 Method of checking interference on process pattern caused by tool positioning |
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| Communication apparatus |
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| Spread aloha CDMA data communications |
| Even though different codes are not required for multiple access in CDMA channels, the question ... |
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| Electric slider |
| It is an object of the invention to provide an improved slider of the above-outlined type which ... |
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| System for preventing collision of vehicles |
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| Smoke and heat detector alarm |
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| Door alarm system |
| OF THE INVENTION The door alarm system of the invention is for a door 1 (FIGS. 1 to 4) rotatably ... |
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| Armour-piercing high-explosive projectile with cartridge |
| I claim: 1. An armour-piercing high-explosive projectile comprising a body portion attached to a ... |
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| Contoured dental posts |
| Accordingly, it is an object of the present invention to provide an improved dental post. A further ... |
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| Process and apparatus for treating teeth |
| OF THE PREFERRED EMBODIMENT Referring now to the drawing, FIG. 1 shows a tooth 1 the volume of ... |
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Low complexity digital processor for MX security radar
| Details |
Inventors: Norsworthy, Keith H.;
Assignee: The Boeing Company (Seattle, WA)
Primary Examiner: Tarcza; Thomas H.
Assistant Examiner: Hellner; Mark
Attorney, Agent or Firm: Finnegan, Henderson, Farabow, Garrett and Dunner
The radar signal processor multiplies in real time samples from a radar system and coefficients representing desired frequency windows to be examined and integrates those products over a time period related to the particular frequency window in order to determine the amount of energy in the different frequency windows of the different range bins of the radar system. |
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DETAILED DESCRIPTION Briefly, the radar signal processor of this invention mixes, in real time, samples received from the radar system with certain weighting function coefficients that correspond to the frequency windows to be examined.
Each product of that mixing is added to a corresponding running sum or integral which, at appropriate times, is used to determine the amount of energy in the frequency windows examined for the different range bins.
More particularly, the radar signal processor of this invention for determining, from samples of energy received from a radar system, the amount of energy received in at least one range bin and in at least one frequency window comprises: a memory for storing a set of coefficients which relate to the number, bandwidth, and shape of the at least one frequency window; means connected to the memory and to the radar system for multiplying each of the samples by corresponding individual ones of the coefficients; an accumulator connected to the multiplying means for forming, from the products from the multiplying means, at least one integral, each integral corresponding to a different range bin and frequency window combination; and means connected to the accumulator for periodically computing from the integrals formed by the accumulator the amount of energy received by the radar system in at least one range bin and in at least one frequency window.
The method of this invention for determining, from samples of energy received by a radar system, the amount of energy in at least one frequency window of at least one range bin, each frequency window corresponding to two sets of coefficients which relate to the bandwidth and shape of that window, comprises the steps of: multiplying each of the samples by a corresponding coefficient from each of the sets; forming, from each product of a sample and a corresponding coefficient, at least one integral, each integral corresponding to the range bin of the sample and the frequency window related to the coefficient used to form that product; and periodically computing, using the at least one integral, the amount of energy received by the radar system in the at least one frequency window of the at least one range bin
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Telecommunications 
