Intermediate Frequency Sampling Based on the Hilbert Transform and Its Hardware Implementation

Provides a concrete scheme applying IF sampling and quadrature transform to realize the quadrature sampling of pulsed Doppler radar signal. High speed IF sampling combined with decimation pro rate can lead to unilateral spectrum and down-converter of signal spectrum. Considering the multichannel consistency and practical requirements, a dual channel ADC chip has been adopted to simplify the hardware design. Test results reveal that approximate Hilbert transform of signal by simple digital signal processing can achieve better performance of mirror frequency rejection.