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Generation method for complex carrier navigation signal

A technology of composite carrier and navigation signals, which is used in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices and other directions to achieve the effect of avoiding interference and good anti-narrowband interference performance.

Active Publication Date: 2015-01-07
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In short, the development trend of the existing satellite navigation signal system and the diversified requirements of the ground navigation augmentation system make the application of the existing navigation signal system have great limitations

Method used

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  • Generation method for complex carrier navigation signal
  • Generation method for complex carrier navigation signal
  • Generation method for complex carrier navigation signal

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Embodiment Construction

[0030] The generation method of composite carrier navigation signal of the present invention, it comprises:

[0031] Step 1, frequency allocation is performed on the bandwidth of the ranging channel used, and M sub-carriers and frequency points and bandwidths corresponding to M sub-carriers are allocated;

[0032] Step 2, encoding the navigation data source on the single frequency point of each ranging channel of the M subcarriers by the encoder to form M binary data streams;

[0033] Step 3, under the drive of the spread spectrum sequence driving clock, each spread spectrum sequence generator performs spread spectrum modulation on the M binary data streams to generate M high-speed binary spread spectrum code sequences, and then through M modulo two additions The device carries out modulo two addition to the M high-speed binary spread spectrum code sequences, and obtains the pure baseband signal of the subcarriers after M channel spread spectrum modulation;

[0034] Step 4, u...

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Abstract

The invention provides a generation method for a complex carrier navigation signal. The method comprises the steps of step 1, coding navigation data sources with equal intervals on the single frequency point of each ranging channel by a coder, so as to form multiple binary data code streams; 2, performing spread spectrum modulation on the multiple binary data code streams, and performing modular two addition to obtain multiple sub carrier signals subjected to spread spectrum modulation; step 3, performing sub carrier modulation to form multiple sub carriers of different frequencies; step 4, performing power distribution on the complex carrier navigation signal to form multiple sub carriers; 5, performing converging processing on the multiple sub carriers and using the converging signal as the baseband signal; step 6, performing up-conversion on the baseband signal by a radiofrequency oscillator to form a complex carrier navigation signal. The generation method for the complex carrier navigation signal overcomes the limitation of the existing navigation signal system, so the performance and precision of the navigation signal are improved, and the daily diversified needs of a ground navigation enhancement system are met.

Description

technical field [0001] The invention belongs to the navigation signal system technology, in particular to a method for generating a composite carrier navigation signal. Background technique [0002] Global Navigation Satellite System (GNSS), as the same infrastructure in the information age, can provide all-weather, continuous and accurate position, speed and time information to sea, land and air users around the world. At present, many countries in the world have successively built satellite navigation systems with independent intellectual property rights, and have continuously upgraded and improved the systems. In order to meet the needs of more application scenarios, such as: urban canyons, deep forests, elevated roads, etc., as well as increasingly diversified user needs, such as: geodetic survey, aerospace survey, fine strike, etc., the ground navigation enhancement system of auxiliary satellite navigation system came into being . [0003] As one of the important comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21G01S19/44
CPCG01S19/01G01S19/015G01S19/44
Inventor 徐颖袁超张晓光李子申罗瑞丹罗晓燕
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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