Name
Title | ||
|---|---|---|
An efficient approach for designing nearly perfect-reconstruction low-delay cosine-modulated filter banks |
Abstract | ||
|---|---|---|
A systematic multi-step approach is described for optimizing the stopband response of the prototype filter for low-delay critically sampled cosine-modulated filter banks in the least-mean-square sense subject to the maximum allowable aliasing and amplitude errors. In this approach, filter banks having several channels are designed by starting with a filter bank with a small number of channels. Then, the number of channels is gradually increased and a new prototype filter is optimized using the modified version of the prototype filter of the previous step as a good start-up solution. Several examples are included illustrating the flexibility of the proposed approach for making compromises between the required filter orders, the required filter bank delays, and the aliasing and amplitude errors. These examples show that by allowing very small amplitude and aliasing errors, the stopband performance of the resulting filter bank is significantly improved compared to the corresponding perfect-reconstruction filter bank. Alternatively, the filter bank delay and the order of the prototype filter can be significantly reduced while still achieving practically the same filter bank performance. |
Year | DOI | Venue |
|---|---|---|
2002 | 10.1109/ISCAS.2002.1009968 | ISCAS |
Keywords | Field | DocType |
channel bank filters,delays,digital filters,filtering theory,least mean squares methods,aliasing errors,amplitude errors,cosine-modulated filter banks,filter bank delays,filter orders,least-mean-square sense,low-delay filter banks,maximum allowable aliasing,nearly perfect-reconstruction filters,prototype filter,stopband response,systematic multi-step approach | Band-stop filter,Raised-cosine filter,Active filter,Prototype filter,Computer science,Control theory,Electronic engineering,High-pass filter,Voltage-controlled filter,Butterworth filter,Filter design | Conference |
Volume | Citations | PageRank |
1 | 11 | 0.79 |
References | Authors | |
6 | 2 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Robert Bregovic | 1 | 148 | 18.84 |
| Tapio Saramäki | 2 | 189 | 28.09 |