Method and System for Determining Locations of Moving Objects with Maximum Length Sequences

• US 20110077905A1
• Filed: 09/30/2009
• Published: 03/31/2011
• Est. Priority Date: 09/30/2009
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Inventors: Maaref, Amine, Igo, Frederick J JR., Duan, Chunjie, Yim, Raymond
• Granted Patent: US 8,121,805 B2
• Time in Patent Office: Days
• US Class Current: 702/155
• CPC Class Codes: G01B 7/003 for measuring position, not involving coordinate determination coordinate measuring G01B7/004

Abstract

A location of an object is determined by arranging a sequence of bits on a substrate. The sequence of bits includes subsequence of bits, and each subsequence of bits is unique for each location along the substrate. When the object is at a particular location along the substrate a sensor detects the subsequence of bits at the particular location, and a decoder associates the location of the subsequence at the particular location with the object. The substrate can be a leaky coaxial cable with slits or not, corresponding to the bits, or lane markings on a road.

Claims

7-1. The system of claim 7, wherein the set of N antennas perform beam steering over the subsequence of bits.

8-2. The system of claim 1, wherein the substrate includes a surface and the sequence of bits are formed as marks on the surface, and the sensor is a camera mounted on the object to acquire images of the sequence of bits.

9-3. The system of claim 1, wherein the bits are distinguishable by color.

10-4. The system of claim 1, wherein the bits are distinguishable by shape.

18. A method for determining a location an object, comprising a processor for performing steps of the method, comprising the steps of:

arranging a sequence of bits on a substrate, wherein the sequence of bits includes overlapping subsequences of bits and each subsequence of bits is unique for each location along the substrate;

sensing the subsequence of bits at a particular location of an object; and

decoding the location of the subsequence of bits at the particular location; and

associating the location of the subsequence of bits at the particular location with the object.