The transmission of digital signals through random, time-variant, dispersive channels with application to chaff scatter

This paper is a report on the characterization and modeling of a specific dispersive communication channel, a chaff scatter channel. Theoretical and experimental results are given. The basic modeling of the chaff scatter channel as a linear, time-variant, random-parameter filter is given and its salient properties developed. Based on this model, a theoretical analysis of a continuous-phase binary FSK communications system operating over the chaff scatter channel is given. Experimental results obtained in the use of this system on an actual chaff scatter channel are then presented and compared with the theoretical results.