Method and device for determining satellite validity, storage medium and receiver

An effective, satellite technology, applied in the field of satellite navigation, can solve problems such as increasing positioning delay

Active Publication Date: 2020-08-14
南京大鱼半导体有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, after the satellite signal is captured, the data needs to be received again to verify the validity of the satellite, which increases the delay of positioning

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  • Method and device for determining satellite validity, storage medium and receiver
  • Method and device for determining satellite validity, storage medium and receiver
  • Method and device for determining satellite validity, storage medium and receiver

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Embodiment Construction

[0057] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0058] First, the GNSS baseband signal is introduced. The baseband signal of the satellite can first modulate the bits of the navigation message at a length N code On the specific bit sequence of each sequence, each specific bit in each sequence is modulated on the PRN (Pseudo Random Noise, pseudorandom noise) code that identifies the satellite ID, and each PRN code is composed of N chip The duration of each PRN code is 1 millisecond, so the duration of each navigation message bit is N code millisecond.

[0059] For example, refer to figure 1 , the bits of the navigation message can be modulated on a specific bit sequence with a length of 20, and then eac...

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Abstract

The invention relates to a method and device for determining the satellite validity, a storage medium and electronic equipment, and aims to reduce positioning delay. The method comprises the steps ofdetermining a code phase estimation value and a Doppler estimation value of a captured satellite signal; performing frequency offset correction on the satellite signal according to the Doppler estimation value; performing correlation calculation on the corrected baseband signal according to the code phase estimation value; performing phase rotation on the baseband signal after correlation calculation according to a plurality of preset frequency offsets to obtain a plurality of corresponding correlation value sequences, and dividing the correlation value sequences according to a plurality of preset bit boundaries for each correlation value sequence to obtain a plurality of target sub-sequences; and for each correlation value sequence, performing coherent accumulation on the target sub-sequence corresponding to each preset bit boundary to obtain a plurality of metric values, and if the ratio of the maximum metric value corresponding to the code phase estimation value to the noise power of the satellite signal is greater than or equal to a preset threshold value, determining that the captured satellite signal is valid.

Description

technical field [0001] The present disclosure relates to the technical field of satellite navigation, and in particular, to a method, device, storage medium and receiver for determining the validity of satellites. Background technique [0002] GNSS (Global Navigation Satellite System) is a system that uses observations such as pseudorange, ephemeris, and satellite launch time of a group of satellites to provide users with services such as positioning, speed determination, and timing. When GNSS performs positioning, it must first capture the signals of visible satellites, and obtain the visible satellite ID, code phase and Doppler. After the acquisition is successful, it is necessary to receive the signal again to confirm the validity of the satellite. In this way, after the satellite signal is captured, the data needs to be received again to verify the validity of the satellite, which increases the delay of positioning. Contents of the invention [0003] The purpose of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/40G01S19/24
CPCG01S19/40G01S19/24
Inventor 朱凌周彬许百成
Owner 南京大鱼半导体有限公司
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