CA2049818A1 - Cellular position locating system - Google Patents

Cellular position locating system

Info

Publication number
CA2049818A1
CA2049818A1 CA002049818A CA2049818A CA2049818A1 CA 2049818 A1 CA2049818 A1 CA 2049818A1 CA 002049818 A CA002049818 A CA 002049818A CA 2049818 A CA2049818 A CA 2049818A CA 2049818 A1 CA2049818 A1 CA 2049818A1
Authority
CA
Canada
Prior art keywords
signal
cellular telephone
signals
navigational
cellular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002049818A
Other languages
French (fr)
Inventor
Ralph D. Darnell
Claude C. Douglas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BI Inc
Original Assignee
CAE Link Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27423939&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2049818(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to US07558651 priority Critical patent/US5043736B1/en
Priority to AU82677/91A priority patent/AU645114B2/en
Priority to EP91307697A priority patent/EP0528090A1/en
Application filed by CAE Link Corp filed Critical CAE Link Corp
Priority to CA002049818A priority patent/CA2049818A1/en
Priority to JP3215469A priority patent/JPH06186318A/en
Publication of CA2049818A1 publication Critical patent/CA2049818A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0027—Transmission from mobile station to base station of actual mobile position, i.e. position determined on mobile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/22—Status alarms responsive to presence or absence of persons
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18545—Arrangements for managing station mobility, i.e. for station registration or localisation
    • H04B7/18547—Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station
    • H04B7/1855—Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification
    • H04B7/18552—Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification using a telephonic control signal and a second ranging satellite
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S2205/001—Transmission of position information to remote stations
    • G01S2205/008—Transmission of position information to remote stations using a mobile telephone network

Abstract

ABSTRACT OF THE DISCLOSURE
The invention comprises a portable locating unit useful both as a cellular telephone and portable global positioning system that provides latitude and longitude information remotely to a base unit display. The system includes a small hand held receiver that receives signal from a satellite global positioning system and timing and computing circuits to provide location information signal. The hand held unit also includes a modem and transmitter to a cellular telephone network which is connected to the base unit computational system and display. The location of an individual or object can thus be determined at the remote station through the use of the cellular telephone network.

Description

SENT E~ LlN H~LE`,! 1`1CH~7L : 8-19-91 ~:15~ 305522DS07-3D13 5t~3 g8~9 ; t~

~ hl~ imrsntlorl relat~s ~o ~ ~y~t~ or a~0r~in~ng th~
lattt~uds~ ~nd longlt~ or ~n ln~ivldu~l o~r ob~3a~ a re~uots l~cae~on and tr2lnsn~i~ting in~or~ati :3~ to a ba66 opera~lon u~ing a r~n~ k c~r xingular por~abl$ pe:r~30nr~ unl~ that ~bodi~ q c~lluls~ tel~E~hona netuork ln ~:on~unct~c~n ~it~l ~ satellite na~ig~tic~n 6ySt~ll, and ~;peci~.cally ~o a han~-h~l~ locating unit ~1 at Can 6e~e both a3 a c llul~r ~lephone and a p~rta~le globular posit~on~ng ~ystem to prov~de l~ ud~ arld lon~ituda in~ aation for display a~ a b~S3 un~t.
2. D~scri~tiqn ~ ~h~ ~1~: aE:!~ . .
~ hè prlor a~t show~ a plQehora 4g~ 8y~ tQmF~ fo~ loo~ting indivi~du~l vehicl~a9 rolati~re to ~ c~ntrAl g~lon. U.S. Paten~
4,70~,76~, lssued to Ra~ux on Oc~ob~l3r 2~, ~ga7 ~ho~rs ~ llrQhi~le ~oni~oring C~ystem that use~ Wo~ld ome~qa Metwor~c ~nd a v~hlcl~
carried rocQiver to provide approxlmatQ coordinate ~o a central loc~lon. U. S . Pat~n~ 4, ~g7, 642, l~sue~ o Di~ulo ~t al ., ;rAnuary 30, 19~0, show~ a m~t2-od ~or m~nitorir~g t~ atus; a~ ~ ~ull:lpl~
p~r~ ~ehicle (~uch aB an eiqh~een wheel t~ck) ~nsl it~ cargo carrlor through I th~ u~e o~ sat~llit~a and an earth ~tatil~n.
U.s. P~t~3nt 3,56~,161, ~s~ued tt~ Xn$ck~31, Harch 2, 1g71 s~o~s al vehlcl~ locator . y2;t~m w~ h employ~ a plural$ty o~ ~en~or st~t~on~ and a central ~tation. U. S . Patan~ ~, 791, 57a, ~su~d to ____ _ bENT ~ 1~Ll~ H~LEY ~l~H~L ; ~-lg-Yl ~:15QM ; ~0552~507~bi-` 5b_ ~ J

