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Method for transmitting signal by transmitter device to non-geosynchronous satellite

A technology for transmitting equipment and transmitting signals, which can be used in satellite radio beacon positioning systems, using re-radiation, advanced technology, etc., and can solve problems such as unexpected signal fluctuations

Inactive Publication Date: 2019-07-23
SIGFOX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the propagation of the signal has a tendency to fluctuate unexpectedly, these variations lead to ineffective transmissions, especially when the satellite is not within range of the transmitting device

Method used

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  • Method for transmitting signal by transmitter device to non-geosynchronous satellite
  • Method for transmitting signal by transmitter device to non-geosynchronous satellite
  • Method for transmitting signal by transmitter device to non-geosynchronous satellite

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Embodiment Construction

[0046] figure 1 A wireless telecommunication system 100 is schematically shown comprising a plurality of transmitting devices 110 and satellites 120 of a constellation of pico-satellites previously placed in orbit around the earth.

[0047] The transmitting device 110 and the satellite 120 exchange data in the form of electromagnetic signals. "Electromagnetic signal" means electromagnetic waves that propagate through non-wired devices and whose frequencies are included in the conventional electromagnetic spectrum (ie, a few hertz to several hundred gigahertz).

[0048]In the present non-limiting example of the invention, the transmitting device 110 is a connection object comprising telecommunication means 111 capable of transmitting signals to a satellite 120 . It should be noted that in certain embodiments, objects 110 may also exchange signals between each other.

[0049] For example, the connected object 110 also includes an electronic board 112 equipped with a microproce...

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Abstract

The present invention relates to a method (200) for transmitting a signal by a transmitter device (110) to a satellite (120) moving in orbit around the Earth, the transmitter device (110) and the satellite (120) comprising wireless telecommunication means. The method comprises the following steps: receiving (210), by the transmitter device (110), a signal transmitted by the satellite (120), referred to as a presence signal; analysing (220) a frequency shift caused by Doppler effect on a main frequency of the presence signal received by the device (110); evaluating (230) a proximity criterion between the transmitter device (110) and the satellite (120) on the basis of the analysis of the frequency shift; transmitting a signal by the transmitter device (110) if the proximity criterion is met.

Description

technical field [0001] The present invention is in the field of wireless telecommunication systems, and more particularly relates to a method for transmitting signals between at least one transmitting device and at least one orbiting satellite. [0002] The invention is particularly applicable in the field of connecting objects. Background technique [0003] A particularly advantageous but entirely non-limiting application of the invention is in UNB (Ultra Narrow Band) wireless telecommunication systems. "Ultra-narrowband" means that the instantaneous spectrum of the electromagnetic signal transmitted by the transmitting device to the satellite has a frequency width of less than 2 kilohertz or even less than 1 kilohertz. [0004] This UNB wireless telecommunication system is particularly suitable for M2M (Machine to Machine) or IoT (Internet of Things) type applications. [0005] It should be noted that the lifetime of the transmitting equipment of this type of telecommuni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G01S11/10
CPCG01S5/0246G01S19/29H04B7/18552G01S11/10H04B7/1855H04B7/18539
Inventor 大卫·费尔南德斯克里斯托夫·富尔泰
Owner SIGFOX