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Real-time multichannel ranging code generation device and method

A technology for generating a device and a ranging code, applied in the field of satellite navigation, can solve problems such as low efficiency and large hardware resource occupation, and achieve the effects of saving hardware resources, improving work efficiency, and preventing data loss

Inactive Publication Date: 2018-04-24
深圳市德赛微电子技术有限公司
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Problems solved by technology

[0006] In order to solve the above problems, the present invention provides a real-time multi-channel ranging code generation device and method, which can solve the problem of large hardware resource occupation and low efficiency when tracking multiple satellites when only one ranging code generator is used. And other issues

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  • Real-time multichannel ranging code generation device and method

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Embodiment Construction

[0030] As shown in the accompanying drawing, the signal received in the present embodiment takes GPS L1C satellite as an example, a kind of real-time multi-channel ranging code generation device, comprises satellite number PRN queue receiver 15, code generator state machine 14, code generator Parameter register 16, gate 11, ranging code generator 12, splitter 13, and FIFO data terminal 19, crystal oscillator 18 and phase-locked loop device 17, satellite number PRN queue receiver 15 and code generator state machine 14 Two-way connection, and the satellite number PRN queue receiver 15 receives and stores the satellite number PRN, and numbers the satellite number PRN i, i=1,2,3,...i;

[0031] The code generator state machine 14 is respectively connected with the input end of the gate 11, the output end of the ranging code generator 12 and the input end of the splitter 13, and the code generator state machine 14 receives the satellite number PRN queue receiver 15 The transmitted P...

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Abstract

The invention relates to a real-time multichannel ranging code generation device and method. The device mainly includes a satellite number PRN queue receiver, a code generator state machine, a code generator parameter register, a gating device, a ranging code generator, a shunt and an FIFO data end. The problems of occupation of a lot of hardware resources and low efficiency during the tracking ofmultiple satellites are solved under the condition that only one ranging code generator is used.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a real-time multi-channel ranging code generation device and method. technical background [0002] GPS (Global Positioning System, Global Positioning System) has been widely used in guidance, navigation, precision measurement, and precise timing. In GPS applications, the ranging code of the GPS L1C signal is an important point, because the ranging code uniquely corresponds to the satellite number, and the ranging codes of the pilot and data channels are constructed based on the ranging code, because different ranging sequence indexes Both w and the insertion point p of the extended sequence are different, so their uniqueness and asterisk attribution can be determined. The general rules for constructing ranging codes for GPS signals are as follows: First, generate a 10223-bit Legendre sequence L(t) (t = 0 ~ 10222). This sequence is XORed with the Legendre sequence shifted by ...

Claims

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Application Information

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IPC IPC(8): G01S19/30
CPCG01S19/30
Inventor 刘学勇原青巴晓辉王云孙永刚赵星蒋芳钟晨陈杰
Owner 深圳市德赛微电子技术有限公司
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