Aravinth Kumar Ayyappannair Radhadevi

IPC: H04W72/08

CPC classification number: H04W72/085

Abstract: In one embodiment, an apparatus includes: a compensation circuit to select one of a plurality of compensation sets based on an allocated resource unit (RU) and compensate a digital complex signal using the selected compensation set; a digital-to-analog converter to convert the compensated digital complex signal to a compensated analog complex signal; a mixer coupled to the digital-to-analog converter to upconvert the compensated analog complex signal to a radio frequency (RF) signal; and a power amplifier coupled to the mixer to amplify the RF signal.

公开(公告)号：US11528179B1

公开(公告)日：2022-12-13

申请号：US17376349

申请日：2021-07-15

Applicant: Silicon Laboratories Inc.

Inventor： Aravinth Kumar Ayyappannair Radhadevi ,  Sanjeev Kumar Soni

IPC: H04L27/36 ,  H04L27/26 ,  H04L27/34 ,  H04L27/38

Abstract: In one embodiment, an apparatus includes a baseband circuit to generate a plurality of subcarriers of a complex sample of a message to be transmitted, and a compensation circuit coupled to the baseband circuit, the compensation circuit to compensate for IQ mismatch. The compensation circuit may include: a calibration circuit to determine, using a tone signal, gain correction values and phase correction values for a subset of the plurality of subcarriers; and a correction circuit to apply the gain correction values and the phase correction values to the plurality of subcarriers to compensate for the IQ mismatch.