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A Carrier Phase Cycle Slip Suppression Method Based on Phase Error Limiting Processing

A phase error and clipping processing technology, applied in the navigation field, can solve problems such as unsatisfactory processing effects, and achieve convenient implementation, noise insensitivity, and simple implementation

Active Publication Date: 2017-12-19
湖南中电星河电子有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The influence of cycle slips on carrier phase measurement can be reduced by detecting and repairing cycle slips on carrier phase measurement values, but this method is easily affected by receiver dynamics and satellite and receiver clock errors, and when the number of cycle slips is small or When cycle skips occur frequently, the processing effect is not ideal

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  • A Carrier Phase Cycle Slip Suppression Method Based on Phase Error Limiting Processing
  • A Carrier Phase Cycle Slip Suppression Method Based on Phase Error Limiting Processing
  • A Carrier Phase Cycle Slip Suppression Method Based on Phase Error Limiting Processing

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Embodiment Construction

[0028] The carrier phase cycle slip suppression method based on the phase error clipping processing provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] figure 1 It is a flow chart of the carrier phase cycle slip suppression method based on phase error clipping processing provided by the present invention.

[0030] Step 1: Build a Carrier Tracking Loop

[0031] The carrier tracking loop is composed of four parts: a carrier phase discriminator, a phase error limiter, a loop filter and a voltage controlled oscillator, and the phase error limiter includes an instantaneous phase error limiter and a phase error cumulative value The limiter has two parts. The input end of the phase detector is the signal input end of the carrier tracking loop, the output end of the phase detector is connected to the instantaneous phase error limiter, the output end of the instantaneous phase error limiter is connected to the ph...

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Abstract

The invention provides a carrier phase cycle slip inhibition method based on phase error amplitude-limiting processing. According to main factors causing carrier phase cycle slip, a carrier wave tracking loop easily produces phase jump when a tracking loop produces dramatical phase jitter or concentrated emergence of the same phase deviations of multiple symbols in a short time. According to the factors causing the phase cycle slip, phase errors output by a phase discriminator can be processed in the carrier wave tracking loop. Large phase jitter and the phase deviations of the same continuous symbols can be avoided by conducting amplitude limiting on instantaneous phase discrimination errors and accumulation values of phase discrimination errors, and accordingly the occurrence probability of the phase cycle slip of the loop is can be reduced. Compared with a traditional carrier wave tracking method, the occurrence probability of the phase cycle slip of the carrier wave tracking loop can be reduced by 67% under the condition that the dynamic conditions of the loop are not considered, and the occurrence probability of the phase cycle slip of the carrier wave tracking loop can be reduced by 38% under the condition that the Doppler frequency of input signals is constant.

Description

technical field [0001] The invention belongs to the technical field of navigation, and in particular relates to a carrier phase cycle-slip suppressing method based on phase error limiting processing, which can be used in satellite navigation signal receivers or other types of spread spectrum receivers. Background technique [0002] In high-precision receivers, carrier phase measurements are often used for positioning. Carrier phase cycle slip is one of the important factors affecting the tracking accuracy of carrier phase measurements. For a general high-precision receiver, the measurement accuracy of the carrier phase can reach the centimeter or even millimeter level. However, one cycle of the carrier phase cycle can cause a deviation of about 20cm in the measured value of the carrier phase. In order to reduce the influence of the carrier phase cycle slip on the carrier phase measurement value, it is necessary to deal with the phase cycle slip in the carrier phase measurem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/37G01S19/29
CPCG01S19/29G01S19/37
Inventor 肖志斌唐小妹马春江彭竞雍玲黄龙楼生强王勇刘哲
Owner 湖南中电星河电子有限公司
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