| 摘要 |
A method and system for combining multiple individual asynchronous data streams (608) for simultaneous transmission in the analog (614) domain via a single conductor or wireless transmission medium. In one embodiment, a carrier signal is amplitude modulated and demodulated on a half-cycle basis. Each half-cycle is amplitude modulated (i.e., multiplied) by a fixed value representative of the data to be encoded that is applied to the half-cycle at zero-crossing (606) and is held steady for the duration of the half-cycle (610). In this manner, each half-cycle of a carrier signal is modulated to contain data. For purposes of redundancy or security, two or more half-cycles may be used to contain the data, but in each case the modulation still occurs on a half-cycle basis.
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