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.