×

Reduction of radar antenna area

  • US 5,745,069 A
  • Filed: 09/10/1996
  • Issued: 04/28/1998
  • Est. Priority Date: 09/10/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for obtaining data about a body using pulsed signals reflected from the body in a range direction and in an azimuth direction, comprising:

  • transmitting, toward the body, a predetermined sequence of sub-pulses, said sub-pulses transmitted at a rate that is at least a first predetermined repetition frequency;

    detecting, for each said sub-pulse, a corresponding sub-pulse reflection from the body;

    storing a plurality of data items, wherein said plurality of data items includes, for each said sub-pulse reflection, a related data item derived from said sub-pulse reflection;

    first sampling of said plurality of data items for obtaining a first series of data items;

    wherein, there is a first sub-pulse sequence, included in said predetermined sequence of sub-pulses, such that each sub-pulse of said first sub-pulse sequence has a corresponding sub-pulse reflection for which there is a related data item of said first series, and wherein said first sub-pulse sequence has a repetition frequency at least that of the first predetermined repetition frequency;

    second sampling of said plurality of data items for obtaining a second series of data items;

    wherein, there is a second sub-pulse sequence included in said predetermined sequence of sub-pulses, such that each sub-pulse of said second sub-pulse sequence has a corresponding sub-pulse reflection for which there is a related data item of said second series, and wherein said second sub-pulse sequence has a repetition frequency less than said first predetermined repetition frequency;

    providing one or more values related to said plurality of data items, wherein said one or more values have a reduction in sub-pulse reflection ambiguity;

    wherein said step of providing includes the following substeps (A1) and (A2);

    (A1) reducing, in the azimuth direction, an ambiguity in said one or more of values using said first sampling of said sub-pulse data items;

    (A2) reducing, in the range direction, an ambiguity in said one or more of values using said second sampling of said data items;

    using said one or more values having a reduced ambiguity for determining a characteristic of the body.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×