Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1999-06-08
2000-06-06
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
342111, 342113, 342115, 342116, 342133, 342146, 342196, G01S 1342
Patent
active
060724226
ABSTRACT:
An FM-CW radar apparatus permits proper pairing between beat frequencies in an up interval and beat frequencies in a down interval and comprises a peak extracting section for extracting level peaks at each scanning angle of beat frequencies, each beat frequency being a frequency difference between a received wave and a transmitted wave, in each of a modulation frequency increasing interval and a modulation frequency decreasing interval; a grouping section for grouping level peaks of approximately equal beat frequencies adjacent in a scanning direction to create level peak groups having respective typical scanning angles, for either of the increasing-interval level peaks and decreasing-interval level peaks thus extracted; a pairing section for pairing a level peak group in the increasing interval with a level peak group in the decreasing interval where the level peak groups have an equal typical scanning angle; and a calculating section for calculating target information from beat frequencies of the increasing-interval and decreasing-interval level peak groups thus paired.
REFERENCES:
patent: 5732344 (1998-03-01), Yamada
patent: 5751240 (1998-05-01), Fujita et al.
patent: 5982321 (1999-11-01), Iihoshi et al.
Sotomayor John B.
Toyota Jidosha & Kabushiki Kaisha
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