Coherent Integration Processing and Detecting of Aircrafts using Pulsed Radar

In this paper, the coherent integration processing and detecting algorithm is proposed to enhance the performance of pulsed radar for aircraft detection. A tunable high performance Finite Impulse Response (FIR) Filter with high linearity and high Signal to Noise Ratio (SNR) is proposed in this work. The proposed FIR filter provides a linear phase response which is aimed to achieve good quality reception of the received pulses for pulsed radar system. The proposed filter is an analog FIR filter with large number of taps is designed to operate in discrete time domain. The incorporation of the time interleaved Sample and Hold (S/H) circuit results with the discrete output of the given pulses. S/H is succeeded by the tunable Trans conductance amplifier and the time interleaved multiplexer (MUX). The received pulses from the pulsed radar with pulse repetition frequencies of 2 MHz, 4 MHz, 6 MHz, 8 MHz and 10 MHz were considered. At the above PRF’s and the Intermediate Frequency (IF) of 15 MHz the received pulse responses were simulated using TANNER EDA. Hence, the designed high performance FIR filter is focused as a matched filter for receiving the pulses from the pulsed radar used in military applications. Radon Fourier Transform (RFT) to carry out long time coherent processing for searching range and velocity dimensions and the blind speed effect at the storm cloud is suppressed.