Optimum Processing of Unequally Spaced Radar Pulse Trains for Clutter Rejection
- 1 May 1968
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Aerospace and Electronic Systems
- Vol. AES-4 (3) , 474-477
- https://doi.org/10.1109/taes.1968.5409002
Abstract
A train of radar pulses from one resolution cell can be processed coherently to reject echoes from external clutter and detect targets moving radially with respect to the clutter. Optimum methods of signal processing are defined for systems in which the interpulse spacings are multiply staggered to avoid target blind speeds. Likelihood ratio tests are developed for systems in which the target Doppler frequency is known a priori and for systems employing a bank of filters to cover the target Doppler band. To implement such tests, the N pulses in the train are added with complex weights and the amplitude of the sum compared with a detection threshold. The set of weights which maximizes the average signal-to-clutter ratio is also computed for a single-filter system with unknown target Doppler frequency. When the clutter autocorrelation function is exponential, the clutter covariance matrix can be inverted analytically. This latter result is useful for comparing different interpulse-spacing codes for a particular system application.Keywords
This publication has 5 references indexed in Scilit:
- A comparison of average-likelihood and maximum-likelihood ratio tests for detecting radar targets of unknown Doppler frequencyIEEE Transactions on Information Theory, 1968
- Clutter Suppression by Complex Weighting of Coherent Pulse TrainsIEEE Transactions on Aerospace and Electronic Systems, 1966
- Optimum weighting functions for the detection of sampled signals in noiseIEEE Transactions on Information Theory, 1964
- The Detection of Radar Echoes in Noise. IJournal of the Society for Industrial and Applied Mathematics, 1960
- Complex processes for envelopes of normal noiseIEEE Transactions on Information Theory, 1957