Method and apparatus for increasing the channel capacity of a bandwidth limited communications path

A method for increasing the channel capacity of a bandwidth limited communications path, comprising the steps of:

• generating a plurality of carrier signals, each of the plurality of carrier signals having a different predetermined frequency, the bandwidth of said bandwidth limited communications path being less than a summation of the plurality of carrier signal bandwidths,
• modulating each carrier signal with a plurality of multibit information signals, each information signal having a predetermined symbol period T, and
• applying each modulated carrier signal to a separate feedback loop, said separate feedback loop providing a first level of positive feedback to each modulated carrier signal and a second level of positive feedback to signals which interfere with said modulated carrier signal, said second level of positive feedback being less than said first level of positive feedback,
• whereby said modulated carrier signal strength is increased and said interfering carrier signal strength is decreased in relation to said modulated carrier signal strength.

A method for increasing the channel capacity of a bandwidth limited communications path, the communications path carrying a first signal having information associated therewith and a second signal capable of interfering with and degrading the first signal, comprising the steps of:

• applying the first and second signals to a feedback loop, and
• concurrently generating within the feedback loop both a first level of positive
• feedback for increasing the amplitude of the first signal
• and a second level of positive feedback for decreasing the amplitude of the second signal,
• with the second level of positive feedback being less than the first level of positive feedback.