Stack filters are a class of non-linear, digital filters whose behaviour is defined by Positive Boolean Functions rather than the multiply-accumulate, arithmetic operators that are widely used in conventional digital filters. The implementation of stack filters that can be adapted in real-time is feasible using dynamically reconfigurable FPGAs. This paper reports on efforts to map adaptive stac...

This paper describes a method for implementing immersive audio rendering filters for single or multiple listeners and loudspeakers. In particular, the paper is focused on the case of single or two listeners with different loudspeaker arrays to determine the weighting vectors for the necessary FIR and IIR filters using the LMS (least-mean-squares) adaptive inverse algorithm. It describes transfo...

This paper develops several lattice structures for RLS Laguerre adaptive filtering including a posteriori and a priori based lattice filters with error-feedback, array-based lattice filters, and normalized lattice filters. All structures are efficient in that their computational cost is proportional to the number of taps, albeit some structures require more multiplications or divisions than oth...

A 125 MHz digital equalizer has been designed based on a 0.25 μm CMOS standard cell library. Partially conforming to the Gigabit Ethernet 1000Base-T standard, the equalizer includes a 16-tap feed-forward adaptive FIR filters accepting 8-bit input, and a 16-tap decision-feedback adaptive FIR filters producing 5-level output symbols. The modified Booth encoding and Wallace tree compression scheme...

This paper explores the contributions of all reconstruction combinations of the synthesis delay filters in adaptive synthesis filter banks and their effects on objective performance in image compression. It presents a novel comprehensive approach to manage all reconstruction combinations and their placing configuration in the adaptive synthesis filter banks. Based on the contributions of recons...

In this paper, a new set of difference equations is derived for transient analysis of the convergence of adaptive FIR filters using the Sign-Sign Algorithm with Gaussian reference input and additive Gaussian noise. The analysis is based on the assumption that the tap weights are jointly Gaussian distributed. Residual mean squared error after convergence and simpler approximate difference equati...

Transversal adaptive filters for digital signal processing have traditionally been implemented into DSP processors due to their ability to perform fast floating-point arithmetic. However, with its growing die size as well as incorporating the embedded DSP block, the FPGA devices have become a serious contender in the signal processing market. Although it is not yet feasible to use floating-poin...