公开(公告)号：US20230188155A1

公开(公告)日：2023-06-15

申请号：US18167380

申请日：2023-02-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Artem Vitalyevich CHERENKOV ,  Man ZHAO ,  Mikhail Alexandrovich LINNIK ,  Yijie WANG

IPC: H03M1/66 ,  H03M1/06 ,  H03M1/12 ,  H03M1/08

CPC classification number: H03M1/662 ,  H03M1/0624 ,  H03M1/1215 ,  H03M1/0854

Abstract: A signal processing apparatus includes a plurality of time-interleaving digital-to-analog converters each configured to sample a digital input signal at a preset sub-DAC sample frequency, and to generate an analog sub-DAC output signal. The signal processing apparatus includes analog multiplexer that samples the plurality of sub-DAC output signals at a preset multiplexer clock frequency and generates a multiplexer output signal. The signal processing apparatus further includes a local ADC that receives the multiplexer output signal and generate a digital feedback signal. The signal processing apparatus further includes a digital compensation engine that receives the digital feedback signal from the local ADC and determine one or more distortion compensation parameters. The signal processing apparatus further includes a digital pre-processing stage that receives the one or more distortion compensation parameters from the digital compensation engine and performs distortion compensation pre-processing on the digital input signal.