M-path filter with outer and inner channelizers for passband bandwidth adjustment

An apparatus for signal channelizing, comprising:

• an outer analysis channelizer configured for receiving and channelizing an input signal for generating a coarse multi-path output;
• an inner analysis channelizer coupled to the outer analysis channelizer for receiving a first portion of the coarse multi-path output and configured for channelizing the first portion of the coarse multi-path output into a refined multi-path output for moving an edge of a passband associated toward a center of the passband;
• the passband being associated with the coarse multi-path output;
• the edge of the passband being associated with the first portion of the coarse multi-path output;
• and
• a plurality of delays coupled to the outer analysis channelizer for receiving a second portion of the coarse multi-path output and configured for delaying the second portion of the coarse multi-path output for generating a delayed multi-path output.

A method for signal filtering, comprising:

• obtaining an input signal having a plurality of carriers or bands;
• first channelizing the input signal with an outer tier of a path filter to generate a coarse multi-path output;
• second channelizing a portion of the coarse multi-path output with an inner tier of the path filter to generate a refined multi-path output;
• delaying a remaining portion of the coarse multi-path output;
• composing the refined multi-path output into a path output;
• outputting the remaining portion of the coarse multi-path output delayed and the path output as a combined multi-path output;
• and
• wherein the second channelizing is for moving an edge of a passband associated with an aggregate of the coarse multi-path output.