Quantization and Saturation Noise Due to Analog-to-Digital Conversion of Radar Returns from Targets with Log-Normal Radar Cross-Section Distributions |
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Authors: | Mirmak EV Blumgold RM Grimes G |
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Institution: | Air Force Avionics Laboratory Wright-Patterson Air Force Base, OH 45433; |
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Abstract: | An analysis of the saturation and quantization noise generated by analog-to-digital (A/D) conversion of radar returns from targets with log-normal radar cross sections is presented. The results of the analysis show that the high-cross-section tails of the log-normal distribution require higher saturation levels to be set in the A/D converter. The setting of the higher saturation level in the converter results in an increase in quantization noise. Thus the minimum achievable distortion in the output of the A/D converter signal is considerably higher than that for radar targets if their radar cross section had an exponential power distribution. |
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