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.

公开(公告)号：US11805396B2

公开(公告)日：2023-10-31

申请号：US16831741

申请日：2020-03-26

Applicant: Analog Devices, Inc.

Inventor： Eugene Oh Hwang ,  Tao Yu ,  Phillip Nadeau ,  Michael Judy ,  Rui Zhang

IPC: H04W24/02 ,  H04W4/38 ,  H04W24/08

CPC classification number: H04W4/38 ,  H04W24/02 ,  H04W24/08

Abstract: Described herein are techniques for improving the signal-to-noise ratio of a wireless sensor platform. The device that interrogates a wireless sensor node (an interrogator) may be configured to determine the quantity to be measured by extracting information from multiple echoes produced in response to multiple interrogation pulses or produced due to multi-path propagation. Although different echoes may have been transformed to different extents, the echoes may share unique characteristics that are specific to the wireless sensor node that produced them. Accordingly, the SNR may be improved by keeping only portions of the received signal that exhibit such characteristics. The SNR may be further improved by summing the echoes together. In some embodiments, the echoes may be summed together in a coherent fashion, thereby producing an echo having an amplitude greater than the amplitude of each of the received echoes.

公开(公告)号：US10932220B2

公开(公告)日：2021-02-23

申请号：US16659887

申请日：2019-10-22

Applicant: Analog Devices, Inc.

Inventor： Tao Yu ,  Tze Lei Poo ,  Lance Doherty ,  Philip P. E. Quinlan

IPC: H04W4/40 ,  H04W64/00 ,  G01S13/84 ,  B62D65/00 ,  G07C5/08

Abstract: Systems and methods permit automatic joining of a network associated with a specified area within which wireless nodes reside. Network managers located in or near the specified area use wireless proximity detection to estimate distances to wireless nodes requesting to join the network. The network managers can use the estimated distances to determine whether or not a requesting wireless node is located within the specified area. If the requesting wireless node is located within the specified area, the network managers can permit the wireless node to join the wireless network associated with the respective specified area.