短基线定位系统中通用宽带应答器的设计与实现的中期报告.pdfVIP

短基线定位系统中通用宽带应答器的设计与实现的

中期报告

Abstract

Inthisreport,wepresentthedesignandimplementationofa

general-purposebroadbandresponderforshortbaselinepositioning

systems.Thesystemconsistsofarespondermodule,acentral

processingunit,andawirelesscommunicationmodule.Theresponder

modulegeneratesacontinuouswavesignalthatistransmittedtothe

centralprocessingunit.Thecentralprocessingunitprocessesthesignal

andcalculatesthepositionoftheresponder.Thewireless

communicationmoduleisusedtotransmitthepositioninformationto

otherdevicesinthepositioningsystemortoaremoteserver.The

systemhasbeentestedandvalidatedinalaboratoryenvironmentwith

promisingresults.

Introduction

Shortbaselinepositioningsystemsarewidelyusedinvarious

applicationssuchasautonomousvehiclenavigation,precision

agriculture,andlandsurveying.Insuchsystems,aresponderlocatedat

aknownpositionsendsasignaltoareceiverlocatedonamobile

vehicle.Thereceivercalculatesthedistancebetweenitselfandthe

responderusingthetimedelaybetweenthetransmittedandreceived

signal.Bycombiningthedistancemeasurementsfrommultiple

responders,thepositionofthereceivercanbedetermined.

However,thetraditionalnarrowbandrespondersusedinshort

baselinepositioningsystemshavelimitedbandwidthandare

susceptibletointerference.Toovercometheselimitations,wedesigned

andimplementedageneral-purposebroadbandresponderforshort

baselinepositioningsystems.Thisresponderiscapableofgeneratinga

continuouswavesignaloverawidefrequencyrange,whichcanbe

usedtomitigatetheeffectsofinterferenceandimprovetheaccuracyof

positionestimation.

Design

Thegeneral-purposebroadbandresponderconsistsofthreemain

modules:therespondermodule,thecentralprocessingunit(CPU)

module,andthe