Title :
Linear-phase paraunitary filter banks with complex-valued frequency responses
Author :
Chen, L. ; Chan, K.P. ; Nguyen, T.Q. ; Dai, X.H.
Author_Institution :
Dept. of Electr. Eng., Shantou Univ., Guangdong, China
Abstract :
In this paper, a new design algorithm for complex-valued paraunitary filter banks with conjugate symmetry is proposed which leads the analysis and synthesis filters to have linear-phase frequency responses. The lattice structures proposed in this paper can be treated as a generalization of the factorization of real-valued linear-phase filter banks. Pure-imaginary filter banks can be designed as a special case in the new algorithm. Implementation algorithms and design results of complex-valued filter banks with 8 and 16 channels are included to verify the lattice structures in the design. The filter banks demonstrate linear-phase characteristics in both the time and frequency domain
Keywords :
filtering theory; frequency response; lattice filters; linear phase filters; matrix algebra; analysis filters; complex-valued frequency responses; conjugate symmetry; design algorithm; lattice structures; linear-phase frequency responses; linear-phase paraunitary filter banks; pure-imaginary filter banks; synthesis filters; Algorithm design and analysis; Channel bank filters; Computer science; Design engineering; Filter bank; Filtering; Frequency synthesizers; Information systems; Lattices; Symmetric matrices;
Conference_Titel :
Circuits and Systems, 2000. IEEE APCCAS 2000. The 2000 IEEE Asia-Pacific Conference on
Conference_Location :
Tianjin
Print_ISBN :
0-7803-6253-5
DOI :
10.1109/APCCAS.2000.913571