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Previous papers have demonstrated the viability of natural resonance based target discrimination using extinction pulses (E pulses) and single-mode pulses (S pulses). These papers qualitatively demonstrated the principles of resonance annihilation by forcing the interrogating pulse to have zeros at the complex natural resonance frequencies of the target. This paper presents a quantitative scheme for evaluating discrimination using the E pulse and the S pulse. Moreover, the performance of an automated E-pulse and S-pulse discrimination scheme is evaluated using numerically derived scattering data with varying amounts of noise.

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Abstmct-The natural resonance frequencies of a conducting sphere are determined experimentally by using measured transient scattered field and surface charge responses. Comparison to theory is shown to be excellent for the imaginary parts of the complex frequencies.