Method for realizing positioning based on Beidou short message transmission differential signal

A Beidou short message and differential signal technology, applied in the field of satellite signal transmission, can solve problems such as inability to work, capacity limitations, radio station usage limitations, etc., to solve packet loss, reduce transmission data, and improve application efficiency.

Active Publication Date: 2016-03-09
FUJIAN XINGHAI COMM TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It cannot work in remote areas, and the use of radio stations is also greatly limited in terrain such as mountains
Due to the capacity limitation of Beidou short message, some current general differential signal standards (RTCM, etc.) cannot be used

Method used

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  • Method for realizing positioning based on Beidou short message transmission differential signal
  • Method for realizing positioning based on Beidou short message transmission differential signal
  • Method for realizing positioning based on Beidou short message transmission differential signal

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Embodiment Construction

[0021] The invention is a satellite navigation differential technology based on Beidou short messages and a new self-defined transmission format. It mainly includes the base station positioning terminal, the Beidou short message communication module, and the rover positioning terminal. The system architecture diagram is as follows figure 1 shown. figure 2 It is a structure diagram of position difference data in the present invention. image 3 It is a structure diagram of pseudo-range differential data in the present invention. Figure 4 It is a data structure diagram of the retransmission request in the present invention.

[0022] The specific process is as follows:

[0023] Step 1: The reference station terminal obtains a differential correction number according to the received satellite signal and the reference station coordinates, and stores it in the internal memory of the reference station terminal; the differential correction number includes position difference and ...

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Abstract

The invention relates to a method for realizing positioning based on a Beidou short message transmission differential signal. The method is provided in order to improve the applicability of satellite differential positioning, and is used to perform differential positioning in an area with neither network base station nor mobile communication base station. The method comprises the following steps: a reference station terminal gets a differential correction number according to a received satellite signal and the coordinate of a reference station, and stores the differential correction number in an internal memory of the reference station terminal; a moving station terminal generates a differential data request including differential start time and differential frequency, and sends the differential data request to the reference station terminal; the reference station terminal sends corresponding differential data to a reference station coding module after receiving the differential data request sent by the moving station terminal; the reference station terminal sends a single piece of differential data information through a Beidou short message, and multiple cards send differential data information in turn to meet the requirement of the moving station terminal for positioning frequency; and the moving station terminal receives differential data of multiple epochs, uses the data to fit a pseudo-range differential correction number through Chebyshev polynomial interpolation, and uses a correction number obtained by extrapolation to perform differential positioning.

Description

【Technical field】 [0001] The invention belongs to the technical field of satellite signal transmission, and specifically refers to a method for realizing positioning by using Beidou short messages to transmit differential signals. 【Background technique】 [0002] The short-message communication function of the Beidou satellite is a special function that neither the American GPS nor the Russian GLONASS has. It is the world's first satellite navigation system that integrates message communication in addition to positioning and timing. [0003] The Beidou satellite short message communication has the function of two-way digital message communication between the user machine and the user machine, and between the user machine and the ground control center. A common user machine can transmit 36 ​​Chinese characters at a time, and those who apply for approval can transmit 120 Chinese characters or 240 codes. Short messages can not only point-to-point two-way communication, but also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/07G01S19/41
CPCG01S19/07G01S19/41
Inventor 丁祥余卫平苏航宇赵志鸿
Owner FUJIAN XINGHAI COMM TECH
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