| 摘要 |
Multiplexed carrier signals modulated with digital data are transmitted through a medium polluted with harmonic signals by asymmetrically positioning the frequency of one of the carrier signals between two of the adjacent system harmonics, modulating that carrier signal with digital data at a baud rate so that the spectral density nulls of the modulated carrier signal in the frequency domain coincide with the two adjacent system harmonics to which spectral distribution the detector response is matched, generating at least one additional carrier signal whose frequency is also positioned between the two same adjacent system harmonics but is different from that of the other carrier signal and whose frequency separation from any adjacent carrier signal is equal to the baud rate or some multiple thereof, and modulating each additional carrier signal with digital data at the same baud rate.
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