Spread-Spectrum Radio Systems and Networks
M.B. Pursley, D.V. Sarwate · Defense Technical Information Center (DTIC) · 1993
As part of the research completed under the subject contract, we showed that the effectiveness of error-control coding in a frequency-hop radio system can be in creased greatly by the use of side information developed in the radio receiver. For slow-frequency-hop transmission, the inclusion of test symbols in each dwell interval provides a simple method for the derivation of side information for that dwell interval. Requirements on the reliability of the side information are presented in (9) and (14), and their implications in determining the necessary number of test symbols per dwell interval are described. When applied to a frequency-hop radio, concatenated coding provides a method for simultaneously achieving a larger communication range and greater protection against partial-band interference than can be obtained by systems without error-control coding or even most systems with a single form of coding