System for use in the clearing of fade of a signal AM analog signal AM transmitter and receiver analog for use in the compensation of fade, and,The process of compensation for the fade of a signal AM analog

摘要

"System for use in the clearing of fade of a signal AM analog signal AM transmitter and receiver analog for use in the compensation of fade, and,The process of compensation for the fade of a signal AM analogue ".An apparatus and process for compensation of weakening are provided in which blocks of the analog AM signal (for example, voice) are compressed in time in a transmitter (10).The spaces in the signal compressed in time (15) are filled with pilot symbols (17) (or similar complex waveforms) having known characteristics.Such as predetermined amplitudes. The analog signal is compressed in time (for example, SSB or VSB) is transmitted through the channel fade.In a receiver (20), analog.An estimate (24) of fade that occurred in the transmission channel is made by observing the amplitude of received pilot symbols at separate points in time.The interpolation (26) to determine the amount of fade that occurred through the transmitted signal totasl.A compensator fade (30) compares the signal compressed in time been discoloring and received (28) with the results of interpolation (27).And adjusts the amplitude and phase of the received signal according to offset the weakening that occurred in the transmission channel.The signal is expanded in time am analog compensator (32) and sent to a user.