G~an ~t al., Da~ r 13, 19~8, ~hc~da a locatl~g 6~y~ ua~
the LORAN-e ~yf~t~ ~or po~ n~rlg lnfor~ion~ U.8. P~nt 4,891,7~ sued to G~ay, J~nuary 2, 19~0~ ~h~ a zl ~y~ta~ ~c~r upd2lting a d~ cd ~ap c O~Dparing 3~uwn ~nc~ un~.nobm ~n~e~r~ection~
in con~unctlon wlt~ a navlga~icnal tr~ck1ng uni~.
Th~ uni~3~ de~scrib~d in t~ pric~r ~r~ arg co~pleY in o~eratlon and do not utlli2e a7~ila~1~c G~llul~r tel~phona t~chnology. ~h~ l?r~ nt invention ov~rcoma~8 problgm~ Df ~h~ prior art ~y previd~ng a norl-complex port:al~l~ hand-~el~ urli~ th~ ~a~
c~c-ss country capa~llity and vars~ y ~or u gE3 aB a ~egular c~llular telephone in conjunc:~ c~n w~t2~ a p~eci;e navlgational l~c~ting sygt~3m that can ~ conYeni~ntly and ea8ily carr~l ed ~or t~an6mi8S~on and di8play o~ po~tion inforsDa'cion at ~ b~ locz~ion.
gY ~ 11 ~B S~l~a~ZIt 1~1 A global poRi~ioning sy~tem e~pec~ally adap~ed for use ~y an lndividual or o~ ec~ ~ha~ ~n~ludeg a portabl~ rl3mot~ uni~ and a ~ase infonnation di~pl~y unit. The po~table remot~ unit incluàe~ an R~ rece~ver clrcuit for lll Q with a sa~ellite ~a~igation ~3y~ eDI~ a croprc~ces~or ~or analy~inS~ cod~ ~ignals, csllul~r phone modem circuits for ~rans~itting encoded slgnal8 ~o tl~e ba~e unit and a tlme of day clocJc. The ~ase unit ~nclud~s a computat~ on~l ~y~ for d-coding positlon da~a and a ~IFisual di~play deYica for pres~ntlng t~e remot~ unit ~nap coordlnat~
~ rhe portable r~ote uni~ $o compris~d o~ ~our :gU~ ly~t8m8 ~hich lnclude tt~e global po9it~0ning ay~lteDI RF l~Ln ~and an~nn~ and r~celv~r ~h~t r~C~3iY~ lgnal~ ~rom a plural~y of exi~s~ing -ENT fi` :~"4LI~ HH~` r~cH:lL : o 19 9~ ~: 161~ 3e~55~2~5~7~c~l~ Sl~ S9 ~ 5 14~8 ~L-t~lllt~. A ~icrop~ ot~ u~ ccm~pu~8tlon~1 ~yst~
t2~t r~cai~ aa outpu~ ~ro~ gn~ os!lu~t9r ln the ~;PS
rQ 3:eiv~r . T~l~ ce~ntral ~lmi~ c~ r~or ac:6u~a~o tl:~ o a~y haa C~UtpUtE~ connecte~ to ~he CP~ demo~ Dr ~ ,h~ aroproc~3 E;or ~ T~e GP$ raceiv~r g~neratQ~, its Ow~ eph~me~riB d~tz~l c~lled ~P~udo ~nd~
and a C~:)dB traln ~hat ~atc~h8~ ~e ~ e~ cod~ exactly. Tn~
Ps~udQ Ran~om Code i~ gener~!lted at t~a ~ time a~ t~e ~ell~te c~des are recelved. Th~ rac~.~,v~d ~rain oP pul~e~ ~ro n ~ sa~llit~
n ma~c~hQd w~ t~ ~he P~udo Ra~dom Cod~ ~co p~ovido a time dl~ference bc~ween ~;atellite tim~ and the Ps~udo Rando~ Code geherAted timQ wh~ ch provide~ r ~atellit~ rang~. Th~ inPor~ation ~a' trl~n ~3tored ~n ml3mory ~nd pr:r~rid~d tc~ 2a cellular ~elsphon~ mods~
elnd tran~m~tter ~ox trangml$ ion t:hrough ~ha c~llular 'c~lephon~
sy~te~ .
Th~ ba6e lanit, whlc~ r~celve~ and s~oordinatss 'ch~
l~cation3 of v~r~ou ~r~onnQl a~ ~he re~note~ loca~ion~, includa~ a co~Dput~ti~n :l~y6telQ ~or decodlng t}~e pc~g~tion datA trnn~ ro~
tho remotR unlts thro~gh th~ C811Ular telaphon~ E~y~t~m. The ~ase un~t uses a computer ttl~t $nclude~ 3ua~ di~pl~y de~i~e sl~o~ing a D~aæ upon ~hich thel dacod~d position dRta will be u~ed to ~bo-~co~rdinate~ in la~itud6~ and longituds o~ Qach remote urlitO
The rhm2~te uni~ in one con~gura~ n may be a amall hand-he~d unlt uYing batte~y power t~a~ includes GPS hslix ant~nna Ior r~ iY$n~ ~atell~te ~3ignal~ and a cellular ~Int~n~ a :e~r tran~m$c~i~n of' the code~ po~itlon information ~ o c~l~ular t~leph~o y¢teD~.
T~ remot~ unit could ~l fi~ be con~i~url3d t,o use electr1eal power - ENT i3~ l~L ! i`J HI~ILE',' l lCH~L ; ~ Yl D 171~ 055'~ 7D507jDl _ 'D_ ~ DI=I ; # D

