Digital polarimetric system for generating polarization agile signals

摘要: A digital polarimeter employs a signal time stretching technique to apply polarization phase shift characteristics digitally generated agile components. An RF be transmitted is down-converted an intermediate frequency and sampled at rate feasible with currently-available analog-to-digital converters. Horizontal vertical components of the IF are by processing samples. Each sample “time stretched” storing each in M memory locations, such that N samples occupy M×N locations. Because stored incremental from one location next corresponds 1/M th actual sampling interval. The process effectively increases frequency, yielding sufficient resolution. time-stretched subsequently compressed, converted analog signals up-converted for transmission.