An th order adaptive lattice filter automatically generates all of the outputs that would be provided by separate transversal filters. This feature may effectively suppress the narrow-band interference (NBI) of either unknown or time-varying bandwidth (or number of frequency bands) in direct-sequence code-division multiple access systems for which the order of the interference rejection filter ...

Root raised cosine roll-off (RRC) filter is one of the most fundamental elements in modern digital communications. This paper proposes a new method to efficiently realize the RRC filter. The method employs cubic Hermite interpolation to obtain a piecewise-polynomial approximation for the impulse response of the RRC filter. Then, the approximated impulse response is efficiently realized by using...

This paper presents a class of pipelined CORDIC architectures for the LMS-based transversal adaptive filter. For this, an alternate formulation of the LMS algorithm is considered, obtained by expressing the mean square error as a convex function of a set of angle variables that are monotonically related to the filter tap weights. The proposed architectures employ microlevel pipelining and are a...

A distributed transversal filter (DTF) is a good candidate for adaptive processing of ultrafast pulses in wideband systems. In this study, we investigate DTFs for sub-nanosecond pulse shaping and synthesis using standard CMOS technologies. A 5-tap DTF was designed using LC artificial transmission lines. A pulse synthesis algorithm was developed for DTFs. A prototype was fabricated using a stand...

This paper proposes the model for Recursive Least Square (RLS) algorithm and Fast Transversal Recursive Least Square (FxT-RLS) Algorithm for effective noise cancellation in acoustics and speech signal processing. The designed model gives the results in a noise free signal as output for RLS and FxT-RLS Algorithm. The filter used here is adaptive filter and the algorithm used is Recursive Least S...

Prediction error filters which combine short-time prediction (formant prediction) with long-time prediction (pitch prediction) in a cascade connection are examined. A number of different solution methods (autocorrelation, covariance, Burg) and implementations (transversal and lattice) are considered. It is found that the F-P cascade (formant filter before the pitch filter) outperforms the P-F c...

A CCD t r a n s v e r s a l f i l t e r w i t h d i g i t a l l y programmable taps i s desc r i b e d . By means of on-chip d i g i t a l c i r c u i t r y the tap weights can he programmed to "0" or " 1 " . M u l t i p l e f i l t e r s can be constructed on a chip together w i t h c i r c u i t r y which scales and sums t h e i r outputs to produce a device w i t h m u l t i l e v e l tap we...