| 摘要 |
<p>A modulator/demodulator apparatus (12, 14) and method for applications, such as communications, active sensing and navigation is disclosed. The modulator time-delays and time-scales (60) (compresses or dilates) an arbitrary, noise-like "base signal," then it sums (62) this time-delayed and time-scaled version of the base signal with the original base signal to create a "signal pair" or doublet. The two signals in the doublet are completed overlapped in time and frequency. This doublet creation process can be repeated (with different base signals and/or different time-delay/time-scale parameters) and multiple doublets can be summed together and simultaneously transmitted. This demodulator (14) uses the applied differential time-delay and differential time-scale to extract information, such as a message or a radar image, from the doublet.</p> |
