公开(公告)号：US20230362035A1

公开(公告)日：2023-11-09

申请号：US18352126

申请日：2023-07-13

Applicant: FURUNO ELECTRIC CO., LTD.

Inventor： Daisuke KIMURA ,  Yusuke TOYODA

IPC: H04L25/02

CPC classification number: H04L25/0222

Abstract: The present disclosure provides a frequency deviation estimation device for estimating a frequency deviation upon receiving a digitally modulated non-repetitive signal. The frequency deviation estimation device is equipped with an instantaneous frequency measurement module, a minimum frequency detection module, and a frequency deviation calculation module. The instantaneous frequency measurement module measures the instantaneous frequency of the received communication signal. The minimum frequency detection module detects the minimum frequency of the instantaneous frequency. The frequency deviation calculation module calculates the frequency deviation between the received communication signal and the reference signal for coarse adjustment using the reference minimum frequency and the minimum frequency when the frequency deviation is zero Hertz.

公开(公告)号：US20230344464A1

公开(公告)日：2023-10-26

申请号：US18343564

申请日：2023-06-28

Applicant: FURUNO ELECTRIC CO., LTD.

Inventor： Daisuke KIMURA ,  Yusuke TOYODA

IPC: H04B1/7073 ,  H04L7/04

CPC classification number: H04B1/7073 ,  H04L7/04

Abstract: A timing detection device includes a main reference code generation module, an auxiliary reference code generation module, a first correlation processing module, a second correlation processing module, and a subtraction module. The main reference code generation module generates a main reference code consisting of the same code for synchronization included in a received signal. Using a portion of the same code as the code for synchronization, the auxiliary reference code generation module generates an auxiliary reference code consisting of a code configuration different from the main reference code and without generating a main lobe during correlation processing. The first correlation processing module correlates the received signal with the main reference code and outputs a first correlation result. The second correlation processing module correlates the received signal with the auxiliary reference code and outputs a second correlation result. The subtraction module subtracts the first correlation result from the second correlation result.