Receiver, communication system, control circuit, and storage medium
US11942981B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2022 |
| Grant date | Mar 26, 2024 |
| Priority date | — |
| Expiry date | Jul 15, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/6912
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A receiver includes: a correlation value calculation unit calculating a first cross-correlation function between a received signal, having a preamble spread with an up chirp and a down chirp, and the up chirp and calculating a second cross-correlation function between the received signal and the down chirp; a power value calculation unit calculating first and second power values of the first and second cross-correlation functions; a correlation power memory storing the first and second power values at each sample timing for one period of a spread code; a threshold determination unit determining first and second estimated timings from the first and second power values for one period of the spread code, respectively; and an estimation unit estimating a spread code timing of a transmitter using the first and second estimated timings, and performing coarse estimation of a frequency offset with respect to the transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.