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 |
| 7136675 | Method of distributing communications within a cell of a radio-communication network, and a corresponding device and base station The invention relates to a method of distributing communications established by radio-communication terminals, within a geographic cell of a radio-communication network, the geographic cell being sub-divided into at least two geographic sectors. According to ... | 11/14/2006 |
| 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 |
| 5448248 | Adaptive radio direction finding system RF energy received by an antenna (10) of a radio direction finding system is evaluated for determining the presence of a RF signal transmission source at bearing values at which the received RF energy is statistically strong (33) and which have a relative... | 09/05/1995 |
| 5157408 | Low probability of interception relative position determination system A radio system for determining the range and bearing of mobile equipment, such as an aircraft, relative to reference equipment such as an aircraft carrier, with low probability of interception (LPI). The aircraft remains equipped with high power range and... | 10/20/1992 |
| 5016019 | Method and apparatus for processing synthetic aperture aerial signals A method and apparatus of deriving a directional polar diagram from the signals R received by a synthetic-aperture aerial (in direction-finding applications), or P from such an aerial (in radio-beacon applications), these signals including a carrier of fr... | 05/14/1991 |
| 4724439 | Microwave radiometer using fanbeam inversion A microwave radiometer reconstructs images by fanbeam inversion. True time delay (100), frequency (600, 700) and mechanical scanning systems (200) are disclosed. The mechanically scanning radiometer includes a fanbeam antenna (210) to scan a scene so that... | 02/09/1988 |
| 4590476 | Tracking servo compensator with rate aiding A tracking servo compensator is disclosed for radar systems which steer their antenna beams using a servomechanism that physically moves the antenna. The disclosed tracking servo compensator permits switching between trackers (e.g. from area to point trac... | 05/20/1986 |
| 4423420 | Cancellation of group delay error by dual speed of rotation Radio direction finders using the principle of periodic scanning of a circular array inherently display a bearing error related to the group delay through the receiving, detection and evaluation process. Correcting by subtracting a constant θo... | 12/27/1983 |
| 4107686 | Scanning beam receiver system with coherent post-detection signal processing A receiving system for a time-reference, scanning beam radio guidance system in which the scanning beam, an offset frequency reference signal and a time reference signal are provided from the ground beacon location. The receiving system includes a first d... | 08/15/1978 |
| 4090200 | Method for the comparative vector measurement of signal pulses arriving nearly simultaneously at several radio receiving stations A method for the comparative vector measurement of keyed radio signal pulses arriving nearly simultaneously at several radio receivers, particularly DME pulses, which can exhibit great level differences. The pulses at each receiver are individually fed to... | 05/16/1978 |
| 4021808 | Real time threshold A beam scanning through a receiver is detected at the receiver deriving a threshold level from the peak of the received beam, the threshold being used to detect the received beam envelope as delayed by an analog delay circuit.... | 05/03/1977 |
| 3946320 | Signal processor for doppler type navigation system A signal processing arrangement, particularly for Doppler ILS, giving complete scanning verification and tracking filter operation. Two commutated filters are driven by two voltage controlled oscillators whose roles are interchangeable. One filter is used... | 03/23/1976 |
