Quotables
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7936305 | System and method for determining attitude using spatial shift key (SSK) modulation signatures An attitude system that includes a radiating means which moves predeterminately through three-dimensional space, such that a cyclic Doppler is superimposed upon a transmitted signal; receiving this transmitted signal through a receiving means which moves predetermin... | 05/03/2011 |
| 7411548 | Reference beacon identification using transmission sequence characteristics A method and apparatus for encoding information in a reference beacon signal for use in a time-difference-of-arrival/frequency-difference-of-arrival (TDOA/FDOA) geolocation system. Information is encoded in the reference beacon signal using variations in the times a... | 08/12/2008 |
| 7408507 | Antenna calibration method and system A phased array antenna system includes an RF front end, a radome, and an optical calibrator embedded in the radome for enabling in-situ calibration of the RF front end. The optical calibrator employs an optical timing signal generator (OTSG), a Variable Optical Ampl... | 08/05/2008 |
| 7339540 | Sparse and virtual array processing for rolling axle array system A radar signal processing system comprises a processor that determines a respective position of each of a plurality of radiating elements included in a radar array. Each radiating element has a respectively different motion vector from every other one of the plurali... | 03/04/2008 |
| 7280825 | Aircraft in-flight entertainment system including low power transceivers and associated methods An aircraft in-flight entertainment (IFE) system includes an antenna, an external communications transceiver connected to the antenna for communicating external the aircraft, and a plurality of seat electronic boxes (SEBs) spaced throughout the aircraft for distribu... | 10/09/2007 |
| 7199764 | Maintenance platform for a rolling radar array A maintenance platform for use in a rolling radar array system has a base capable of accommodating at least one person. The base is movably coupled to a support frame, along which the base can move along the longitudinal axis of the support frame rails. The height o... | 04/03/2007 |
| 7183989 | Transportable rolling radar platform and system A transportable platform for a rolling radar array system has a base whereupon a track for an array wheel is provided. A segment of the track can be folded for transportation and deployed when the rolling radar array system is to be in an operational mode. The trans... | 02/27/2007 |
| 7177638 | Aircraft in-flight entertainment system including digital radio service and associated methods An aircraft in-flight entertainment (IFE) system includes a headend unit, and a plurality of seat electronic boxes (SEBs) spaced throughout the aircraft. The headend unit includes a digital satellite radio receiver. A local area network (LAN) connects the digital sa... | 02/13/2007 |
| 7161664 | Apparatus and method for optical determination of intermediate distances An apparatus and a method are disclosed for optically determining a distance r to a feature from an origin or a center. The apparatus uses a beam generation unit for launching a reference beam on a reference path and a first beam on a first path. The center from whi... | 01/09/2007 |
| 7132928 | Threat detection system interface A threat detection system interface that provides translates threat diction information into a tactile signal for a user to indicate the direction and distance of an identified threat relative to an object. The threat detection system interface having applications f... | 11/07/2006 |
| 7129901 | Electromagnetic gravity drive for rolling axle array system An azimuth drive for a radar array comprises an electromagnetic track mounted to a wheel on which the radar array is mounted; and a magnetized carriage assembly operatively coupled to the electromagnetic track and capable of moving along the track in a tangential di... | 10/31/2006 |
| 7079081 | Slotted cylinder antenna An antenna (100) for RF communications. The antenna includes a radiating member (102) which is substantially tubular so as to define a cavity (104) therein. The radiating member (102) is made of a conductive material having a non-conducti... | 07/18/2006 |
| 7053829 | Method for determining a position with the aid of a radio signal having a rotating transmission characteristic A method determines the position of a mobile object by using at least one radio signal having a rotating transmission characteristic with at least one reference station. The relation between the orientation of the transmission characteristic and reference events is ... | 05/30/2006 |
| 6023240 | Method for determining a phase measurement error map using rotating antenna information A method for calculating the phase reception pattern of an antenna system utilized in attitude determination is disclosed. The antenna system is disposed on a platform (or rate table) that rotates about a single, fixed axis at a constant rate as incoming ... | 02/08/2000 |
| 5945947 | Synthetic doppler direction finder for use with FSK encoded transmitters A radio direction finder based on the simulated Doppler frequency shift principle is disclosed that is applicable to FSK encoded pulsed transmissions. Typical applications include tracking of stolen vehicles or shipped package tracking. During FSK decodin... | 08/31/1999 |
| 5835059 | Data link and method This is a Mode S radio frequency transmission system with coordinated use of a rotating directional antenna and omnidirectional antennas. A software-implemented prefilter both processes messages destined for aircraft equipped with Mode S datalink capable ... | 11/10/1998 |
| 5574467 | Doppler positioning using non-planar movement of transmitting source and receiving source Methods and systems for determining a position and an orientation utilize a radio frequency signal transmitted from an effective source location which moves along a first closed, non-planar path. The closed, non-planar path has a plurality of local extrem... | 11/12/1996 |
| 5357259 | Aircraft deployable rotating phased array antenna A stacked Yagi phased array is located within a foil-shaped enclosure that is connected to a rotary joint which allows rotation of the antenna over 360° in azimuth. The radar is normally stored within the equipment bay of an aircraft and is deployed ther... | 10/18/1994 |
| 5247311 | Loro antenna and pulse pattern detection system A passive surveillance method and system, capable of operation in conjunction with both non synchronous and synchronous pulse pattern rotating ground radars. Received signal scan modulated pulses are deinterleaved and correlated with a previously selected... | 09/21/1993 |
