Separating and extracting modulated signals

摘要

Methods, systems, and apparatus for receiving an input signal, where the input signal includes a carrier signal modulated with a first modulation signal and a second modulation signal, and where the second modulation signal is a TM signal. Demodulating the first modulation signal from the input signal. Modulating an unmodulated carrier signal with the first modulation signal to generate a third signal, where the third signal includes the carrier signal modulated by the first modulation signal. And, removing the first modulation signal from the input signal by subtracting the third signal from the input signal to extract the TM signal from the input signal.

主权项

1. A system comprising:
at least one processor; and a data store coupled to the at least one processor having instructions stored thereon which, when executed by the at least one processor, causes the at least one processor to perform operations comprising:
receiving an input signal, the input signal comprising a carrier signal modulated with a first modulation signal and a second modulation signal, the second modulation signal being a transpositional modulation (TM) signal;demodulating the first modulation signal from the input signal;modulating an un-modulated carrier signal with the first modulation signal to generate a third signal, the third signal comprising the carrier signal modulated by the first modulation signal; andremoving the first modulation signal from the input signal by subtracting the third signal from the input signal to extract the TM signal from the input signal.