WEAK-SIGNAL COMMUNICATION TECHNIQUES TECHNICAL DOCUMENTARY REPORT ASD-TDR-63-525

摘要

This report contains the principal results of a two-year study of weak-signal communication techniques. The theoretical results ob-tained during the first year of the program, although summarized here, are documented more fully in the interim report (AD 299-219) dated April 1962. That report includes evaluation of bounds on communica¬tion performance, determination of the threshold performance of FMFB demodulators, analysis of FSK systems with noise-like signals, and determination of group code performance. The present report contains the results of additional theoretical studies on threshold bounds for analog communication systems; a detailed analysis and evaluation of the use of binary group codes on the Gaussian noise channel; and a more complete analysis of the performance of multilevel FSK systems which employ noise-like signals. An octary system, a breadboard ver¬sion of which was implemented under this program, is described in detail.