Title :
A tree-structured non-uniform filter bank for multi-standard wireless receivers
Author :
Mahesh, R. ; Vinod, A.P. ; Tan, B.Y. ; K-Lai, Edmund M.
Author_Institution :
Sch. of Comput. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
A new approach to implement computationally efficient reconfigurable filter banks for multi-standard wireless receivers is presented in this paper. Based on the concepts of tree-structured quadrature mirror filter bank (TQMFB) and coefficient decimation approach, a reconfigurable and efficient tree-structured non-uniform filter bank (TNFB) is proposed in this paper. The proposed filter bank is designed to extract channels of non-uniform bandwidths with reduced complexity when compared to TQMFB. Each stage of the proposed filter bank consists of a modal filter and a complementary delay to obtain the low-pass and high-pass channels respectively. Design examples show that the proposed TNFB offers an average multiplication rate reduction of 69% over the TQMFB.
Keywords :
computational complexity; high-pass filters; low-pass filters; radio receivers; coefficient decimation approach; complexity reduction; high-pass channel; low-pass channel; modal filter; multistandard wireless receivers; reconfigurable filter banks; tree-structured nonuniform filter bank; tree-structured quadrature mirror filter bank; Bandwidth; Channel bank filters; Channel spacing; Communication standards; Discrete Fourier transforms; Filter bank; Finite impulse response filter; Frequency response; Low pass filters; Mirrors;
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
DOI :
10.1109/ISCAS.2009.5117723
