Method and device used for processing signal of base band of high dynamic satellite navigation receiver

A baseband processing device, satellite navigation technology, applied in satellite radio beacon positioning systems, measurement devices, instruments and other directions, can solve problems such as time-consuming, Doppler frequency shift, capture bandwidth capture speed cannot meet requirements, etc. The effect of speeding up the search and saving resources

Inactive Publication Date: 2007-05-30
ZHEJIANG UNIV
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Problems solved by technology

This kind of two-dimensional serial search in the uncertain range of carrier frequency and code phase takes a lot of time
At the same time, in a high dynamic environment, there is a large Doppler frequency shift, and becaus

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  • Method and device used for processing signal of base band of high dynamic satellite navigation receiver
  • Method and device used for processing signal of base band of high dynamic satellite navigation receiver

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Embodiment Construction

[0039] The invention realizes the baseband signal processing of the satellite navigation receiver under high dynamic conditions, realizes fast positioning under the cooperation of the upper computer, and can be flexibly configured according to the scale and usage. The method is that in the embodiment, a parallel acquisition engine and a tracking channel are set up independently, and at the same time, a parallel search in the Doppler domain is used to realize fast acquisition.

[0040] The capture process is realized by the capture engine. The acquisition engine includes multiple parallel and independent acquisition correlation channels, which enable parallel acquisition of multiple code sequence phases of the specified satellite signal at the same time. The correlation and accumulation results generated by capturing the correlation channel are transformed from the time domain to the frequency domain to obtain the components in the Doppler domain, and the envelope operation is ...

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Abstract

The invention discloses a processing method and apparatus used for high dynamic satellite navigation receiver baseband signal. The process of the satellite navigation receiver baseband signal is finished via the separated and parallel trapped engine and the tracing channel under the control of upper machine. When it comes to operation, the intermediate frequency signal enters the trapped engine and the tracing channel by mapping sample: the whole Doppler frequency domain parallel trapped algorithm is finished in the trapped engine, generates the local code sequence aligning with the phase of input signal sequence and transfer it to the tracing channel; in the tracing channel, the signal is accumulated timely and extracted, the bit quantity of the telex information, the monitoring quantity of the sheet deviation and the launching temporal information are provided to the upper machine; after the tracing channel losing lock, the trapped engine recaptures the signal. The invention adopts two-dimensional parallel search to accelerate the trapped speed; the trapped engine duplicates the FFT arithmetic unit, envelope arithmetic unit and detector and saves the resource; the module parameter design is fit for different system and scale.

Description

technical field [0001] The invention relates to a method and device for baseband signal processing of a high dynamic satellite navigation receiver. Background technique [0002] High dynamic satellite navigation receiver is a high-end technology in military, aerospace and other application fields. At present, my country's application development in this field is in its infancy. The developed high-dynamic receiver is mainly based on the GPS system. Considering that the GPS system is controlled by the US military and its safety cannot be guaranteed, my country is actively developing independent systems (such as the Beidou satellite navigation system) and other systems (such as the Sino-European cooperation system). The Galileo satellite navigation system and Russia's GLONASS satellite navigation system) carry out research and development of high dynamic navigation receivers. In addition, even in the satellite navigation receiver market for medium and low dynamic applications, ...

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Application Information

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IPC IPC(8): G01S5/02G01S5/14G01S19/37
Inventor 赵民建徐亮许峰周鹏宇
Owner ZHEJIANG UNIV
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