Engineering Commons^™

An Externally-Synchronized Coherent Communication System Design, Gary R. Ragsdale

Doctoral Dissertations

The research described within this dissertation was initiated on October 1, 1997 to investigate communication link performance improvements made possible by using a frequency reference supplied by a residual carrier broadcast. The primary link types considered were radio frequency links, although prior research in externally-synchronized bistatic radar was also considered.

Conventional radio frequency communications links transfer information from transmitter to receiver by modulating a carrier signal at the transmitter and demodulating the received signal at the receiver. Demodulation can be done coherently or noncoherently. That is, the information on the received signal can be recovered by comparison of the received …