| 摘要 |
<p>A first coded signal is developed from an input signal in a processor in a transmitter, and the resulting first coded signal is transmitted to a receiving unit which contains an identical processor. The output of the receiving processor is a second signal which is coupled with the first coded signal to a subtraction circuit wherein one of the first and second coded signals is subtracted from the other and the resulting difference signal is coupled through a high gain amplifier to the second processor. The output signal from the high gain amplifier is substantially the same as the original input signal. The processor can develop a coded signal by combining the input signal with one or more time delayed input signals as desired.</p> |
