Patent
Multiple parameter doppler radar
William D. Goodson,John R. Alden +1 more
- 02 Jul 1986
86
TL;DR: In this article, a multiple parameter doppler radar system transmits a radar signal which is alternated between a first and second frequency toward a target, and the phase magnitude between the two Doppler signals is measured and scaled to a target range.
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Abstract: A multiple parameter doppler radar system transmits a radar signal which is alternated between a first and second frequency toward a target. The doppler shifted signals reflected from the target are received and processed to derive a pair of doppler signals related respectively to the first and second frequency signals. The frequency of one of the doppler signals is measured and scaled to a target speed. The phase magnitude between the two doppler signals is measured and scaled to a target range. The phase lead/lag relationship of the two doppler signals is detected to determine if the target is moving toward or away from the radar system. The components of the system are controlled by a microprocessor which is programmed to perform quality determinations on the data derived from the signals to assess the reliability of the data even in a multiple target environment prior to displaying the parameters of target motion.
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Citations
Patent
Radar detection circuit for a WLAN transceiver
Christopher J. Hansen,Jason A. Trachewsky +1 more
- 14 Sep 2004
TL;DR: In this article, the radar detection block includes circuitry for detecting and measuring the radar signals in the presence of such interference, including a moving average filter, a threshold comparison state machine, and radar detection logic within software that is executed by a processor for determining whether a radar signal is present.
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Patent
Interference avoidance system for vehicular radar system
Russell F. Sherry,Jerry D. Woll,Van R. Malan +2 more
- 09 Aug 1993
TL;DR: In this paper, the microwave transceiver section of the vehicular target detection system, in which the present invention is incorporated, transmits and receives time-multiplexed microwave signals (104) having at least two channels (frequencies) spaced about 250 kHz apart.
79
Patent
Police traffic radar using FFT processing to find fastest target
John L. Aker,Robert S. Gammenthaler,Alan B. Mead +2 more
- 09 Aug 1996
TL;DR: In this article, a police radar utilizing digital data transmission from the antenna unit to a separately housed counting and display unit is presented, where a double balanced mixer is used to suppress even order harmonics.
58
Patent
Positioning of mobile wireless terminal
Teruhisa Ninomiya,Isamu Yamada +1 more
- 18 Oct 2006
TL;DR: In this article, an apparatus for determining the position of a mobile wireless station is proposed, which consists of a first reference position, a second reference position and a second relative angular direction between the mobile station and the first reference station.
53
Patent
Police traffic radar for calculating and simultaneously displaying fastest target speed
John L. Aker,Robert S. Gammenthaler,Alan B. Mead +2 more
- 10 Feb 1995
TL;DR: In this paper, a police radar utilizing digital data transmission from the antenna unit to a separately housed counting and display unit is presented, where a double balanced mixer is used to suppress even order harmonics.
49
References
Patent
Method and apparatus for digitally determining the speed of a target vehicle while the radar platform vehicle is in motion
Fred M. Berry
- 06 Nov 1980
TL;DR: In this paper, a moving doppler radar unit capable of separating the incoming Doppler signal into its respective frequency components by means of frequency translation techniques and fixed frequency filters is disclosed.
39
Patent
Traffic radar device
John L. Aker,William D. Goodson +1 more
- 14 Apr 1978
TL;DR: In this article, a traffic radar device has a microprocessor controlled system for facilitating the Doppler signal processing, which enables the signal to be gathered on a digital basis and arrayed in the memory of the microprocessor unit.
35
Patent
Traffic radar system
Bryce K. Brown,Stephen Correll,Jay Schreiber,Lawrence E. Mayfield,Darrell D. Jenkins +4 more
- 10 Mar 1980
TL;DR: In this paper, a traffic radar system is provided in which the speed of a target vehicle is determined by measuring the difference in frequency between a component of a doppler signal which has a frequency proportional to the relative speed of the target vehicle and a moving patrol vehicle, and a reference signal having a frequency proportionally to the speeding of the patrol vehicle.
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