Spread spectrum radar apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorTakeshi Fukuda
Life of this patent
Estimating the term…
Abstract
A spread spectrum radar apparatus includes: a transmission unit which generates a spread signal that is a spectrum-spread signal, using a first oscillator signal, a second oscillator signal, and a transmission PN code, and which emits the spread signal as a detection radio wave; and a reception unit which receives, as a reception signal, the detection radio wave reflected from an object, and which generates an intermediate frequency signal by despreading the reception signal based on the first oscillator signal and a reception PN code obtained by delaying the transmission PN code.
Claims23
1-23. (canceled)
A spread spectrum radar apparatus comprising:
- a transmission circuit which generates a spread signal that is a spectrum-spread signal, using a first oscillator signal, a second oscillator signal, and a first pseudo-noise code, and which emits the spread signal as a detection radio wave;
- and
- a reception circuit which receives, as a reception signal, the detection radio wave reflected from an object, and which generates an intermediate frequency signal by despreading the reception signal based on the first oscillator signal and a second pseudo-noise code obtained by delaying the first pseudo-noise code,
- wherein a frequency of the first pseudo-noise code is larger than a frequency of the second oscillator signal.
A spread spectrum radar apparatus which:
- modulates a first oscillator signal with a first pseudo-noise code;
- emits, as a detection radio wave, a spread signal that is a spectrum-spread signal;
- receives, as a reception signal, the detection radio wave reflected from an object;
- and generates a demodulation signal by despreading the reception signal based on a second pseudo-noise code and the first oscillator signal, said apparatus comprising:
- a repetition code generating circuit which generates a repetition code by generating a code using a predetermined frequency;
- and
- an exclusive OR operation circuit which outputs, as the second pseudo-noise code, a result obtained by performing an exclusive OR operation between the repetition code and a pseudo-noise code obtained by delaying the first pseudo-noise code.
A spread spectrum detection method comprising:
- a transmission step of generating a spread signal that is a spectrum-spread signal, using a first oscillator signal, a second oscillator signal, and a first pseudo-noise code, and emitting the spread signal as a detection radio wave;
- and
- a reception step of receiving, as a reception signal, the detection radio wave reflected from an object, and generating an intermediate frequency signal by despreading the reception signal based on the first oscillator signal and a second pseudo-noise code obtained by delaying the first pseudo-noise code,
- wherein a frequency of the first pseudo-noise code is larger than a frequency of the second oscillator signal.
Dependencies are inferred from the claim text.