| 5243397 | Distance measuring system A system for measuring distances between a central location and any number of remote locations. A transmitter at the central location radiates one or two rotating beams which rotate at an angular velocity which need not be determined. Specially placed sen... | 09/07/1993 |
| 5196856 | Passive SSR system utilizing P3 and P2 pulses for synchronizing measurements of TOA data The range from which a collision avoidance system at an Own station can receive SSR interrogations and reply messages from Other stations, is extended by utilizing P2 pulses for timing TOA measurement in the event P1-P3 pulse pairs are unavailable from th... | 03/23/1993 |
| 4939522 | Method and system for monitoring vehicle location Multiple vehicles located within a predefined search space are located and tracked using at least two spaced-apart transmitters. Each transmitter can broadcast an omnidirectional initialization signal and a positioning signal having a null or break in its... | 07/03/1990 |
| 4882590 | Method for locating a radio frequency emitter A radio frequency emitter transmits pulses in a regular swept beam pattern. As a result of this regular pattern, the angles of transmission of the pulses can be inferred. Intervisibility data of terrain points in a region around an observation point are s... | 11/21/1989 |
| 4685800 | Alignment system Disclosed is a system for aligning elements in azimuth, in particular guns of artillery batteries. A prior system of this type uses an omnidirectional xenon beacon which produces pulses to indicate rotation of a reference unit, a double pulse indicating a... | 08/11/1987 |
| 4438439 | Self-survey means A method and apparatus for a passive station to locate itself relative to a tationary or moving transmitting station transmitting a narrow pulsed scanning beam by utilizing reception of pulses directly from the transmitting station and reception of reflect... | 03/20/1984 |
| 4385299 | Apparatus for transmitting bearing information An electronic navigation beacon, particularly for coastal navigation, in which an unmodulated carrier fc is transmitted from the first antenna of a pair of antennas, and a periodically modulated sideband fc &#b1;fa is tran... | 05/24/1983 |
| 4301455 | Groundspeed measurement system A measurement system for determining the groundspeed of an aircraft during final approach and landing, by measuring at the aircraft the Doppler shift of a radio signal, and/or its modulation components, transmitted by a fixed ground station. The carrier s... | 11/17/1981 |
| 4263596 | Reference station for a distance-measuring system This relates to a reference station for distance-measuring systems wherein the distance between aircraft and the reference station can be measured. The station comprises an antenna and at least one receiver and/or transmitter. The antenna consists of a pl... | 04/21/1981 |
| 4260992 | Radio navigation antenna system for aircraft A radio navigation antenna system suitable for use in an aircraft is disclosed. The fed element of the system is stationary, being at one end of a coaxial conductor which extends through a hollow shaft of a motor. Mounted around the hollow shaft is a grou... | 04/07/1981 |
| 4197542 | Radio navigation system An electronic navigation system ground station, which may be either an omni-range beacon (such as VOR) or a passive direction finder. A circular array of antenna elements has a feed arrangement which includes switched programming of at least one discrete ... | 04/08/1980 |
| 4193075 | Low angle elevation guidance system A system for providing aircraft guidance at elevation angles less than the transmitting antenna beamwidth.... | 03/11/1980 |
| 4109249 | Scanning beam receiver A scanning beam radio guidance system in which a ground beacon equipment transmits a single frequency collimated beam which sweeps a space sector of interest, and also transmits a frequency offset reference signal. An airborne remote receiver is responsiv... | 08/22/1978 |
| 4081669 | Recognition system for class II robots A recognition system for robots is responsive to encoded information from a plurality of sources for enabling a robot to recognize and identify the sources. A receiver located on the robot detects incoming signals and decodes them. The decoded signal is c... | 03/28/1978 |
| 4080600 | Scanning beam radio navigation method and apparatus High accuracy guidance signals are produced over a wide angle by sequencing in a predetermined sequence through a series of narrow angular sectors while electrically scanning the transmitted signals within each sector.... | 03/21/1978 |
| 4071847 | Radio navigation antenna system Tactical radio navigation systems provide bearing information to an interrogating aircraft in response to pairs of interrogation pulses received at a beacon transponder, such systems also provide distance measuring and identification information. To provi... | 01/31/1978 |
| 4053892 | System for enabling coherent signal processing at a remote receiving station A system involving a mechanically or electronically scanned beam of electromagnetic energy and separate antenna means for transmitting a phase reference signal. A remote receiving station, such as on-board an aircraft on landing approach, is able to proce... | 10/11/1977 |
| 4007991 | System for transmitting position information Various items of information are transmitted to a body moving above the surface by a pulsed fan-shaped beam of radiant energy having a flatwise angular sweep. Each such item can comprise two or more kinds of data, e.g., beam angle data and beam identifica... | 02/15/1977 |
| 4007437 | Acoustic foghorn for directional signaling A method of creating a highly directional acoustic beam that can be swept er the water near the entrance of a harbor or channel location. The information provided to a boat operator as a result of the acoustic beam includes the operator's absolute bearing... | 02/08/1977 |
| 3983561 | High frequency wave radiation system producing a rotating beam defining a predetermined geometrical pattern An electromagnetic wave radiation system includes an array of stationary antenna elements, a multiplicity of phase modulator units coupled to the antenna elements, a source of high frequency energy supplying energy to the antenna array, and modulator driv... | 09/28/1976 |
| 3971026 | Multiple beam glide slope radio navigation method with two classes of beams Microwave carrier frequency energy is switched from one beam to another to provide a switched scanning beam for the glide slope function for an instrument landing system. The beams comprise a plurality of upper beams of uniform angular width in elevation ... | 07/20/1976 |
