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A Carrier Phase Multipath Suppression Method Based on Punctual Code Reference Waveform Design

A carrier phase and reference waveform technology, applied in the field of navigation, can solve difficult problems such as carrier multipath deviation repair, and achieve the effect of convenient implementation, small amount of calculation, and simple realization

Active Publication Date: 2020-03-20
湖南中电星河电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes it difficult to repair the carrier multipath deviation in a short time even with the data filtering method

Method used

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  • A Carrier Phase Multipath Suppression Method Based on Punctual Code Reference Waveform Design
  • A Carrier Phase Multipath Suppression Method Based on Punctual Code Reference Waveform Design
  • A Carrier Phase Multipath Suppression Method Based on Punctual Code Reference Waveform Design

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Embodiment Construction

[0037] The carrier phase multipath suppression method based on the punctual code reference waveform design provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] figure 1 It is a structural block diagram of the receiver based on the punctual code reference waveform provided by the invention.

[0039] The first step, carrier quadrature demodulation

[0040] After the received signal is demodulated by carrier quadrature, the in-phase component z is obtained respectively i and the quadrature component z q ;

[0041] The second step, the local reference code

[0042] The local code generator generates the original local code sequence, and the advanced code generator and the lagging code generator respectively perform shift operations on the original code sequence to generate corresponding leading codes and lagging codes; while the PCRW code generator generates based on the original local code. PCRW reference...

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Abstract

The invention relates to a carrier phase multi-path suppression method based on punctual code reference waveform design. The invention defines the concept of multipath peak-to-peak ratio in the punctual correlator, and uses the multipath peak-to-peak ratio to measure the influence of multipath on carrier phase measurement. According to the characteristic that the multipath signal always lags behind the direct signal, a design method of punctual code reference waveform is proposed. The asymmetric cross-correlation function constructed by this method can suppress the cross-correlation of lagging signals and improve the anti-carrier phase multipath capability. Through theoretical analysis and simulation demonstration, the carrier phase multipath suppression method proposed in this paper can reduce the carrier phase multipath error envelope area by about 49% when the reference waveform gate width is 1 / 4 chip, effectively improving the The carrier multipath suppression capability of the receiver.

Description

technical field [0001] The invention belongs to the technical field of navigation, and in particular relates to a carrier phase multipath suppression method based on punctual code reference waveform design, which can be used in satellite navigation signal receivers or other types of spread spectrum receivers. Background technique [0002] In the global navigation satellite positioning system, high-precision positioning technologies such as Real Time Kinematic (RTK) and Precise Point Position (PPP) provide users with centimeter-level positioning services by using carrier phase. Carrier phase multipath is one of the main sources of error in high-precision positioning, especially in urban environments with severe multipath fading. Multipath effects can cause centimeter-level deviations in carrier phase measurements. [0003] High-precision positioning technology can reduce the influence of tropospheric delay, ionospheric delay and clock error on carrier phase measurement by mea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/22G01S19/37
CPCG01S19/22G01S19/37
Inventor 唐小妹马春江刘瀛翔肖志斌孙广富孙鹏跃陈雷张可左勇
Owner 湖南中电星河电子有限公司