公开(公告)号：US20220385318A1

公开(公告)日：2022-12-01

申请号：US17824899

申请日：2022-05-26

Applicant: Analog Devices, Inc.

Inventor： Xiao Yu WANG ,  Milutin Pajovic ,  Omer Tanovic ,  Tao Yu ,  Nevena Rakuljic ,  Gregory Patrick Davis

IPC: H04B1/10 ,  H04L25/03

Abstract: Non-idealities of input circuitry of a receiver signal chain can significantly degrade the overall performance of the receiver signal chain. A digital nonlinearity correction (NLC) can be implemented in a receiver signal chain having an ADC. Digital NLC can be designed as a drop in signal preconditioner for existing RF ADC wideband receiver signal chains. A unique equalizer can compensate for a variety of mixer spurs. Accordingly, digital NLC can correct nonlinearities due to mixers and any amplifiers preceding or following the ADC, potentially improving receive chains performance by 15-25 dB. Such a digital NLC solution can be particularly beneficial in defense and instrumentation applications which demand the greatest performance.

公开(公告)号：US12119853B2

公开(公告)日：2024-10-15

申请号：US17824899

申请日：2022-05-26

Applicant: Analog Devices, Inc.

Inventor： Xiao Yu Wang ,  Milutin Pajovic ,  Omer Tanovic ,  Tao Yu ,  Nevena Rakuljic ,  Gregory Patrick Davis

IPC: H04B1/10 ,  H04L25/03

CPC classification number: H04B1/10 ,  H04L25/03878

Abstract: Non-idealities of input circuitry of a receiver signal chain can significantly degrade the overall performance of the receiver signal chain. A digital nonlinearity correction (NLC) can be implemented in a receiver signal chain having an ADC. Digital NLC can be designed as a drop in signal preconditioner for existing RF ADC wideband receiver signal chains. A unique equalizer can compensate for a variety of mixer spurs. Accordingly, digital NLC can correct nonlinearities due to mixers and any amplifiers preceding or following the ADC, potentially improving receive chains performance by 15-25 dB. Such a digital NLC solution can be particularly beneficial in defense and instrumentation applications which demand the greatest performance.

公开(公告)号：US20240297622A1

公开(公告)日：2024-09-05

申请号：US18262553

申请日：2022-02-22

Applicant: Analog Devices, Inc.

Inventor： Christopher Mayer ,  Tao Yu ,  Gregory Patrick Davis

IPC: H03F1/32 ,  H03F3/189 ,  H03F3/24

CPC classification number: H03F1/3247 ,  H03F3/189 ,  H03F3/24

Abstract: Apparatus and methods for pre-distorting a radio frequency transmit signal based on local oscillator clock shaping are disclosed. In certain embodiments, one or more clock signals generated by a local oscillator and used for mixing in a transceiver are shaped to account for non-linearity of a power amplifier that amplifies the radio frequency transmit signal. Such pre-distortion can be performed in addition to or alternatively to performing digital pre-distortion on a digital representation of the radio frequency transmit signal.