Adapting horizon size in finite impulse response filtering through switching extensible FIR filter bank

2014 ◽  
Author(s):  
Jung Min Pak ◽  
Choon Ki Ahn ◽  
Myo Taeg Lim ◽  
Yuriy S. Shmaliy
Keyword(s):  
Impulse Response ◽  
Filter Bank ◽  
Finite Impulse Response ◽  
Fir Filter

FINITE IMPULSE RESPONSE DOUBLE DENSITY FILTER BANKS AND FRAMELETS

2013 ◽  
Vol 11 (01) ◽  
pp. 1350010
Author(s):  
ASHOKA JAYAWARDENA ◽  
PAUL KWAN
Keyword(s):  
Wavelet Transform ◽  
Impulse Response ◽  
Filter Bank ◽  
Filter Banks ◽  
Finite Impulse Response ◽  
Wavelet Filters ◽  
Density Filter ◽  
Shift Invariance ◽  
Factorization Methods ◽  
Invariant Properties

In this paper, we focus on the design of oversampled filter banks and the resulting framelets. The framelets obtained exhibit improved shift invariant properties over decimated wavelet transform. Shift invariance has applications in many areas, particularly denoising, coding and compression. Our contribution here is on filter bank completion. In addition, we propose novel factorization methods to design wavelet filters from given scaling filters.

Low Power Transposed Form 4-Tap Finite Impulse Response Filter using Power Efficient Multiply Accumulate Unit

2021 ◽  
pp. 2250016
Author(s):  
S. Rakesh ◽  
K. S. Vijula Grace
Keyword(s):  
Low Power ◽  
Impulse Response ◽  
Speech Processing ◽  
Video Processing ◽  
Filter Design ◽  
Finite Impulse Response ◽  
Low Power Design ◽  
Fir Filter ◽  
Efficient Design ◽  
Power Efficient

Finite impulse response (FIR) filters find wide application in signal processing applications on account of the stability and linear phase response of the filter. These digital filters are used in applications, like biomedical engineering, wireless communication, image processing, speech processing, digital audio and video processing. Low power design of FIR filter is one of the major constraints that researchers are trying hard to achieve. This paper presents the implementation of a novel power efficient design of a 4-tap 16-bit FIR filter using a modified Vedic multiplier (MVM) and a modified Han Carlson adder (MHCA). The units are coded using Verilog hardware description language and simulated using Xilinx Vivado Design Suite 2015.2. The filter is synthesized for the 7-series Artix field programmable gate array with xc7a100tcsg324-1 as the target device. The proposed filter design showed an improvement of a maximum of 57.44% and a minimum of 2.44% in the power consumption compared to the existing models.

scholarly journals Adaptive Compensation of Bandwidth Narrowing Effect for Coherent In-Phase Quadrature Transponder through Finite Impulse Response Filter

2019 ◽  
Vol 9 (9) ◽  
pp. 1950 ◽  
Author(s):  
Qiang Wang ◽  
Yang Yue ◽  
Jian Yao ◽  
Jon Anderson
Keyword(s):  
Optical Networks ◽  
Impulse Response ◽  
Finite Impulse Response ◽  
Chromatic Dispersion ◽  
Polarization Mode Dispersion ◽  
Fir Filter ◽  
Coherent Signal ◽  
Analog To Digital ◽  
Mode Dispersion ◽  
Adaptively Adjusting

Coherent in-phase quadrature (IQ) transponders are ubiquitous in the long-haul and the metro optical networks. During the transmission, the coherent signal experiences a bandwidth narrowing effect after passing through multiple reconfigurable optical add-drop multiplexers (ROADMs). The coherent signal also experiences a bandwidth narrowing effect when electrical or optical components of the coherent IQ transponder experience aging. A dynamic method to compensate the bandwidth narrowing effect is thus required. In the coherent optical receiver, signal bandwidth is estimated from the raw analog-to-digital converter (ADC) outputs. By adaptively adjusting the tap coefficients of the finite impulse response (FIR) filter, simple post-ADC FIR filters can increase the resiliency of the coherent signal to the bandwidth narrowing effect. The influence of chromatic dispersion, polarization mode dispersion, and polarization dependent loss are studied comprehensively. Furthermore, the bandwidth information of the transmitted analog signal is fed back to the coherent optical transmitter for signal optimization, and the transmitter-side FIR filter thus changes accordingly.

Real-time accurate pedestrian tracking using extended finite impulse response filter bank for tightly coupling recent inertial navigation system and ultra-wideband measurements

2018 ◽  
Vol 232 (4) ◽  
pp. 464-472 ◽  
Author(s):  
Yuan Xu ◽  
Hamid Reza Karimi ◽  
Yueyang Li ◽  
Fengyu Zhou ◽  
Lili Bu
Keyword(s):  
Impulse Response ◽  
Navigation System ◽  
Filter Bank ◽  
Inertial Navigation System ◽  
Finite Impulse Response ◽  
Inertial Navigation ◽  
Finite Impulse Response Filter ◽  
Ultra Wideband ◽  
Pedestrian Tracking ◽  
Impulse Response Filter

To satisfy the increasing demands of the accuracy for the human localization, in this work, we propose a pedestrian tracking method by tightly coupling recent inertial navigation system–based and ultra-wideband–based measurements. In this mode, the difference between the distances derived from the inertial navigation system–based and ultra-wideband–based system is used as the observation of the data fusion filter. Moreover, in order to improve the performance of the extended finite impulse response filter, which depends on the averaging horizon ([Formula: see text]) when the error state vector ([Formula: see text]) is determined due to the model, the extended finite impulse response filter bank is employed to be the fusion center for pedestrian tracking, which used the Mahalanobis distance to find the optimal [Formula: see text] at each time index [Formula: see text]. Test experiments illustrate that the extended finite impulse response filter bank–based tightly coupled inertial navigation system/ultra-wideband–integrated method is able to achieve real-time estimation, and its accuracy is similar to the extended finite impulse response with the ideal [Formula: see text] which is calculated off-line.

AREA REDUCTION TECHNIQUES FOR PARALLEL FIR FILTER WITH SYMMETRIC COEFFICIENTS.

2015 ◽  
pp. 218-222
Author(s):  
SITHARA KRISHNAN
Keyword(s):  
Impulse Response ◽  
Finite Impulse Response ◽  
Fir Filter ◽  
Higher Order ◽  
Hardware Complexity ◽  
Silicon Area ◽  
Area Reduction ◽  
Reduction Techniques ◽  
Filter Structure ◽  
Ripple Carry Adder

The objective of the paper is to reduce the hardware complexity of higher order FIR filter with symmetric coefficients. The aim is to design efficient Fast Finite-Impulse Response (FIR) Algorithms (FFAs) for parallel FIR filter structure with the constraint that the filter tap must be a multiple of 2. The parallel FIR filter structure based on proposed FFA technique has been implemented based on carry save and ripple carry adder for further optimization. The reduction in silicon area complexity is achieved by eliminating the bulky multiplier with an adder namely ripple carry and carry save adder. For example, for a 6-parallel 1024-tap filter, the proposed structure saves 14 multipliers at the expense of 10 adders, whereas for a six-parallel 512-tap filter, the proposed structure saves 108 multipliers at the expense of 10 adders. Overall, the proposed parallel FIR structures can lead to significant hardware savings for symmetric coefficients from the existing FFA parallel FIR filter, especially when the length of the filter is very large.

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