f~o~ a ~hlc18.
~ en u~ln~ t~ p~e2~n~ ln~on~lon 1~ ou~ not~d that t~ lnvelltion combin~ an ~xl~lng global naYigz~ on~l p~itloning Sy!8tRl~ ~x:ou91~ U~ at~lllt~2s, cRllulz~r talephon~ ~echn~lo~y, camput~r ~nd ~ncd~ .n~terf~c~ u~ nd cll,rr~od un~ lf c~ntain~d, T~le romc>~ce uni~: ~nclude~ pec~ aode~ 3ys~em wh~ch ~uld usQ, in one ~xa~ple, E~ll 202.2~ Prc~l o~ l wit~ou~: th~ use o~ a dial tone, in ordgr to ~ransfer po~Sit~on data ~r~m co~puks~c ~e~nory to tlle c~llular phun8 gy~tç~m. ~n~ ~and ~eld un~L~ al~o include~
f~e~uency 6hif~ circuitry built ~ithin and il~ one em~odiment ~ay use a B~UD rate o~ 1200 ~itq psr ~econd.
It io ~n ~ ect of this lnvention to provid~ a hand held "man pack un~t~ for u~e by an 1nd~ dual or 0~3~e~ to provide gec~graphical po~itit~ning ~n~or~at~on such as la~tude and longitUdQ
f~o~ re~note ~ltQ t~ a ba!;e unit u~inS~ c~llul~r t~ephons m~t~odology .
It i~ anothor obiect o~ ~h~L3 in~ ntion to provid~ ~
rel~tiv~ly small pc~r~abln hand held un~ a~ csn proYida qQograp~lcal po~itioning information t~roughout ~h6l~ glob~ to a b~
un~ ~avlng a dl~play of t~e ge~raptlical loc:~tion on a ~ap.
It is anothex object o~ th~ inYention ~o provide a lo~
cc~st, r~3adily available global po~ ioning ~y~m for use by individu~l~ or ob~ ect~ a~ remc~t~ loc~tion~ to pro~id~ geographical po~it~oning in~ormatlon o~ tlle ln~lvldual~ or ob~ects ~Q a ba~s ~tatil~n u~lnq existing 621~allit~e and ce~ lulax t~leEi~hona technologles .

