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US3676598A Frequency division multiplex single-sideband modulation system 失效
频分多单一单边调制系统

Frequency division multiplex single-sideband modulation system
Abstract:
A frequency division multiplex single-sideband modulation system uses a multiplexed digital filter, the passband of which is sequentially shifted from one multiplexed channel to another in synchronization with an input time division multiplex commutator and a frequency multiplexer modulator. In other embodiments of the invention selected spectral components are advantageously emphasized by signal processing techniques employing repetitive sampling prior to modulation and filtering.
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