|
Match
|
Document |
Document Title |
|
|
5394332 |
On-board navigation system having audible tone indicating remaining distance or time in a trip
The present invention relates to an on-board navigation system which continuously informs a driver of the degree of approach of a vehicle to a destination by outputting a sound suited to the...
|
|
|
4701760 |
Method for positioning moving vehicles and exchanging communications between the vehicles and a central station
A method for monitoring vehicles from a central station, consisting of obtaining the approximate coordinates of each vehicle from signals transmitted by stations of the world omega network and...
|
|
|
4680590 |
Position finding system
Three fixed reference stations having known positions comprise Omega receivers. Phase measurements made at all three stations are assembled at a master station, utilizing landlines or radio links...
|
|
|
4672383 |
Craft guidance system
A craft guidance system 200 has signal transmission stations AB, CD, AC operable to provide three intersecting hyperbolic lattices 21, 20, 120. One transmission station pair AB provides a moving...
|
|
|
4276552 |
Automatic synchronization for receivers of a navigational system
An essentially worldwide navigational network (Omega) operating at a very low frequency in an internationally allocated navigational band in the electromagnetic spectrum is provided with a receiver...
|
|
|
4191958 |
Radiolocation with respect to an Own station, using Omega signals or the like
Radiolocation, with respect to an Own station, of a transmitter-equipped Other station by triggering the transmitter to transmit identification messages in response to timing signals from a...
|
|
|
4138680 |
Selective sampling method
In an Omega receiver, for each of the Omega frequencies (10.2 KHz, 11 1/3 KHz, 13.6 KHz), a desired frequency is isolated by selectively sampling received signals at predetermined intervals. The...
|
|
|
4134217 |
Omega simulation
This invention is a system for teaching the principles of Omega navigation and the operation of Omega receivers, which system comprises a simulation computer that provides to an Omega interface...
|
|
|
4024383 |
Method and system for navigation employing incremental range difference
A navigation method and system suitable for highly accurate all-weather navigation of vehicles such as ships and aircraft. An initial position of the vehicle relative to a plurality of known points...
|
|
|
4015262 |
Digital filters for obtaining quadrature components of a periodic signal
A digital filter for obtaining quadrature components in a periodic signal, such as the recovery of phase and/or amplitude of two or more periodic signals through coherent digital summation...
|
|
|
3997902 |
Transmission of radio navigation phase corrections
A method of and apparatus for differential mode navigation in a sequential system of radio-navigation by phase reception. A transmitted amplitude-modulated radio-navigation carrier wave is phase or...
|
|
|
3996515 |
Method for frequency cross-coupling of channels in an Omega Navigation receiver system
This invention relates generally to radio navigation receivers and particularly to multiple frequency phase tracking receivers in which phase information received from a network of transmitters,...
|
|
|
3969727 |
Position detecting device for omega receiving system
Position detecting device for use with omega navigating apparatus which includes a receiver for receiving two omega signals from different stations, a synchronous generator for producing first and...
|
|
|
3950752 |
Navigation receiver system for synchronizing to noisy, asymmetrical signals
In an Omega receiver a phase detection system operative on both rising and falling edges of a hard limited, received Omega signal to compensate for random noise and asymmetries in the hard limited...
|
|
|
3941983 |
OMEGA-VOR/DME positional data computer for aircraft
Apparatus for combining positional data from OMEGA and VOR/DME radio navigation systems to provide computed positional data corresponding thereto includes a circuit for generating an OMEGA...
|
|
|
3936762 |
Digital phase-lock loop systems for phase processing of signals
A digital phase-locked loop in which an error signal representing the difference between the phases of an input signal and an output signal is converted to a digital signal having a time-varying...
|
|
|
3936763 |
Null input OMEGA tracking filter system
Tracking filter apparatus for determining the relative phase of synchroni CW navigation systems. The apparatus generates a square wave signal the phase and amplitude of whose fundamental sinusoidal...
|
|
|
3928852 |
Radio navigation system and apparatus
A high-resolution compatible coastal confluence radio navigation system includes two local stations cooperable with a distant station of an Omega network or the like. The local stations, which are...
|
|
|
3900876 |
Automatic omega signal pattern synchronizing system
An automatic omega signal pattern synchronizing system in which signals above a certain level are detected from received signals of omega signals transmitted in a time divisional manner; a signal...
|
|
|
3896443 |
OMEGA NAVIGATION RECEIVER STATION PAIR SELECTION AND LOP DISPLAY SYSTEM
In an Omega navigation receiver, a system for providing four station phase comparison using a single time-shared phase difference detector and providing flexibility in the selection of Omega...
|
|
|
3890619 |
Omega navigation receiver apparatus
Receiver apparatus for determining the phase relationship between multiple Omega signals of the same frequency which are transmitted successively by different Omega transmitter stations, the...
|
|
|
3889265 |
Station distinguishing system in omega receiver
A station distinguishing system for an omega navigation system which includes signal receiving means, measuring the duration of each received signal and selecting the signals having durations...
