How the GaGe Digitizer was used: The GPS receiver employs a GaGe digitizer to sample intermediate frequency (IF) GPS signals at a predetermined rate. These sampled signals are stored in memory for subsequent processing. The receiver’s digital signal processor (DSP) executes fast convolution operations on the stored signals to derive pseudo range information, enhancing processing efficiency.
How the GaGe Digitizer was used: The GaGe Digitizer was used in conjunction with a dual- channel spectrum analyzer (SA) based on spatial-spectral (S2) materials. This setup monitored the outputs of a dual-drive, dual-port optical Mach-Zehnder interferometer, which received inputs mimicking signals from a two-element antenna array. The digitizer helped in capturing and processing the signal data in real-time with high precision, allowing for sub-millisecond updates and sub-megahertz resolution.
How the GaGe Digitizer was used: In this research, a 16-bit 200 MS/s GaGe digitizer card was employed to capture outputs from balanced detectors in the spatial-spectral (S2) system. This digitizer recorded the readout spectra from the S2 materials, enabling detailed post- processing to recover and analyze the spectral data.
