Construction method of non-uniform DFT modulation filter bank based on phase modulation

The invention discloses a construction method of a non-uniform DFT modulation filter bank based on phase modulation. The construction method comprises: firstly, designing a prototype filter of a uniform filter bank; secondly, constructing a uniform DFT modulation filter bank according to the prototype filter; and finally, combining and performing phase modulation on various sub-band filters of the uniform filter bank and generating various sub-band filters of the non-uniform DFT modulation filter bank. According to the construction method, a connection between the non-uniform DFT modulation filter bank and the uniform DFT modulation filter bank is theoretically established by virtue of sub-band combination and phase modulation; and the constructed filter bank shows excellent overall performance.