Wideband highpass filters are widely used in applications such as wireless CODEC design or ECG (Electrocardiogram) signal processing. It is well-known that wideband digital filters suffer from large sensitivity and roundoff noise. In this letter, an efficient pipelined WDF (Wave Digital Filter) design method for wideband filters is proposed. Using one design example, it is shown that the hardware cost can be reduced by 45% by using the proposed approach instead of conventional approaches.
|Original language||English (US)|
|Number of pages||3|
|Journal||IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing|
|State||Published - Sep 1995|
Bibliographical noteFunding Information:
In this letter, based on the DIFIR technique , a pipelined WDF design method for wideband filters is proposed. To apply the DIFIR tkchnique to wideband filters, an IIR transfer function with approximately linear phase is designed using the linear phase IIR filter design method in . The IIR section is composed of a parallel connection of an allpass filter and a pure delay term. The IIR section is followed by some FIR filters whose transition bandwidths are very wide. Due to the wide transition bandwidths, the FIR filters can be Manuscript received March 14 1995. This work was supported by the National Science Foundation under Contract MIP-9258670. This paper was recommended by Associate Editor S. Kiaei. J.-G. Chung is with the Department of Information & Communication Engineering, Chonbuk National University, Chonju, Korea. H. Kim and K. K. Parhi are with the Department of Electrical Engineering, University of Minnesota, Minneapolis, MN 55455 USA. IEEE Log Number 9412388.
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