Adaptive multi-carrier filter response systems and methods

A tunable diplex filter for a wireless frequency division duplex system, the tunable diplex filter comprising:

• a diplexer in communication between an input node and first and second output nodes, the diplexer being configured to separate signals present at the input node into a first signal to the first output node and a second signal to the second output node, wherein the diplexer comprises;
• a first tunable filter in communication between the input node and the first output node, the first tunable filter comprising a first high-pass tunable element that is tunable to adjust frequencies of a first reject band in which signals in the first tunable filter are attenuated, and the first tunable filter comprising a second high-pass tunable element that is tunable to adjust frequencies of a first tunable pass band configured to have a minimum pass band insertion loss at any of a range of frequencies that are higher than the first reject band;
• and
• a second tunable filter in communication between the input node and the second output node, the second tunable filter comprising a first low-pass tunable element that is tunable to adjust frequencies of a second reject band in which signals in the second tunable filter are attenuated, and the second tunable filter comprising a second low-pass tunable element that is tunable to adjust frequencies of a second tunable pass band configured to have a minimum pass band insertion loss at any of a variety of frequencies that are lower than the first reject band;
• wherein the first reject band, the first tunable pass band, the second reject band, and the second tunable pass band are together selectively tunable to concurrently pass multiple signals in different frequency bands.