US 11,943,085 B2
Polar transmitter with feedthrough compensation
Wael Al-Qaq, Oak Ridge, NC (US); Xiaobao Yu, Shanghai (CN); Zhihang Zhang, Cary, NC (US); and Min Yi, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Nov. 28, 2022, as Appl. No. 17/994,570.
Application 17/994,570 is a continuation of application No. 17/351,779, filed on Jun. 18, 2021, granted, now 11,516,054.
Application 17/351,779 is a continuation of application No. PCT/CN2019/127246, filed on Dec. 21, 2019.
Claims priority of provisional application 62/784,099, filed on Dec. 21, 2018.
Prior Publication US 2023/0106513 A1, Apr. 6, 2023
Int. Cl. H04L 27/12 (2006.01); H04L 25/02 (2006.01); H04L 27/20 (2006.01)
CPC H04L 27/2092 (2013.01) 17 Claims
OG exemplary drawing
 
1. A polar transmitter, comprising:
a transmitter for transmitting a radio frequency signal;
a processor that includes a digital modulation circuit, the digital modulation circuit configured to:
generate a modulated digital signal including an in-phase signal component and a quadrature signal component; and
a correction circuit, the correction circuit configured to:
apply a complex digital offset including an in-phase offset correction factor and a quadrature offset correction factor for generating a corrected amplitude signal component and a corrected phase signal component from the in-phase signal component and the quadrature signal component,
wherein the processor is configured to:
provide the corrected amplitude signal component and the corrected phase signal component to the transmitter of the polar transmitter,
wherein the transmitter includes an amplifier to combine the corrected amplitude signal component and the corrected phase signal component, and wherein the correction circuit generates the corrected amplitude signal component and the corrected phase signal component to compensate local oscillator feedthrough.