Radar device and position-determination method
US-2017299711-A1 · Oct 19, 2017 · US
Radar apparatus
US10073170B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10073170-B2 |
| Application number | US-201615045338-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 17, 2016 |
| Priority date | Mar 3, 2015 |
| Publication date | Sep 11, 2018 |
| Grant date | Sep 11, 2018 |
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Abstract
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A radar apparatus includes: a transmitter which, in operation, transmits, as radar transmission signals, code sequences including a plurality of complementary codes having a code length L in each transmission period; a receiver which, in operation, receives one or more reflected waves including the radar transmission signals reflected by an object and are analog signals; an A/D converter which, in operation, converts the one or more reflected signals into digital signals, which are discrete samples; and a calculator which, in operation, performs a first calculation of correlation between the discrete samples and the code sequence transmitted by the transmitter and a second calculation of correlation between the discrete samples and a partial code sequence obtained by extracting a code length L−Q (L>Q≥2) from a tail end of the code sequence transmitted by the transmitter, and that outputs one of a result of the first correlation calculation and a result of the second correlation calculation.
First claim
Opening claim text (preview).
What is claimed is: 1. A radar apparatus comprising: a transmitter which, in operation, transmits, as radar transmission signals, code sequences including a plurality of complementary codes having a code length L in each transmission period; a receiver which, in operation, receives one or more reflected waves, which are analog signals, including the radar transmission signals reflected by an object; an analog-to-digital (A/D) converter which, in operation, converts the one or more reflected signals into digital signals, which are discrete samples; and a calculator which, in operation, performs a first calculation of correlation between the discrete samples and the code sequence transmitted by the transmitter and a second calculation of correlation between the discrete samples and a partial code sequence having a code length L−Q and obtained by extracting the last L−Q codes of the code sequence transmitted by the transmitter, the calculator, in operation, outputs, based on discrete times, one of a result of the first correlation calculation and a result of the second correlation calculation, wherein Q is an integer smaller than L and greater than or equal to two. 2. The radar apparatus according to claim 1 , wherein the code sequence includes 2L complementary codes, and the transmitter transmits the 2L complementary codes in a predetermined number of transmission periods. 3. The radar apparatus according to claim 1 , wherein the code sequence satisfies expressions (1) and (2): RS S 1 : S 2 ( τ , A ( 1 ) , A ( 2 L ) ) = ∑ m = 1 2 L ∑ n = S 1 S 2 a ( m ) n + τ a ( m ) n * ( 1 ) { RS S 1 : S 2 ( τ , A ( 1 ) , A ( 2 L ) )
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Physics · mapped topic
Feedthrough nulling circuits · CPC title
using transmission of pulses having some particular characteristics (G01S13/12, G01S13/22, G01S13/24, G01S13/26, G01S13/28 and G01S13/30 take precedence) · CPC title
- G01S13/284Primary
using coded pulses · CPC title
phase modulated · CPC title
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Frequently asked questions
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- What does patent US10073170B2 cover?
- A radar apparatus includes: a transmitter which, in operation, transmits, as radar transmission signals, code sequences including a plurality of complementary codes having a code length L in each transmission period; a receiver which, in operation, receives one or more reflected waves including the radar transmission signals reflected by an object and are analog signals; an A/D converter which,…
- Who is the assignee on this patent?
- Panasonic Corp
- What technology area does this patent fall under?
- Primary CPC classification G01S13/284. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 11 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).