|
|
|
3883874 |
System for providing a reference frequency source
A standard frequency package for radio communications and navigation and comprising VLF transmissions as a source of standard frequency. Commuted signals at the same frequency are utilized without...
|
|
|
3852750 |
NAVIGATION SATELLITE SYSTEM
A long range navigation system and method for determining the position of mobile vehicles using synchronous satellites. Three or more synchronous satellites alternately relay a radio frequency...
|
|
|
3852751 |
DATA HANDLING RECEIVER AND PHASE TRACKING
A receiver for use with the Omega world-wide navigational system employs pairs of digital phase lock loops, all referenced from a common multi-phase pulse train, for tracking the phase of...
|
|
|
3838426 |
ELECTRONIC AMBIGUITY-REMOVAL DEVICE FOR PHASE MEASUREMENT RADIONAVIGATION SYSTEMS, MORE PARTICULARLY FOR THE OMEGA SYSTEM
An OMEGA phase-measurement radionavigation system includes an ambiguity-rval device, in which a correction signal for correcting velocity differences at different frequencies is added to a...
|
|
|
3803610 |
ISO-PHASE NAVIGATION SYSTEM
An Omega navigation system is disclosed which includes a relay station at a fixed location. The relay station includes a receiver for receiving the signals being braodcast by the Omega transmitting...
|
|
|
3796957 |
AUTOMATIC IDENTIFICATION AND SYNCHRONIZATION CIRCUIT
In a receiver an automatic signal identification and synchronization circuit is utilized to identify the transmitting station and to synchronize internally generated commutating gates with the...
|
|
|
3774211 |
METHOD OF AND APPARATUS FOR TRANSMITTING PHASE CONNECTIONS, IN PARTICULAR FOR THE OMEGA RADIO NAVIGATION-SYSTEM
In a sequential-transmission phase measurement radionavigation system, such s the OMEGA radio-navigation system, phase correction signals are transmitted by a network of transmitting stations to...
|
|
|
3761932 |
COMMUTATOR GENERATOR FOR RADIO NAVIGATION RECEIVER ALIGNMENT
A commutator generator for generating a plurality of station gating signals each having different gate time. A resettable binary counter provides output timing signals which are gated with the...
|
|
|
3696424 |
METHOD AND APPARATUS FOR VERY-LOW-FREQUENCY RADIO NAGIGATION
Disclosed is a method and apparatus for improving the accuracy of navigation by the Omega Navigation System. The improvement in the method of navigating by the Omega system relates to the detection...
|
|
|
3689925 |
RECEIVER FOR OMEGA NAVIGATION SYSTEM
A receiver responsive to a plurality of Omega Navigation System transmissions, wherein digital circuits effect all phase tracking functions and wherein a single phase tracking circuit can be...
|
|
|
3680115 |
VERY LOW FREQUENCY LOCATION FINDING SYSTEM
To display at a command post the positions of all vehicles in a tactical a, each vehicle receives two very low frequencies (VLF's) of an "Omega" system, and retransmits the phase information...
|
|
|
3680116 |
METHOD AND APPARATUS FOR SIGNAL DETECTION
A visual display is provided by juxtaposing indications of locally generated signals with indications of corresponding received signals. The locally generated signals and the received signals are...
|
|
|
3665469 |
APPARATUS FOR IMPROVING THE LANE RESOLUTION CAPABILITIES OF OMEGA NAVIGATION RECEIVERS
The invention consists of a system to improve the lane resolution of Omega avigation Receivers. By measuring the average phase offset of the 3.4 kHz signal from the 10.2 kHz signal due to...
|
|
|
3599212 |
VERY LOW FREQUENCY TACTICAL COMMAND SYSTEM
To display at a command post the positions of all vehicles in a tactical a, each vehicle receives three VLF's of an "Omega" grid of hyperbolic lines and retransmits the phase information thereof...
|
|
|
3573828 |
SYNCHRONIZATION INDICATOR
In order to synchronize a locally generated timing pattern in a receiver with a transmitted timing pattern as received, the strongest signal in the received pattern is separated from all others and...
|
|
|
3493971 |
OMEGA SYSTEM COMPENSATING FOR VARIATIONS OF THE TRANSMISSION MEDIUM
|
|
|
3560980 |
POSITION FINDING SYSTEM
|
|
|
3471856 |
POSITION LOCATION AND DATA COLLECTION SYSTEM AND METHOD
|
|
|
3452357 |
METHOD AND MEANS FOR RADIO-LOCATING A RADIO-RECEIVING STATION
|
|
|
3440535 |
PHASE LOCKED LOOP SERVO SYSTEM FOR DIRECT MEASUREMENT OF RELATIVE PHASE
|
|
|
3392389 |
Method and means for radiolocating a radio receiving station
|
|
|
3380056 |
Simplified omega receiver utilizing photo-responsive correlator
|
|
|
3303501 |
Radio location system with lane identification facilities
|
|
|
3206751 |
Electronic location and guidance system
|
|
|
2974318 |
Radio location system
|
|
|
2943319 |
Radio location system
|
|
|
2880413 |
Methods and apparatus for determining position
|
|
|
2828485 |
Radio location system
|