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Loop self-regulation method of satellite navigation receiver

A satellite navigation and receiver technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems of complex implementation, increased calculation amount, and inconvenient implementation

Inactive Publication Date: 2013-05-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Using inertial devices to assist the tracking loop is the most direct and effective method to compensate the satellite signal dynamics caused by carrier dynamics, which can improve the receiver's adaptability to dynamics and anti-interference ability, but this method is complicated to implement and requires It is inconvenient to change the structure of the original tracking loop of the receiver; when the Doppler frequency shift prior information cannot be provided by the inertial device, the maximum likelihood estimation, the extended Kalman filter adaptive minimum average, etc. Some complex algorithms, these algorithms will lead to a significant increase in the amount of calculation

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  • Loop self-regulation method of satellite navigation receiver
  • Loop self-regulation method of satellite navigation receiver
  • Loop self-regulation method of satellite navigation receiver

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Embodiment Construction

[0038] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] The present invention provides a satellite navigation receiver loop self-regulation method, the tracking loop operation flow is as follows figure 1 shown. First, set the initial tracking bandwidth and order of the loop to enable the work of the three-axis accelerometer chip. The accelerometer chip outputs the acceleration value of the carrier in each sampling period, and the method processes the output of the accelerometer chip, and stores the acceleration and acceleration change rate values ​​as the basis for judging the order of the loop. In each loop processing cycle, the following cyclic processing is performed on each channel: read 1ms data, establish local code information and local carrier, mix local carrier and input IF signal, then perform correlation integral processing, and then use correlation integral The result is pha...

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Abstract

The invention discloses a loop self-regulation method of a satellite navigation receiver. Judgment and steps for optimizing loop parameters are increased on the basis of keeping original tracking loop structures of the receiver, and loop orders and noise bandwidth can be automatically adjusted according to carrier dynamic information. The method does not need to add a complete inertial navigationsystem additionally.

Description

technical field [0001] The invention belongs to the technical field of optimization methods for tracking loops of satellite signal receivers, and relates to a method of using the output information of a three-axis accelerometer chip as a judgment basis for optimizing and adjusting loop parameters, so that the tracking loop can independently adjust its own order and bandwidth Tracking loop performance optimization method. Background technique [0002] Since the introduction of satellite navigation technology into our country, its application fields have been continuously expanded, and there are great application prospects in civil, military, aerospace and other aspects. When the carrier equipped with the software receiver has high dynamics, the relative velocity, acceleration and acceleration rate between the receiver and the satellite will cause the received satellite signal to have a large and time-varying Doppler on the carrier. Frequency shift, when the Doppler frequency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/23
Inventor 黄隽祎李荣冰刘建业谢非
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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