Abstract: At least two information waveforms are transmitted over the same communications channel using Lincompex techniques. Each of the information waveforms are modulated using Lincompex techniques to generate compressed information waveforms and associated control tones. The compressed information waveforms have the same frequency band. The compressed information waveforms and associated control tones are arithmetically combined, and transmitted over a transmission medium. These signals are then received from the transmission medium. A plurality of Lincompex expanders demodulate the received signals using Lincompex techniques and one of the associated control tones.

Abstract: A system and method for calibrating telecommunications systems employs frequency hopping techniques, and more particularly, employs linked compressor-expander (Lincompex) techniques in the transmission of any combination information waveform such as that generated by voice or digital data. A calibration tone sent at each channel frequency is compared against a reference frequency. Based on the results of the comparison, the information waveform is frequency compensated. Alternately, a calibration tone sent at an initial channel frequency is compared to a reference frequency to determine at total frequency error. The system then predicts the total frequency errors for successive channel frequencies. The system frequency compensates the information waveform based on the determined and predicted total frequency errors.