Adaptation of Spread Spectrum Digital Voice Radios
I. Smith · 1985
Integrated spread spectrum modem and digital voice processor designs can achieve processing gain adaptation without communication interruption. Only those adaptations that hold constant PN chip and/or FH hop rate to avoid modem resynchronization, are considered useful. Sync outages can render modem processing gain advantages ineffective. Variable chip embedding, data redundancy, and header insertion signaling techniques can modify modem processing gain without disturbing operation of the interfacing digital voice processor.