Beidou No.3 RDSS area long message sending method in high-speed dynamic environment

Abstract

The invention discloses a Beidou No.3 RDSS area long message sending method in a high-speed dynamic environment. The method comprises the steps of receiving a Beidou No.3 wave beam and acquiring an inbound response wave beam; after a message sending instruction is received, framing data needing to be sent to obtain data to be sent; observing the obtained inbound response wave beam and converting to inbound Doppler data; processing the inbound Doppler data and transmitting the data; monitoring and processing the data transmitting process in real time, and completing data transmitting. According to the invention, Doppler compensation is carried out on a carrier and a pseudo code at a transmitting starting point, and compensation is carried out in real time in the transmitting process, so that inbound signal demodulation failure caused by overlarge dynamic in the transmitting process is prevented, and frequency offset is ensured to be in an extremely low state in the whole transmitting process, so that the inbound success rate is improved; moreover, the method is easy to understand, can be quickly realized based on conventional tracking design, can be used for any navigation equipment using the Beidou No.3 signal RDSS frequency point, and is stable, feasible and high in reliability.

Description

technical field [0001] The invention belongs to the field of navigation signal processing, and in particular relates to a method for sending Beidou-3 RDSS area long messages in a high-speed dynamic environment. Background technique [0002] With the development of economy and technology and the improvement of people's living standards, navigation technology has been widely used in people's production and life, bringing endless convenience to people's production and life. Therefore, the stable, reliable and accurate operation of the navigation system has become one of the most important tasks of the navigation system. [0003] At present, my country's Beidou-3 system has been officially put into operation; the regional short message communication function is a characteristic function of my country's Beidou satellite navigation system, which mainly serves China and surrounding areas. The short message capacity of Beidou-3 system area is 10 million times per hour, the transmis...

AI Technical Summary

Problems solved by technology

At this time, if the carrier is in a medium-to-high-speed dynamic motion scene, the uplink frequency will fluctuate during the message sending process, making the frequency deviation too large, thus exceeding the frequency deviation range of the inbound receiver's capture and stable tracking; In this case, even if the inbound receiver can capture the inbound signal, it will cause information demodulation errors or even loss of lock due to dynamic reasons

[0005] For the above-mentioned problems in the application of regional short message communication, the Beidou No. 3 system has no good solution, which seriously restricts the application of the regional short message communication function of the Beidou No. 3 system

Images