Impact of ADC Sampling Rate and Number of Bits on the Matched Filter Efficiency in Intrapulse LFM Radar

Andre Martins Kruger, Derek Nogueira, Renato Machado, Dimas Irion Alves, Olympio Coutinho

DOI: 10.14209/sbrt.2023.1570923223

Evento: XLI Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2023)

Keywords: Quantization Compression gain Sidelobe level

Abstract

This paper analyzes the effects of changing the sample rate and the number of bits of a linearly frequency- modulated (LFM) pulse on a matched filter-based radar detector. For this purpose, a radar simulator with close to real parameters is used. Changes in the values of those variables are made separately and in combination, verifying their impacts. A reduction of the average sidelobe power and the compression gain was observed with an increase in the number of bits, stabilizing after the fourth bit. Regarding the sampling rate changes, the compression gain was not altered by its variation, unlike the sidelobe power.

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