Method and device for weakening the influence of multipath on positioning accuracy of receiver antenna

A positioning accuracy and receiver technology, applied in the field of communication, can solve problems such as output positioning error

Inactive Publication Date: 2009-10-28
XIHUA UNIV
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretically, the receiver should converge to the position where the working area of ​​the code discriminator is zero, and the distortion of the autocorrelation function caused by multiple channels will cause the output positioning error, that is, under the direct path, the receiver converges on the delay of the non-direct path, and there is no direct path. The path will not converge to the sho

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
  • Method and device for weakening the influence of multipath on positioning accuracy of receiver antenna
  • Method and device for weakening the influence of multipath on positioning accuracy of receiver antenna
  • Method and device for weakening the influence of multipath on positioning accuracy of receiver antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The present invention is a method for reducing the influence of multipath on receiver antenna positioning accuracy, which adopts figure 2 The block flow chart of the module is realized, wherein, core processor 27 is by the TMS320C6454 of special-purpose digital signal processor Texas Instruments (TI) through the programming of processing formula (2)~(15), (17)~(20) to realise.

[0055] The specific operation steps are as follows:

[0056] In the present embodiment, the receiver 1 is a traditional spread spectrum intermediate frequency digital receiver, and the calculation method used in the digital signal processor 2 is as follows:

[0057] In the first step, the carrier tracking loop and the code tracking loop of the traditional spread spectrum intermediate frequency digital receiver 1 are closed after the frequency offset and code displacement estimation are completed;

[0058] The second step, the specific representation of the stage of obtaining signal data is as...

Embodiment 2

[0119] Utilize the concrete realization of above-mentioned method by device of the present invention:

[0120] Adopt traditional spread spectrum intermediate frequency digital receiver 1, the core processor 27 of described digital signal processor 2 can be made of TMS320C5X or TMS320C6x of Texas Instruments (TI), or be made of TMS320C5X or TMS320C6X series plus the hardware accelerator to partial operation , this example is realized by TMS320C6454 of TMS320C6X series, the data storage and update device 26 adopts GS832018 memory of GSI Technology to realize the data storage of maximum 2Mx18, the read and write control of memory data is realized by TMS320C6454, and the data update rate is 100 times / second.

[0121] The traditional spread spectrum intermediate frequency digital receiver 1 is provided with a data output interface 28, so that the data output interface possesses the ability to provide intermediate data. Interface 43, pseudo-random code lag output interface 44, compl...

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 method and a device for weakening the influence of multipath on the positioning accuracy of a receiver antenna. Under the condition that crude doppler frequency shift and code phase information are obtained, the method obtains advanced data, instant data and delay data of a local code generator, as well as local complex sinusoidal signals, product signal data between intermediate frequency signals received by a receiver and a local oscillator from a traditional closed loop expanding frequency intermediate frequency digital receiver; the data is sent to a digital signal processer to be processed; accurate multipath delay, multipath fading and phase estimation are obtained, then the estimation is combined with a local code of a receiving system, a code relative to carrier wave tracking loop and data of a carrier wave phase accumulator to calculate a value correction value of the codes and the carrier wave phase accumulator, and the data after being corrected is sent to a post processor and a user interface to be processed, therefore the positioning accuracy of the receiver antenna is enhanced. The device comprises a traditional expanding frequency receiver, a digital signal processor, a data output interface connected with the traditional expanding frequency receiver, and a data input interface connected with the traditional expanding frequency receiver.

Description

technical field [0001] The invention relates to the reception of a transmitted spread spectrum signal, in particular to a method and a device for reducing the influence of multipath on the positioning accuracy of a receiver antenna for distinguishing signal propagation paths, and belongs to the technical field of communication. Background technique [0002] In the process of using signal reception, such as receiving spread-spectrum signals sent by satellites, for position measurement and positioning, in typical cases such as GPS positioning systems, the multipath characteristics of the channels through which the signals pass will cause measurement and positioning errors. The impact of multipath on the positioning accuracy of the receiver antenna is mainly reflected in the distortion of the autocorrelation function of the pseudo-random spreading code. Theoretically, the receiver should converge to the position where the working area of ​​the code discriminator is zero, and th...

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
IPC IPC(8): H04B1/707G01S1/02H04B1/711
Inventor 黄勇徐红
Owner XIHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap