Improved algorithm for estimating pulse repetition intervals

Author

Nishiguchi, Ken Ichi ; Kobayashi, Masaaki

Author_Institution

Mitsubishi Electr. Corp., Hyogo, Japan

Volume

36

Issue

2

fYear

2000

fDate

4/1/2000 12:00:00 AM

Firstpage

407

Lastpage

421

Abstract

This paper presents an improved algorithm for estimating pulse repetition intervals (PRIs) of an interleaved pulse train which consists of several independent radar signals with different PRIs. The original version of this algorithm is a complex-valued autocorrelation-like integral, which leads to a kind of PRI spectrum wherein the locations of the spectral peaks indicate the PRI values. The original algorithm, however, has a serious drawback in that it is vulnerable to timing jitter (PRI jitter). We analyze the cause of this vulnerability and propose an improved algorithm using overlapped PRI bins which have shifting time origins. The improved algorithm has proven to be quite effective in obtaining the PRI spectrum for jittered pulse trains, which enables detection of mean PRIs by thresholding

Keywords

correlation theory; radar signal processing; spectral analysis; timing jitter; PRI spectrum; complex-valued autocorrelation-like integral; independent radar signals; interleaved pulse train; pulse repetition intervals; shifting time origins; thresholding; timing jitter; Algorithm design and analysis; Area measurement; Autocorrelation; Histograms; Pulse measurements; Radar measurements; Radar signal processing; Research and development; Signal processing algorithms; Timing jitter;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.845217

Filename

845217