.~

8ENT B','~ LlN H7LE`,' ~l0H~L ; 8-19-91 ~:177M ; _055226507~613 56~ 9869 ;~ 7 In ~GCDrdanCI~ ~li~a th~ ~ ot~r ob~ ta app~rant ~er~ln 3~ter, ~h~ ~n~an~ vanelon ~ n~ ~ ds~c~i~e~
with E~artlcu~ar re~renc~ h~ ac~o~paryi~ dr~lnq~.
~R~ B~C~S?~IO~ 03" ~DII DR~
Fi~ur~ a basic ~ch~ma~lc dlagrs3~ o~ ~e ~y~t~
ac~:~rdlng to t219 inventlon.
Fisluri~ 2 ~hows an ad~ n~l ~chE~a~c d~agram o~ th~
bas~c inverstion.
Figur~ 3 ~ahows a ~c~a~1 c c ~rcu$t diagrsm of ~hQ r~mo~
ur~it us~:d in ~ pre~nt invontlorl.
Figur~ 4 6how~ a bl c~ck d iagram ~howing ths ba~lc circuitry th~ ~emots un1 t.
Figur~ 5 s~ow~ one possi~le con~iqur~tion o~ a rer~o~e uni~
in a pe2-spective viaw.
R~D ~BOD~ O~ $~ I~2~Ioal Re~ç~rrlng now to ~igure 1, t~e invention ~ 6hown which u~es s~gnal~ fro~ satG~ s~ S~l, S~2 ~nd SV3 which are tran~n~it~ed ta th~ r6~note unit lO ~avîng a ~ rS~ antenn~ la ~or r~cei~Jing ~
signals ~r~ tnQ ~atelli~es an~ ~oc~n~ an~nn~ 14 ~or tran~it~ing t~ approprlat~ ~ignal~ to a cellular ~le:p2~one ~y~tem 16. ~
c~llular telephon~ ~y~e~ ~h~3n pr~v1de~ ~he p~ope~ ~lgnAls to the b~e unit whe~upon ~ inPonna~ion 1~ ~r~n~go~d in~o ell di~splay.
Figur~ 2 ~nDws tng ~A~O unit wh~oh inc~ude~ a c:o~puter lB cc~nn~ d to ~ vl~ual dl~play ~0 ~hich ~ provid~ th~ apprs~priat~3 lat~tude a~ longltuds loc:a~ion o~ the r~mo~ unlt 1~ on th~ di~pl~y map.
Otr~r~ he inven~ion i~ colapr1s~ed o~ t~e rQDote unit l~, ~-NT Ei`.'~ HLlli HH~E`.' r1~HHL ; B--19~ : lciQil; ~0~52~51~7ic11--` 5~ 9 ; ~

a e~llular pnl~na ~yEIt~ and t~ ba~ unl~ 18~ ~o ~o~a un1t 10 lnrludQ~ an R~ a b~nd rxce~ r Po~ ~h~ glo~as 1 po~l~lor ~ng ~yotas~, a computal:ion~l ~y~e~ c:omprif~ og 2~ .er :~proe~ D;or, ~ e~llular t~lephono and ~ ~pec~al t~ pt~0na mode~ ~y~ . Th~ ba~ unit lB la campr~e~l o~ a G~ utat~on~ yg~e~ 18 ~r ~eoding p~ on ~ta rqeeiv6~d ~rom r~3mo unitrs and inelu~e~ e~ vl~sual dislplay 20 v~lc) pre~ents tlnQ rem~t~ un~.~ map coor~.inat~ on a map dl~play.
R~f~rring no~ to Figure ~, a res~o~ ur~ .0 is ~novn comprised o~ the hel~x L band an~enna 1~ conn~c~d to ~18 global p~s~t~ oning Sy8t~m receiver cirCui~s 22 haYlng an output to mlcroproces~or circui~s 24. T~e ou~put of t'llQ l~cr~pxocessor circu~tR 24 i~ conn~cted to ~;~; 'c.~ ; 2~ and to ~h~ c~llular telephono clrcu~ ~:8 28 ~ho~3e ou~pu~ goes t~ antenna 14 ~or transmis~1on to a c~llular telephone rQceiv~r.
ReI erring now to Fi~r~ 4, a moro detailed dia~ram o~ the remote unit i~ shown~ ~n~enna 12 rece~.ve~ f~n L band Ellgnal ~c~m the glc~l~al po~tionlng ~y~te~ and satellltQ netvor~ and rec~iv~r 30 wl~ich i6 sent to a dsmodulator ~ an~ to ~h~ ~lcroproce~isor 4 far G40P tGeo~6~tric Dillu~lon o~ Praci~on) calcula~ons. q'~le micr~proceRsc~r 34 al~o rec~3iv~b~ c~rr~c:t ~ of day sigr al~ ~r~
c~ntral tlmlnq 4a. T~l~ ~icroproGe~390r 34 generaee8 ps;eudo r~ndom code ba~;ed s~s~ exac~ly tho game t,i~ ge ~h~ aatellite 2;lgnal. Tha p~eudo random code tr~n ~harl ma~cha~ 8 2~at~111te code ~xactly.
T~s r~ceived traln pu~ 5 ~ro~ t~e ga~cell 1 tQ~ ar~3 then m~tched with t~e psQudo code train. The dif~renc~ ln t~e be~w~3en th~ ~a~llit~
time and p~audo co~e g~nerated. tlmd~ giva9 the e~a~,Qlli~g range~ ~æsed --El`IT Ei'~ LIN HhLE`,' li~H~L ~--19--91 ~
. ~ , ~05522D507it~l_ 5C/~ gl~s69 ; # Y

