Estimation of modulation parameters for LPI radar using Quadrature Mirror Filter Bank

Abstract

The performance of Electronic warfare system mostly depends on the design of LPI radar and ESM receivers. The objective of LPI radar is to detect the target at long ranges and to hide from intercept receiver available at the short range. New modulation techniques were developed to reduce the peak transmitted power for LPI radar. For the design of efficient ESM receiver, many signal processing algorithms were developed which extracts the modulation parameters from the received signal. Quadrature Mirror Filter Bank (QMFB) method is applied to estimate the various parameters of the LPI radar under different types of modulation techniques namely P1, P2, P3, P4 for various noisy conditions. It is observed that QMFB method is efficient to extract all modulation parameters for SNR values under no noise, 0dB, and up to −4dB.