system for maximum effective transmission win energy

摘要

A signal processing system for processing dynamically varying intelligence-carrying signals represented by different frequencies by transferring these signals within a pass band narrower than the range of the frequencies. The system makes use of a compressor circuit (27) for compressing only signals within a predefined pass band. Active filter circuits (35) shape the compressed signals into a predetermined power envelope having fundamental frequency signal components and harmonically related constituents of the fundamental frequencies. Another compressor circuit (37) is used for further compressing signal constituents of the power envelope. A negative feedback arrangement (29) provides dynamic limiting of compression by the first compressor circuit (27) as a function of increase of compression by the second compressor circuit (37). A linear combiner (57) is used to recombine the harmonically related constituents delivered by the second compressor circuit, and thus retrieve the dynamically varying intelligence-carrying signals. The system involves a new method of signal processing involving first defining a range of original signal constituents to be processed including signal fundamentals and harmonically-related components of said fundamentals and then primarily dynamically compressing the range of original signal constituents. Signal component amplitudes of the dynamically compressed signal are selectively controlled to define a power envelope which is further dynamically compressed to provide processed signal constituents, but while providing time-delayed limiting of compressing of the original signal constituents. The processed signal constituents are linearly recombined to reproduce the intelligence-carrying signals, recovering original frequencies quite beyond the pass band.