Frequency domain adaptive sampling technique for aerospace instrumentation and telemetry applications

Adaptive sampling is a signal processing technique that has been widely employed in the fields of audio coding and sensor networking. A manifestation of the technique for instrumentation and telemetry applications wherein the signal is down-sampled based on frequency domain analysis is described here. The implementation of the technique at system level is explained and the hardware configuration and software flow needed to support it are illustrated. Two applications of the technique viz. data compression and health monitoring are then described in the context of aerospace instrumentation and telemetry systems. The enhancement in efficiency that it enables for data synthesis and analysis is brought out.