Although under perfect non-fading propagation conditions narrow-band FM may be the best modulation technique, HG is not an ideal medium and single sideband, whi

The frequency management approach recommended includes the following: (1) The selection and dissemination of primary and backup orderwire frequencies from the C

Link quality analysis (LQA) or in-band channel evaluation is a microscopic approach to characterizing HF radio channels for a two-point system(s). Wide band spe

The emphasis in this Real-Time Adaptive Control and Processing task has been on automated frequency management, link connectivity control, channel evaluation, a

Communications using the high frequency spectrum (2-30 MHz) have experienced a considerable resurgence. In recent years, powerful microcomputers and VLSI techno