| 摘要 |
<p>A digital modulator (fig 11) includes a source of a plurality of digital data signals which have a common data bit period. A plurality of encoders each encodes a corresponding one of the plurality of digital data signals using a variable pulse width code. A plurality of pulse signal generators each generates respective pulses, which represent the edges of the corresponding digital data signals. A digital data demodulator (fig 12) includes a source of a modulated signal which includes successive bit periods, representing variable pulse width encoded digital signals. A demodulator demodulates the modulated signal to generate pulses corresponding to received carrier pulses.</p> |
