Dynamic Channelization Based on NPR Modulated Filter Banks

In the received bandwidth,there exist several subband signals with nonuniform distributions and different bandwidths,whose number,bandwidths and locations are unknown and time-variant.A method of dynamic channelization is proposed.Channel number of modulated filter bank is determined by the minimal guard bandwidth among the signals,and then a prototype filter that meet the need of Near-Perfect-Reconstruction (NPR) is designed to construct an analysis filter bank.Second,location of signal is attained by the use of energy detection of every channel,and the corresponding synthesis filter bank is designed to extract desired signal.When dynamic channelization takes place,location of new signal is attained through updating energy detection,and then the corresponding synthesis filter bank can be derived to channelize new signal without changing analysis filter bank.Theory analysis and computer simulation verify the feasibility of the new method.