Accession Number:

AD0416649

Title:

CODING FOR TRACKING RADAR RANGING.

Descriptive Note:

Technical rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1963-06-11

Pagination or Media Count:

38.0

Abstract:

A technique for determining the range from a tracking radar to a space vehicle is described in which an uninterrupted periodic binary sequence of very long period is used to modulate the radar output. The sequence employed has the property that a short segment of the sequence is uniquely associated with its phase or position in the sequence. Therefore, ee distance can be determined from the phase displacement between a segment transmitted and a segment received at the same instant in time. A digital correlation procedure is employed to discriminate against detection errors which occur nn the received segments. The expected time required to measure the distance and the probability of computing an incorrect distance are presented for various probabilities of detection error. Modulating sequences are listed for which the probability of computing an incorrect distance is minimum. Methods of logic design are presented for the required digital circuitry. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE