Unlock instant, AI-driven research and patent intelligence for your innovation.

Satellite navigation signal analog multi-channel consistency test method and device

A technology of satellite navigation signal and test method, which is applied in the fields of national defense, military industry, surveying and mapping, satellite navigation signal simulation, navigation, and aerospace. It can solve the problems of reducing positioning timing accuracy and achieve the effect of solving channel consistency testing problems

Active Publication Date: 2014-05-07
NAT UNIV OF DEFENSE TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The delay error directly affects the receiver pseudo-range measurement, reducing the positioning and timing accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Satellite navigation signal analog multi-channel consistency test method and device
  • Satellite navigation signal analog multi-channel consistency test method and device
  • Satellite navigation signal analog multi-channel consistency test method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The traditional receiving test method uses a down-converter for each RF signal, and determines the input frequency of the down-converter according to the frequency of each RF signal, such as figure 1 shown.

[0011] The method proposed by the present invention adopts a down-converter. After the radio frequency signal is down-converted, it passes through a low-pass filter LPF, and then converts through an ADC, and then performs digital down-conversion DDC processing according to the actual situation of each channel.

[0012] The input frequency of the downconverter is determined as follows:

[0013] Assume that the input signals RF1, RF2, RF3, and RF4 have their center frequencies L1, L2, L3, and L4 respectively, and their bandwidths are B1, B2, B3, and B4 respectively, and the frequency bands are limited to (f L1 ,f h1 ), (f L2 ,f h2 ),(f L3 ,f h3 ),(f L4 ,f h4 )

[0014] Then the input frequency point of the down conversion

[0015] f ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a satellite navigation signal analog multi-channel consistency test method and device. The method adopts a same down converter, the input frequency synthesis of the down converter is determined based on the frequency point of and the bandwidth of the multi-channel radio frequency signal. The down converter carries out the AD sampling after changing the signal to be at a medium frequency. Each path is processed in the digital processing part. The method comprises digital down conversion (DDC), acquisition and tracking and the like. Usually, different down converters have different delays, which brings errors for the channel consistency test. The errors can be avoided by adopting the same down converter. Different processing on different channels are reflected in the digital part, and the delay caused by the digital part is known and controllable. Therefore, the channel consistency test problem of a satellite navigation signal analog source can be solved better with the method.

Description

technical field [0001] The invention relates to the technical field of satellite navigation signal simulation, and can be applied to the fields of national defense, military industry, aerospace, navigation, surveying and mapping, and the like. Background technique [0002] Satellite navigation systems are currently experiencing a variety of development trends. In order to utilize multiple navigation systems, positioning receivers have also begun to develop in the direction of compatibility. Simultaneous reception of signals from multiple navigation systems improves availability and position timing accuracy. The satellite navigation signal simulator can simulate the satellite signal received by the user in a static state, and has a wide application prospect in the test field of the user machine. The satellite navigation signal simulator is also developing in the direction of multi-system compatibility, which can simultaneously generate multi-system and multi-satellite navig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/23
Inventor 杨俊王跃科乔纯捷冯旭哲陈建云单庆晓
Owner NAT UNIV OF DEFENSE TECH