Title :
The design of low-delay nonuniform pseudo QMF banks
Author :
Ying Deng ; Mathews, V. John ; Farhang-Boroujeny, Behrouz
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Utah, Salt Lake City, UT, USA
Abstract :
This paper presents a method for designing low-delay nonuniform pseudo QMF banks. The method is motivated by the work of Li, Nguyen and Tantaratana, in which the nonuniform filter bank is realized by combining an appropriate number of adjacent subbands of a uniform pseudo QMF filter bank. In prior work, the prototype filter of the uniform pseudo QMF is constrained to have linear phase and the overall delay associated with the filter bank was often unacceptably large for filter banks with a large number of subbands. By relaxing the linear phase constraints, this paper proposes a pseudo QMF filter bank design technique that significantly reduces the delay. An example that experimentally verifies the capabilities of the design technique is presented.
Keywords :
channel bank filters; linear phase filters; quadrature mirror filters; delay reduction; linear phase constraints; low-delay nonuniform pseudo QMF bank design; prototype filter; uniform pseudo QMF fiIter bank; Abstracts; Lead; Radio access networks;
Conference_Titel :
Signal Processing Conference, 2006 14th European
Conference_Location :
Florence