Design and implementation of biquad digital filter

Pradabpet, Chusit; Yimman, Surapun; Hinjit, W.; Chivapreecha, Sorawat; Dejhan, Kobchai

doi:10.1109/apcc.2003.1274278

Cited by 8 publications

(8 citation statements)

References 1 publication

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“…As long as the cut-off frequencies of the desired high-pass and low-pass driver filter and the center frequencies of the desired bandpass driver filter are all at the same place, the resulting transfer functions can share the same denominator, therefore can be implemented with more compact size and lower computation cost. While the full pole-zero placement techniques (Pradabpet et al, 2003; Waterschoot, Moonen, 2007) only cope with secondorder systems, the hybrid design procedure is compatible with higher-order digital filters. Numerical examples of fourth-order infinite impulse response (IIR) filters are demonstrated in this paper.…”

Section: Introductionmentioning

confidence: 99%

“…One of the most efficient methods is the bilinear transformation, a design procedure which has been simplified by utilizing the Pascal matrix (Psenicka et al, 2002;Konopacki, 2005). As an alternative to the modification of traditional design procedures, the pole-zero placement techniques (Pradabpet et al, 2003;Waterschoot, Moonen, 2007) enable people to design biquad filters in the digital domain. Here, we extract the features of the Pascal matrix (Psenicka et al, 2002) and the pole-zero placement techniques (Pradabpet et al, 2003), adding a magnitude scaling method, to develop a new design procedure.…”

Section: Introductionmentioning

confidence: 99%

“…As an alternative to the modification of traditional design procedures, the pole-zero placement techniques (Pradabpet et al, 2003;Waterschoot, Moonen, 2007) enable people to design biquad filters in the digital domain. Here, we extract the features of the Pascal matrix (Psenicka et al, 2002) and the pole-zero placement techniques (Pradabpet et al, 2003), adding a magnitude scaling method, to develop a new design procedure. In real time, the resulting filter structure operates more efficiently than that based on Butterworth prototype filters (Yao et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Driver Filter Design for Software-Implemented Loudspeaker Crossovers

Yao

2015

Archives of Acoustics

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A hybrid method is presented for the integration of low-, mid-, and high-frequency driver filters in loudspeaker crossovers. The Pascal matrix is exploited to calculate denominators; the locations of minimum values in frequency magnitude responses are associated with the forms of numerators; the maximum values are used to compute gain factors. The forms of the resulting filters are based on the physical meanings of low-pass, band-pass, and high-pass filters, an intuitive idea which is easy to be understood. Moreover, each coefficient is believed to be simply calculated, an advantage which keeps the softwareimplemented crossover running smoothly even if crossover frequencies are being changed in real time. This characteristic allows users to efficiently adjust the bandwidths of the driver filters by subjective listening tests if objective measurements of loudspeaker parameters are unavailable. Instead of designing separate structures for a low-, mid-, and high-frequency driver filter, by using the proposed techniques we can implement one structure which merges three types of digital filters. Not only does the integration architecture operate with low computational cost, but its size is also compact. Design examples are included to illustrate the effectiveness of the presented methodology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Driver Filter Design for Software-Implemented Loudspeaker Crossovers

Yao

2015

Archives of Acoustics

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“…This is because in some cases, increasing the number of intermediate word-length does not increase the SNR of the bit-true model or the system that should be implemented. Increasing the accuracy of the filter by expanding the input word-length forms ULP (unit in last significant) [5] with appropriate scaling factor to keep the 161 A q -E NS| I A Sai Ele SINAD (Signal to Noise and Distortion) at the targeted value. After defining the best precision word-length that must be added to the word-length of the input and intermediate signals, the bit-true model is ready to be used.…”

Section: Bit-true Model Simulationmentioning

confidence: 99%

“…Biquad active filter is the circuit that gives three frequency-responses at the same time as lowpass, highpass and bandpass filtering [5]. We have prepared a parametric implementation to be reused by all of the parallelform filters.…”

Section: Modular Implementationmentioning

confidence: 99%

A Quantitative Approach to Digital Filter Implementation

Hollisaz

Madani²,

Fakhraie³

2005 International Conference on Microelectronics

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During the past few years, different techniques for development of frequency-selective filters have been developed. Each of these variations has its own merits and disadvantages. However, there is a need to propose a well-organized procedure for design of a digital filter and comparing all implementation methods together and providing the designers with quantitative measures on usability, area, and speed of each method. In this paper, we first go through the digitization procedure of a general digital filter and its optimization using simulated annealing (SA). Also, we introduce different (serial, parallel, bit-level and word-level) implementation-techniques and give a comparative view of the scene. In order to gain a better performance, power and area characteristics, a synthesis technique which simultaneously performs scheduling, binding and module selection is presented, using genetic algorithm (GA). The detailed implementation of these alternatives is compared in terms of delay and area when implemented in a Xilinx Virtex-II FPGA.

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Seat-Occupancy Detection System and Breathing Rate Monitoring Based on a Low-Cost mm-Wave Radar at 60 GHz

et al. 2021

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This work presents a seat-occupancy detection system based on a PCR (Pulsed Coherent Radar) at the unlicensed 60 GHz ISM band. The radar can measure distances with sub-millimeter resolution. Therefore, the system can detect the presence of people occupying the seats by measuring small movements of the body, such as those produced by breathing. In consequence, the system not only measures seatoccupancy but also breathing rate, which is estimated from the amplitude peaks after filtering the amplitude measured by the radar to remove the noise. The effect of the car vibrations and random body movement is experimentally studied. Measurements performed with adults, as well as with a baby emulator sitting in a child seat, are presented. Comparison of the system with another that measures the breath based on airflow shows good agreement and permits its validation.

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Design and implementation of biquad digital filter

Cited by 8 publications

References 1 publication

Driver Filter Design for Software-Implemented Loudspeaker Crossovers

Driver Filter Design for Software-Implemented Loudspeaker Crossovers

A Quantitative Approach to Digital Filter Implementation

Seat-Occupancy Detection System and Breathing Rate Monitoring Based on a Low-Cost mm-Wave Radar at 60 GHz

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