onl ~liat~neo ~ v~loci~y ~ o~lon 1~ torsd lr~
ra~doTfl acc~ m~sQory ~RAM) 3 6 wh~ c~ connec1:~d t~ t)~
~na~ory co~croller 40.
Onc~ ~b3 a~gnal ~ praC~3Q~ an~ gt~r0d in t~ R~ 36, th~
~n~c,r~ation c~n b8~ tr~ne~ rr~d throug~ ~o~y controll~r to th~
phDn~ modea 44 ~rom w31ich it; ~9~ sen~ te~ ~he c~llular tr2m~ml~tar 46 ~r ~endlng t~ inPe)rma~io~ ttlrDuqh ant~nn;3 1~.
Th~ re~not~ unit alao inc:lu~ a cellul~ar tal~phone r~eiver 48 ~or re::e~vlng da~ lncludlng a c~coder 50 which conn~cts ba~k to ~h~ memory con~rol and central ~iming to per~i~ con~rol from tn~ base unlt via t~e c,~ u~ar telephon~ E~y23~ . Re~rring ~ack to Fi~ure 2, onGe ~cho si~nal 16 ~nt ~xo~ t~e re~note uni~ ~hr~ugh th~
CQllular p}~one system 16, and it ~ 9 re3CEllY~ at a CPU at tha baaf~
unit, the computer ~8 at ~he b~E~e unit will ~hen decode ~he ~gnal ~Ind tranalate it ln~o infor~nation ln ~ ~uitabl~s displP,y 20 whic~
wl'l 1 sht~r kh~ geos~raphical coord1natgg o~ lati~ude and longi~ud~ ~n a map on tl~ display~
~ eerr~ng no~ to Figure S, a po~si~lQ con~lguration of ~2~e rqmotR unit is a~lo~n w~llc21 includ8~ ~6 helix ~ntenna ~2 for r~cei~ring ~ChB glob~l pos~itit~ning Ry te~ ~ign~l~ and t~le cellular ar~tenna 14, all o~ whlch is mounted in a ~3m~ll rs~ctangul~r hou~3lng 52 which cc~uld b~ di~aen~lonally ~iz~d to bo hand held. Th~ remo~e ur~it could al60 be conf igured in a vehlc:le ~o u~c~ v~hicla power, and a~ su~, lf us~d ~or surveillance or ~ili~ary uce, th~ an~nna~
c~uld ~o hidden.
~ he ~ n~rentior, a~ ~e~cri~ed prov~es for ~a partabl~ hand -.ENT Ei~':l`lQLiN HQLE~ 1CHQL : 8--19--91 ~: 19QI`1, ~055~6507~ 5~` ~8~9 ;#10 % ~ 3 A ~
c~rrisd car ~ ahlclo ro~o~o unlt ~ 1Q~8 ln~vl~ua~ r ob~ct~ ~o locat~ ~ro~ a ba~a sta~ on ~ny~r~ ~n ~ch~ ~Yorls!l u~ n~ ~ non ~mplex, rel~tiYely inexpan8iv~ ~6y6~ halt e~p~.oy~ curr~n~ a~allul~r p~Dne technology.
The ~ nstant lx~vgln~ion llao ~g~e~ ~ho~n an~ cri~0d here~n lnl what ~ cong~d~red tD be~ th-~ ~no~ pract~c~al and p~ef~rred embodiment. It i~ reC~gni~ , ho~vQr, ~ha~ ~epa.rtUre~ may ba made there~rom ~ith~n the ~cope o~ th~ $nvention an~ ~h t ol~ u modification s~ill occur ~c~ 8 peraon 6kill~d ln t~a ar~.

