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Method for processing Beidou navigation satellite signals, chip and module

A signal processing, Beidou satellite technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems such as energy loss, and achieve the effect of improving sensitivity

Active Publication Date: 2013-10-16
TECHTOTOP MICROELECTRONICS
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Problems solved by technology

[0010] 202 is the internal structure of the navigation bits of the B1 frequency point of the Beidou non-GEO satellite. The bits are encoded twice, which is realized by BPSK adjustment of the NH code. Because of the polarity inversion, direct accumulation and integration within one bit will cause energy loss;

Method used

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  • Method for processing Beidou navigation satellite signals, chip and module
  • Method for processing Beidou navigation satellite signals, chip and module
  • Method for processing Beidou navigation satellite signals, chip and module

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] The secondary code in the navigation bit of the Beidou non-GEO satellite B1 frequency point signal is modulated in BPSK mode, and the stripping method is to use the local source secondary code and the secondary code contained in the signal bit to perform matching demodulation.

[0031] image 3 It is a schematic diagram of the stripping process of the secondary code.

[0032] 301 is the Beidou non-GEO satellite B1 frequency point signal received by the receiver, indicating the secondary code in the navigation bit;

[0033] 302 is the original secondary code stored locally by the receive...

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Abstract

The invention relates to a method for processing Beidou navigation satellite signals, a chip and a module. The invention provides a method for processing non GEO satellite B1 frequency point signals of a Beidou navigation satellite system. The method comprises the steps of acquiring intermediate frequency sampling data of the signals, and peeling secondary codes in the signals before long-term coherent accumulation is carried out. After adopting the technical solution provided by the invention, coherent integration within a bit time duration can be carried out when the secondary codes exist in the Beidou satellite B1 frequency point signals, and the receiver sensitivity including the capture sensitivity and the tracking sensitivity can be effectively improved.

Description

technical field [0001] The invention relates to a method for processing Beidou navigation satellite signals and corresponding chips and modules. Background technique [0002] With the development and improvement of satellite navigation systems, corresponding applications are becoming more and more extensive; today's application of satellite navigation systems is no longer limited to location services in open environments, and many places with poor signal environments also need location service support , so there is an increasing demand for the sensitivity of the navigation receiver. [0003] Usually, when designing a receiver, the most effective and direct way to obtain high sensitivity is to perform correlation integration of the signal for a long time. For the L1 signal of the GPS system, according to its signal characteristics, it is possible to simply complete the correlation integration of the time length within 20 milliseconds through direct accumulation, so as to obt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/35G01S19/13
Inventor 毛磊
Owner TECHTOTOP MICROELECTRONICS
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