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Beidou satellite navigation receiver, and method and device for improving tracking sensitivity of same

A navigation receiver and Beidou satellite technology, applied in the field of navigation, can solve the problems of short length and low tracking sensitivity

Inactive Publication Date: 2017-01-18
ARKMICRO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of Beidou satellite navigation receiver and its method and device for improving its tracking sensitivity, aiming to solve the problem that the maximum length of the integrating-clearing device in the prior art is only a bit period, and the length is too short, so the tracking sensitivity is relatively low. low problem

Method used

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  • Beidou satellite navigation receiver, and method and device for improving tracking sensitivity of same
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Examples

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Embodiment 1

[0026] see figure 1 The method for improving the tracking sensitivity of the Beidou satellite navigation receiver provided by Embodiment 1 of the present invention comprises the following steps:

[0027] S101, after the bit synchronization is successful, after the first millisecond of the bit period is determined, the I branch value and the Q branch value in each bit in the continuous n bits are respectively accumulated to obtain n groups of bit accumulation values, and n is greater than Or an integer equal to 2.

[0028] Assume that the numbers of the I branch value and the Q branch value of the NGEO satellite are I1, Q1, I2, Q2, ..., I20, Q20, I21, Q21, I22, Q22, ..., I40, Q40, ..., I20xn, Q20xn, Wherein, I20xn and Q20xn represent the 20th I branch value and Q branch value corresponding to the nth bit respectively, and I1 and Q1 represent the value of the first millisecond corresponding to the first bit.

[0029] Assume that the numbers of the I branch value and the Q bran...

Embodiment 2

[0042] see figure 2 The device for improving the tracking sensitivity of the Beidou satellite navigation receiver provided by Embodiment 2 of the present invention includes:

[0043] The accumulating module 11 is used to accumulate the I branch value and the Q branch value in each bit of the continuous n bits after the bit synchronization is successful and determine the first millisecond of the bit period to obtain n groups of bit accumulation values , n is an integer greater than or equal to 2;

[0044] Compensation module 12, for multiplying the I branch value and the Q branch value in n groups of bit accumulation values ​​by 2 respectively n or 2 n-1 Bit compensation value, get 2 n or 2 n-1 The bit accumulation value after group compensation, each bit compensation value includes n bit compensation values ​​corresponding to n groups of bit accumulation values, and each bit compensation value is 1 or -1;

[0045] FFT operation module 13, for respectively pairing 2 n or...

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Abstract

The invention is applicable to the field of navigation field and provides a Beidou satellite navigation receiver, and a method and a device for improving tracking sensitivity of the Beidou satellite navigation receiver. The method comprises the steps of: accumulating an I branch value and a Q branch value in each bit among continuous n bits separately to obtain n groups of bit accumulated values after successful bit synchronization and determination of a first millisecond of a bit period; multiplying the I branch values and the Q branch values in the n groups of bit accumulated values by 2<n> or 2<n-1> kinds of bit compensation values separately, so as to obtain 2<n> or 2<n-1> groups of compensated bit accumulated values; performing m-point FFT operation on the 2<n> or 2<n-1> groups of compensated bit accumulated values separately, so as to obtain 2<n> or 2<n-1> groups of FFT results, wherein each group of FFT results includes m values; finding out the maximum value of each group among the m values of each group of FFT results, so as to obtain 2<n> or 2<n-1> values; and finding out the maximum value of the 2<n> or 2<n-1> values, and confirming the group in which the maximum value exists as a real bit condition. By implementing the Beidou satellite navigation receiver, the method and the device, the maximum length of an integrator-eraser can be increased from 20 or 2 to a multiple of 20 or 2, thereby improving the tracking sensitivity.

Description

technical field [0001] The invention belongs to the field of navigation, and in particular relates to a Beidou satellite navigation receiver and a method and device for improving its tracking sensitivity. Background technique [0002] Both Beidou satellite navigation system and GPS system are global positioning systems, which play an increasingly important role in today's life, occupying a very important position in the fields of navigation, positioning, timing, and speed measurement. At present, China's Beidou satellite navigation system is developing rapidly, and the navigation receivers of the Beidou satellite navigation system will become more and more common. Navigation receivers usually include: antenna, radio frequency module, baseband signal processing module and other application modules. Among them, the main functions of the baseband signal processing module include searching for satellites in the sky and demodulating the correct navigation message, and generating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/24G01S19/37
CPCG01S19/24G01S19/37
Inventor 严卫健刘俊秀王雅君石岭
Owner ARKMICRO TECH
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