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Pseudo random noise code generation unit of multi-mode GNSS (global navigation satellite system) receiver

A technology of pseudo-random noise codes and generating units, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems such as unfavorable pseudo-codes, large ROM area, and updates, and achieve scale, area and power saving consumption effect

Active Publication Date: 2011-05-25
GUANGDONG UNIV OF TECH +1
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Problems solved by technology

Although this method can integrate the code generators of different satellite navigation systems, with the increase of the number of processed satellites and the change of the code length, the area of ​​the ROM used will become larger and larger, and it is not conducive to the launch of new satellites in the future. Pseudocode update

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  • Pseudo random noise code generation unit of multi-mode GNSS (global navigation satellite system) receiver
  • Pseudo random noise code generation unit of multi-mode GNSS (global navigation satellite system) receiver
  • Pseudo random noise code generation unit of multi-mode GNSS (global navigation satellite system) receiver

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, 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.

[0028] The generation of each pseudo-code of the satellite navigation system is based on the linear feedback shift register, which makes the fusion of various pseudo-codes of the satellite navigation system convenient. Figure 4 It is the fusion scheme that each satellite navigation system pseudocode of the present invention produces, as shown in the figure, the scheme includes:

[0029]Generator A 2011, generator B 2012, ..., generator K 2013 and other K generator modules, K is a natural number greater than or equal to 1. The number of K is determined by the satellite navigation system to be proc...

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Abstract

The present invention relates to a pseudo random noise code generation unit of a multi-mode GNSS (global navigation satellite system) receiver, which comprises a satellite navigation system selection module, a satellite selection module, a generator module, an initial phase module and a feedback coefficient selector module. The satellite navigation system selection module is used for selecting a satellite navigation system to generate a pseudo code; the satellite selection module is used for selecting a satellite number for generation of the pseudo code according to the satellite system selected by the satellite navigation system selection module; the generator module is used for generating a required pseudo random sequence and comprises a shifting register for shifting; the initial phase module is used for generating an initial value of the shifting register according to the satellite number selected by the satellite selection module; and the feedback coefficient selector module is used for carrying out operation by selecting different bits of the shifting register according to the satellite system selected by the satellite navigation system selection module, and transmitting operational results to the feedback bit of the shifting register. By adopting the technical scheme, pseudo code generators of various satellite navigation systems such as GPS (global positioning systems), Compass II, GLONASS and GALILEO can be integrated, so the circuit size can be reduced, the processing of signals of various satellite navigation systems via a multi-mode receiver can be facilitated, and the area and the power consumption of a base-band processing chip can also be reduced.

Description

technical field [0001] The invention relates to a pseudo-random noise code generating unit of a multi-mode GNSS receiver. Background technique [0002] GNSS (Global Navigation Satellite System) is a general term for all navigation satellite systems worldwide, including GPS (Global Positioning System, US Global Positioning System), GLONASS (Russian Glonass Navigation Satellite System), Galileo (European Galileo navigation satellite system), BeiDou (China Beidou navigation satellite system), etc., and SBAS (Satellite Based Augmentation System, satellite-based augmentation system) is a satellite system that assists GNSS positioning and navigation, which includes WAAS (Wide Area Augmentation System , American Wide Area Augmentation System), EGNOS (European Geostationary Navigation Overlay Service, European Geostationary Navigation Overlay Service), MSAS (Multi-Functional Satellite Augmentation System, Japan Multi-Functional Satellite Augmentation System) and so on. All the abov...

Claims

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Application Information

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IPC IPC(8): G01S19/13
Inventor 谭伟强潘军
Owner GUANGDONG UNIV OF TECH
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