Reconstructing a signal from its observations via a sensor device is usually called “deconvolution”. Such reconstruction requires perfect knowledge of the impulse response of the sensor involved in the signal measurement. The lower this knowledge, the more biased the reconstruction. In this paper, we present a novel method for reconstructing a signal measured by a sensor whose impulse response ...

The introduction of a simple correction term in gradient algorithms for adaptive IIR filtering is shown to improve their convergence and robustness. The error surface, i.e., the mean squared value of the output error as a function of adaptive coefficients, is quadratic in adaptive FIR filtering and thus a simple gradient search works well. This is not the case in adaptive IIR filtering where th...

A simple design technique for separable denominator circularly symmetric lowpass filter is described. In this technique an FIR filter function with sharp cutoff characteristic and amenable to efficient_ implementation is used to meet the transition band requirement of the filter and to provide approximately circularly Symmetric passband. However, the FIR filter nas high transmission in stopband...

The special impacting filter (SIF) with IIR structure has been used to demodulate ABSK signals. The key points of SIF, including the resonance circuit's high Q value and the "slope-phase discrimination" character of the filter sideband, are demonstrated in the paper. The FIR narrow-band bandpass filtering system, which can also provide the impact-filtering effect, is proposed. A dual carrier sy...

It is well-known that certain non bandlimited signals such as splines can be reconstructed from uniformly spaced samples similar to bandlimited signals. This usually requires noncausal IIR filters. We revisit this result and consider extensions such as derivative sampling theorems and pulse sampling theorems. It turns out that spline-like signals can often be reconstructed from joint sampling o...

In this paper, the two dimensional (2D) digital notch filter design problem is investigated. First, we develop a simple algebraic method for 2D IIR notch filter design. This approach not only has closed-form transfer function but also satisfies bounded input bunded output ( ~ 1 ~ 0 ) stability condition. Next, we use Lagrange multiplier method to design 2D FIR notch filters. This design is opti...

www.xilinx.com 1 © 2009 Xilinx, Inc. All rights reserved. XILINX, the Xilinx logo, and other designated brands included herein are trademarks of Xilinx, Inc. All other trademarks are the property of their respective owners. A large percentage of filters implemented in the digital domain are Finite Impulse Response (FIR) filters. These filters are used over a wide range of sample rates and are w...

This paper proposes a novel method for designing two-channel and M-channel causal stable IIR PR filter banks using cosine modulation. In particular, we show that the PR condition of the two-channel IIR filter banks is very similar to the two-channel FIR case. Using this formulation, it is relatively simple to satisfy the PR condition and to ensure that the filters are causal stable. Using a sim...

FIR filters can achieve linear phase, but for a given set of specifications require much higher order than the corresponding IIR design, especially when the transition band is very narrow. This paper reviews the original and some further developments of the IFIR technique, which is used to lower the complexity of a FIR filter.

This paper proposes a new method of a pole controlled IIR adaptive digital filter (ADF) with a preceded FIR section, which consists of parallel connected second order IIR filters controlled by each inherent identification error. The FIR part works to identify a flat delay and responses resulting from poles near the origin of z-plane. On the other hand, the IIR part identifies poles near the uni...