| 摘要 |
A system and technique for generating vestigial sideband signals capable of carrying digital information at high-bit rates is described. The bits are circulated through one or more delay lines and weighted samples are taken at a rate higher than the highest frequency of the sideband to be transmitted. The samples may be summed, directly or in weighted relationship when a multilevel signal is desired, to provide an output signal. This output signal is filtered to remove those frequencies which lie above the band which is to be transmitted through the channel and thereupon applied to the channel. By apportioning the weight of each sample in accordance with the spectral characteristics of the channel, the output signal will be readily accommodated by the channel and be transmitted therethrough with least distortion.
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