Structure of base band circuit for realizing double frequency GPS satellite signal receiver and method thereof

A satellite signal and baseband circuit technology, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve the obstacles to the large-scale popularization and application of GPS navigation technology, the performance is difficult to achieve stable and reliable, and the complex circuit structure and other problems, to achieve the effects of stable and reliable working performance, improved anti-interference performance, and simple circuit structure

Inactive Publication Date: 2010-05-19
SHANGHAI HUACE NAVIGATION TECH
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Problems solved by technology

However, these methods all need to be at the expense of complex circuit structures and high-performance processors, not only the cost is high, but also the perfo

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  • Structure of base band circuit for realizing double frequency GPS satellite signal receiver and method thereof
  • Structure of base band circuit for realizing double frequency GPS satellite signal receiver and method thereof
  • Structure of base band circuit for realizing double frequency GPS satellite signal receiver and method thereof

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Embodiment Construction

[0041] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0042] see Figure 1 to Figure 3 As shown, the baseband circuit structure of the dual-frequency GPS satellite signal receiver includes signal preprocessing circuits and several satellite processing channels. The number of satellite processing channels is consistent with the number of tracked satellites, usually 12 .

[0043] At the same time, it should be pointed out that the baseband part of the signal in the present invention is sent to 12 satellite processing channels at the same time after preprocessing, where the 12 channels are completely the same, and the number of channels can be expanded or reduced according to needs and FPGA capacity. Since the structures of the 12 channels are exactly the same, only for tracking different satellites at the same time, only the structure of one channel is discussed in the present invention. figure ...

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Abstract

The invention relates to a structure of base band circuit for realizing double frequency GPS satellite signal receiver. The base band circuit mainly comprises an L1 processing circuit and an L2 processing circuit, the input end is connected with the output of a radio-frequency circuit, and the output end is connected with a central processing module. The L1 processing circuit mainly comprises an L1C/A code track loop module, an L1 carrier wave track loop module, an L1W cycle estimation module and an L1P code generation module; the L2 processing circuit comprises an L2 carrier wave track loop module, an L2P track loop module, an L2W estimation module, an L1 and L2 cross multiplier and an L2 correlator. The L1 and L2 cross multiplier and the L2 correlator are designed and realized in a DSP module built in an FPGA circuit module. The invention also relates to a method for realizing signal track on GPS L2 channel by the structure of base band circuit. By adopting the structure of base band circuit for realizing double frequency GPS satellite signal receiver and the method thereof, the velocity and performance of the system are improved greatly, the system scale and cost are reduced, the anti-interference performance of the receiver is enhanced, the circuit structure is simple, the working performance is stable and reliable, and the application range is wide.

Description

technical field [0001] The present invention relates to the field of GPS navigation, positioning and measurement, in particular to the technical field of a dual-frequency GPS (Global Positioning System) satellite signal receiving and processing device, in particular to a baseband circuit structure and method for realizing a dual-frequency GPS satellite signal receiver. Background technique [0002] Satellite navigation is to receive the navigation positioning signal sent by the navigation satellite, and use the navigation satellite as a dynamic known position to measure the current position and speed in real time. Wherein it relates to the L2 signal acquisition and tracking method of the dual-frequency GPS receiver in the field of GNSS (Global Navigation Satellite System, ie Global Navigation Satellite System). GPS satellite signals are usually spread-spectrum modulated using a pseudo-random code (PRN). GPS satellite signals mainly include C / A code (Coarse, civil code) and ...

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Application Information

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IPC IPC(8): G01S19/13G01S19/30
CPCG01S19/30G01S19/29G01S19/32
Inventor 宋阳王永泉朱亚宁刘杰王杰俊刘若普
Owner SHANGHAI HUACE NAVIGATION TECH
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