Multichannel joint capture method of satellite navigation receiver

A technology of satellite navigation and joint capture, which is applied in the field of satellite navigation, can solve the problems of long signal capture time, slow signal search speed, and short signal capture time, and achieve convenient and efficient satellite positioning calculation, navigation star selection, and satellite effective data output. The effect of shortening the start-up time and widening the signal search range

Active Publication Date: 2014-02-19
SPACE STAR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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
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Embodiment 1

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

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

[0032] The 12 channel correlators have a parallel structure, so that the same or different satellite signals can be captured and tracked at the same time;

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

[0034] After each channel correlator in the 12 channel correlators completes the search for...

Embodiment 2

[0063] The difference with embodiment 1 is:

[0064] When the signal acquisition system A receives the available stars of the signal acquisition system B as stars 1, 2, 3, and 4, and the local available stars are 0, the union of the available stars is stars 1, 2, 3, and 4 , and the total number reaches 4, then put No. 1, No. 2, No. 3, and No. 4 stars directly into the local channel correlator, and through the placement of accurate stars and Doppler, the signal acquisition system B can complete the alignment within 25s The capture of available stars makes the number of available stars quickly reach 4 for positioning calculation.

Embodiment 3

[0066] The difference with embodiment 1 is:

[0067] When the local available stars of signal acquisition system A are 3, 4, 5, and 6 stars and have been positioned, after receiving the available stars 1, 2, and 3 of signal acquisition system B, although the union of available stars is 1, 2 , 4, 5, and 6 stars, with a total of more than 4 stars. However, since the positioning calculation has been completed locally, the effective navigation star information sent by the signal acquisition system B will not be 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 capture method, in particular to a satellite navigation receiver multi-channel combined capture method, which belongs to the technical field of satellite navigation. Background technique [0002] Satellite navigation receivers are playing an increasingly important role in the application of satellites and spacecraft in my country because they can continuously provide the location, speed and time of the receiver in real time and with high precision by using the satellite signals of the satellite global positioning system covering the whole world. In order to meet the fast and real-time performance of signal acquisition and receiver positioning, multi-channel signal acquisition has become a necessity. [0003] Existing satellite navigation receiver multi-channel acquisition methods mainly contain two kinds, one is to carry out two-dimensional search on code and carrier direction in multiple channe...

Claims

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Application Information

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Patent Type & Authority Patents(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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