Wideband arbitrary waveform generator for enhanced spaceborne SAR

The paper presents a digital waveform generator for spaceborne applications capable of synthesizing a wide band signal with a high spectral purity and a flexible configuration capability from pulse to pulse. A parallelized processing architecture is employed to overcome space qualified ASICs clock limits. The baseband generator synthesizes linear and non-linear chirps from DC to 500 MHz. Signal phase and amplitude digital compensation is allowed in both time and frequency domain. Finally the generator is provided with frequency hopping and PSK modulation capabilities.