NDLI: Where binary code imbalance decreases DC bias sensitivity

Content Provider	IEEE Xplore Digital Library
Author	Coxson, G.E.
Copyright Year	2000
Description	Author affiliation: Lockheed Martin NE&SS, Moorestown, NJ, USA (Coxson, G.E.)
Abstract	The imbalance of a binary code with elements either +1 or -1 is the number of -1 elements subtracted from the number of +1 elements. A balanced code is one with 0 imbalance. Balanced codes are often used for pulse compression because the DC response of a linear pulse compression module is proportional to the imbalance. A nonzero DC bias combined with an unbalanced code produces a nonzero output. In a radar signal processor, this can mean susceptibility to false alarms from signals that alias to DC at pulse compressor input. This paper examines a common radar signal processor subchain for which some imbalance in pulse compression codes can reduce bias sensitivity. The chain consists of R/theta limiter, pulse compressor and I/sup 2/+Q/sup 2/ modules. It is shown that for an input consisting of DC bias and additive Gaussian noise, there is a nonzero value for the code imbalance for which the mean and variance of the output are insensitive to the magnitude and phase of the input bias.
Starting Page	604
Ending Page	609
File Size	322893
Page Count	6
File Format	PDF
ISBN	0780362624
DOI	10.1109/NAECON.2000.894968
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-10-12
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Binary codes Pulse compression methods Signal processing Radar signal processing Matched filters Additive noise Gaussian noise Signal resolution Signal to noise ratio Decoding
Content Type	Text
Resource Type	Article

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