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Multichannel joint capture method of satellite navigation receiver

A satellite navigation and joint acquisition technology, applied in the field of satellite navigation, can solve the problems of long signal acquisition time, short signal acquisition time, slow signal search speed, etc. The effect of shortened start-up time and wide signal search range

Active Publication Date: 2012-07-18
SPACE STAR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned first multi-channel two-dimensional search method has slow signal search speed and long signal capture time, and it is difficult to quickly recover after losing lock under high dynamic conditions; while the second FFT fast capture method has fast signal search speed and short signal capture time , but it is usually implemented with FPGA, the algorithm is complex and requires a lot of calculation and consumes a lot of resources

Method used

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  • Multichannel joint capture method of satellite navigation receiver
  • Multichannel joint capture method of satellite navigation receiver
  • Multichannel joint capture method of satellite navigation receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for multi-channel joint acquisition of satellite signals by a satellite navigation receiver includes the following steps:

[0031] 1) Establish two signal acquisition systems on the satellite navigation receiver, called signal acquisition system A and signal acquisition system B, such as figure 1 As shown, each signal capture system includes a processor, a memory, a 12-channel correlator, and a serial communication UART module. The processor controls the channel correlator, the memory and the serial communication UART module and exchanges data with the three;

[0032] The 12 channel correlators have a parallel structure, which can simultaneously capture and track the same or different satellite signals;

[0033] Each of the 12 channel correlators can only search and track one navigation satellite signal at the same time;

[0034] After each channel correlator of the 12 channel correlators completes the search for a navigation satellite signal, if it does not complete th...

Embodiment 2

[0063] The difference from Embodiment 1 is:

[0064] When signal acquisition system A receives signal acquisition system B's available stars as 1, 2, 3, and 4, and the local available star is 0, the union of available stars is 1, 2, 3, and 4 stars , The total number reaches 4, then the 1, 2, 3, and 4 stars are directly placed into the local channel correlator. Through accurate asterisk and Doppler placement, the signal capture system B can complete the alignment within 25s. The available stars are captured, so that the number of available stars can quickly reach 4 for positioning and solving.

Embodiment 3

[0066] The difference from Embodiment 1 is:

[0067] When the local available satellites of signal acquisition system A are 3, 4, 5, and 6 and have been positioned, after receiving signal acquisition system B's 1, 2, and 3 available satellites, although the union of available stars is 1, 2 , 4, 5, and 6 stars, the total number is more than 4, but because the local positioning solution has been completed, the effective navigation star information sent by the signal acquisition system B is not inserted.

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Abstract

A multichannel capture method of satellite signals, particularly a multichannel joint capture method of a satellite navigation receiver belongs to the technical field of satellite navigation. The multichannel joint capture method includes building two signal capture systems on the satellite navigation receiver; and performing communication connection by utilizing a universal asynchronous receiver / transmitter (UART), collecting different navigation signals capture information data respectively through the two signal capture systems, and exchanging effective information. The multichannel joint capture method of the satellite navigation receiver has the advantages of wide signal searching range, rapid satellite capture speed, small amount of calculation, and little resource consumption. The blind capture (cold start) time of the receiver is shortened, and the two signal capture systems backup each other so that the reliability of the systems is improved. Rapid recovery of a certain system capture system can be achieved by receiving available satellite information of the other system after reset or restart.

Description

Technical field [0001] The invention relates to a satellite signal multi-channel acquisition method, in particular to a satellite navigation receiver multi-channel joint acquisition method, which belongs to the technical field of satellite navigation. Background technique [0002] Satellite navigation receivers can continuously provide real-time and high-precision location speed and time of the receiver by using satellite signals covering the world by the satellite global positioning system, which has shown an increasingly important role in the application of satellites and spacecraft in my country. In order to satisfy the fast and real-time performance of signal acquisition and receiver positioning, multi-channel signal acquisition has become a necessity. [0003] There are mainly two methods for multi-channel acquisition of existing satellite navigation receivers. One is to perform two-dimensional search in the code and carrier direction in multiple channels in the time domain, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/24G01S19/29G01S19/30
Inventor 庞羽佳李烨蒋勇叶扬李东俊刘洋万祥
Owner SPACE STAR TECH CO LTD
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