Accession Number : AD0666661

Title :   MATCHED-FILTER RESPONSES OF THE LINEAR FM WAVEFORM.

Descriptive Note : Rept. for Sep 66-Jun 67,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Mitchell,R. L. ; Rihaczek,A. W.

Report Date : NOV 1967

Pagination or Media Count : 49

Abstract : Although the properties of the linear FM signal have been studied previously in considerable detail, such studies have involved rather narrow aspects of the theory. This paper extends the work in several respects. By presenting three-dimensional plots of the conventional ambiguity function of the linear FM signal in more detail than available before, we can study the sidelobe behavior off as well as on the axes, without weighting, with unilateral weighting in the receiver, and with bilateral weighting. These plots reveal interesting properties related to the signal symmetry in time and frequency. The matched-filter response then is extended to include Doppler distortions of the modulation function. Plots of the response are presented for various degrees of distortion, for signals with and without weighting. Lastly, we consider the effects of a mismatch in range acceleration, again for the various cases of interest. The results convey a thorough insight into the properties of Chirp radar under a broad range of operational conditions. (Author)

Descriptors :   (*RADAR SIGNALS, ELECTROMAGNETIC WAVE FILTERS), FREQUENCY MODULATION, RADAR PULSES, DOPPLER EFFECT, RANGE(DISTANCE), VELOCITY, ACCELERATION, BANDWIDTH, TIME, MATCHED FILTERS, NUMERICAL METHODS AND PROCEDURES

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE