Adaptive signal detection on the background clutter
Journal Title: Вісник НТУУ КПІ. Серія Радіотехніка, Радіоапаратобудування - Year 2017, Vol 0, Issue 70
Abstract
Introduction. The article poses the problem of optimal detection of coherent-pulsed signals of moving targets against a background of clutter with a priori uncertainty of the signals and clutter parameters. The aim of the article is the synthesis and analysis of adaptive signal detection systems. Synthesis of adaptive detection algorithm. The algorithm for optimal detection of signals against a background of clutter is determined by calculating the likelihood ratio. The implementation of the obtained algorithm for optimal linear filtering is assumed on the basis of the adaptive matrix filter and the non-adaptive multichannel filter. Evaluation of the signal phase. A quasi-optimal algorithm for estimating the Doppler phase of the signal from the output samples of the adaptive matrix filter is synthesized. Modeling on a PC has established that the asymptotic properties of the obtained estimates are acceptable for their use in adaptive signal accumulation. Synthesis of the adaptive detection system. A detection algorithm with adaptive signal accumulation is proposed. This algorithm combines adaptation to the clutter parameters and to the Doppler phase of the signal. A block diagram of the adaptive signal detection system is given. Analysis of the adaptive detection system. The optimal size of the detuning of Doppler channels of adaptive signal accumulation is determined by PC simulation. It is established that with an allowable loss level of up to 2 dB, the number of Doppler channels can be reduced by a factor of four. Conclusion. The use of Doppler signal estimation in detection systems with adaptive signal accumulation allows reducing the number of Doppler channels or, with the same number of Doppler channels, detuning between channels, eliminating interchannel losses.
Authors and Affiliations
D. Popov
Keywords
Related Articles
- EP ID EP308201
- DOI 10.20535/RADAP.2017.70.5-10
- Views 56
- Downloads 0
Classification of the state of the vascular system on graph element of the pulse wave
The algorithm of classification is offered and creation of classificatory is illustrated for three classes of pulse diagram.
Basic algorithm of treatment EKG for the increase of authenticity of determination of macronutrients in blood
In the article new approaches over of perfection of algorithm of treatment ЭКГ are brought for the increase of authenticity of determination of macronutrients in blood. Treatment of these EKG is in-process examined by me...
Electronic manual a component of modern educational environment
The comparative analysis of printed and electronic books is carried out. The conditions of effective use of electronic textbook are considered.
FPGA Implementation of Viterbi Decoder for Satellite System
Convolutional encoding with Viterbi decoding is a powerful method for forward error correction. This paper presents a short overview of a Viterbi decoder FPGA (Field-Programmable Gate Array) implementation for Thuraya wi...
System for measuring electric resistance skin
Introduction. To measure the electrical resistance of leather frequently used system for applying testing signals from external current sources or voltage. Power testing signals the maximum limit, when they Electro studi...