OBJECT DETECTION APPARATUS
First Claim
1. An object detection apparatus disposed in a moving body, the apparatus comprising:
- a transmission signal generator generating a transmission signal of multiple pulse sequences as a plurality of sequences of multiple pulses;
a modulation unit generating a modulation signal of the transmission signal by performing digital modulation on each of the multiple pulse sequences of the transmission signal according to a code sequence;
a wave transmission and reception unit generating and transmitting a transmission wave based on the modulation signal from the modulation unit, and receiving a reflected wave of the transmission wave;
a pulse compression unit calculating a code correlation value between the modulation signal and a received signal, and performing pulse compression on the received signal based on a calculation result of the code correlation value to generate a pulse-compressed received signal, the received signal being derived from the reflected wave received by the wave transmission and reception unit; and
a movement speed acquisition unit acquiring a speed of the moving body, whereina length of the code sequence is modified according to the speed acquired by the movement speed acquisition unit, andan object is detected based on the pulse-compressed received signal from the pulse compression unit.
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Accused Products
Abstract
An object detection apparatus disposed in a moving body generates a transmission signal of multiple pulse sequences as a plurality of sequences of multiple pulses. A modulation signal of the transmission signal is generated by performing digital modulation on each of the multiple pulse sequences of the transmission signal according to a code sequence. A transmission wave based on the modulation signal is transmitted and a reflected wave of the transmission wave is received by the apparatus. The apparatus further detects a speed of the moving body to determine a length of the code sequence. The apparatus calculates a code correlation value between the modulation signal and a received signal, which is derived from the reflected wave, and performs pulse compression on the received signal based on the code correlation value to generate a pulse-compressed received signal. The apparatus detects an object based on the pulse-compressed received signal.
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Citations
13 Claims
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1. An object detection apparatus disposed in a moving body, the apparatus comprising:
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a transmission signal generator generating a transmission signal of multiple pulse sequences as a plurality of sequences of multiple pulses; a modulation unit generating a modulation signal of the transmission signal by performing digital modulation on each of the multiple pulse sequences of the transmission signal according to a code sequence; a wave transmission and reception unit generating and transmitting a transmission wave based on the modulation signal from the modulation unit, and receiving a reflected wave of the transmission wave; a pulse compression unit calculating a code correlation value between the modulation signal and a received signal, and performing pulse compression on the received signal based on a calculation result of the code correlation value to generate a pulse-compressed received signal, the received signal being derived from the reflected wave received by the wave transmission and reception unit; and a movement speed acquisition unit acquiring a speed of the moving body, wherein a length of the code sequence is modified according to the speed acquired by the movement speed acquisition unit, and an object is detected based on the pulse-compressed received signal from the pulse compression unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification