Spread spectrum technology for expendable data link terminals

The concept of variable-data-rate/variable-jam-resistance is described. Technology and cost considerations dictate a hybrid spread spectrum approach, resulting in an optimized mix of technologies based on cost/performance trades. A variable-data-rate/variable-jam-resistant laboratory model is constructed demonstrating the viability of the approach. Attention is also given to system applications utilizing this capability. It is noted that when combined with compatible methods of source coding, variable-data-rate transmission may provide new system capability. The factors that must be considered in optimizing the signaling structure for such a system are discussed.