Claims (4)

What I claim is:
1. A cellular position locating system for locating the geographical coordination using a portable hand held remote unit comprising:
receiver means for receiving navigational signals from satellites in orbit about the earth;
signal processing means for demodulating the satellite navigational signals;
means for generating a pseudo random code;
time means connected to said demodulating means and said signal processing means;
means for generating position information signals by comparing the time difference of the navigational signals and the pseudo random code signals;
means for converting position information signals into cellular telephone signals;
cellular telephone signal transmitting means;
cellular telephone for transmitting signals via cellular telephone into the conventional phone lines;
base unit means for processing telephone signals received from said cellular transmitter;
said base means including means for decoding the received signal for determining geographic location position data; and a display means connected to said base unit for displaying the geographical coordinate information.
A method for locating a person or object at a remote location from a base location comprising the steps of:
(a) receiving navigational information signals from a satellite location;
(b) generating a pseudo random code at the remote location and comparing it to a known time signal relative to the satellite navigational signals;
(c) providing cellular telephone modem signal processing means for transferring the navigational information into a cellular telephone signal;
(d) transmitting the navigational signal information to a cellular telephone network;
(e) receiving the navigational signal information through a cellular telephone to a central processing unit;
(f) means for displaying the signal received at the base unit.
3. A cellular position locating system to provide latitude and longitude information from a remote site to a base site comprising:
a portable housing sized to be hand held;
portable navigational satellite signal receiving means mounted in said housing;
timing means to provide time of day mounted in said housing;
signal processing means having an input connected to said navigational satellite signal receiving means and said timing means to provide an output signal representing the geographical location of said satellite signal receiving means;

telephone modem means connected to the output of said satellite signal processing means;
cellular telephone signal transmitter connected to said modem and mounted in said housing;
cellular telephone signal network for receiving and transmitting cellular telephone signals; and a base unit connected to said cellular telephone signal network for receiving cellular telephone signals and for providing a display that represents reographical positions of said navigational satellite signal receiving means.
4. A cellular position locating system as in claim 3. including:
a cellular telephone signal receiver mounted in said housing;
memory means mounted in said housing and connected to said cellular telephone signal receiver and said signal processing means to provide control to said signal processing means.
CA002049818A 1990-07-27 1991-08-26 Cellular position locating system Abandoned CA2049818A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US07558651 US5043736B1 (en) 1990-07-27 1990-07-27 Cellular position location system
AU82677/91A AU645114B2 (en) 1990-07-27 1991-08-21 Cellular position locating system
EP91307697A EP0528090A1 (en) 1990-07-27 1991-08-21 Cellular position locating system
CA002049818A CA2049818A1 (en) 1990-07-27 1991-08-26 Cellular position locating system
JP3215469A JPH06186318A (en) 1990-07-27 1991-08-27 Cellular ranging system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US07558651 US5043736B1 (en) 1990-07-27 1990-07-27 Cellular position location system
AU82677/91A AU645114B2 (en) 1990-07-27 1991-08-21 Cellular position locating system
CA002049818A CA2049818A1 (en) 1990-07-27 1991-08-26 Cellular position locating system
JP3215469A JPH06186318A (en) 1990-07-27 1991-08-27 Cellular ranging system

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CA2049818A1 true CA2049818A1 (en) 1993-02-27

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CA002049818A Abandoned CA2049818A1 (en) 1990-07-27 1991-08-26 Cellular position locating system

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US (1) US5043736B1 (en)
EP (1) EP0528090A1 (en)
JP (1) JPH06186318A (en)
AU (1) AU645114B2 (en)
CA (1) CA2049818A1 (en)

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EP0528090A1 (en) 1993-02-24
AU645114B2 (en) 1994-01-06
US5043736A (en) 1991-08-27
AU8267791A (en) 1993-02-25
US5043736B1 (en) 1994-09-06
JPH06186318A (en) 1994-07-08

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