Search results for: Yong Ching Lim

Items from 1 to 20 out of 45 results

chapter

Design of sparse frequency-response masking filters with arbitrary delay using li-Minimization

Qinglai Liu, Yong Ching Lim, Zhiping Lin

2017 22nd International Conference on Digital Signal Processing (DSP) > 1 - 4

2017 22nd International Conference on Digital Signal Processing (DSP)

The frequency-response masking (FRM) filters can achieve arbitrary delay if all of the subfilters are nonlinear phase finite impulse response (FIR) filters. However, its arithmetic complexity is inevitably increased. In this paper, we propose a three-stage method to increase the number of zero-valued coefficients. In Stage I and Stage II of our approach, the l₁-norm of the coefficient values is included...

chapter

Design of IIR frequency-response masking filters with near linear phase using constrained optimization

Qinglai Liu, Yong Ching Lim, Zhiping Lin, Xiaoping Lai

2017 IEEE International Symposium on Circuits and Systems (ISCAS) > 1 - 4

2017 IEEE International Symposium on Circuits and Systems (ISCAS)

IIR frequency-response masking (FRM) filter where the prototype filter is an IIR filter and the masking filters are FIR filters is effective in reducing the group delay of FRM filters. In this paper, we present a constrained optimization method for the design of near linear phase IIR FRM filters, where the phase error and magnitude error are independently controlled. A design example is presented...

chapter

Effect of pole-radius in a piloted adaptive notch filter

Dinesh Kumar Chobey, Yong Ching Lim

2016 IEEE International Conference on Digital Signal Processing (DSP) > 618 - 622

2016 IEEE International Conference on Digital Signal Processing (DSP)

In this paper, we have presented a detailed analysis of pole position approximation for pilot notches to understand its overall effect on steering direction determination and convergence of the notch filter. We have introduced an improved piloted adaptive notch filter with transient suppression and a higher probability of correct steering direction. The concept of variable pole-radius has been employed...

article

Recursive Filters for Time-Interleaved ADC Mismatch Compensation

Saihua Xu, Yong Ching Lim, Jun Wei Lee

IEEE Transactions on Circuits and Systems I: Regular Papers > 2016 > 63 > 6 > 848 - 858

Time-interleaved analog-to-digital converter (TIADC) mismatch compensation filters are traditionally finite impulse response (FIR) filters. The advantages of using FIR filters are that FIR filters are inherently stable and that the design techniques are readily available. This paper demonstrates that infinite impulse response (IIR) filters can be designed to compensate for the mismatch error in the...

chapter

A multi-piloted notch filter for frequency estimation and tracking

Dinesh Kumar Chobey, Yong Ching Lim

2015 IEEE International Conference on Digital Signal Processing (DSP) > 848 - 852

2015 IEEE International Conference on Digital Signal Processing (DSP)

In this paper, we have presented a multi-piloted notch filter structure with the generalized formulation for introduction of more number of pilots to the original piloted notch filter having an option for a range of step-size values. The structure of multi-piloted notch filter has been studied through simulations to make it more adaptive by using multiple step-size values. Thus, the transition from...

chapter

Recursive filters for compensating the mismatch in time-interleaved ADCs

Yong Ching Lim, Saihua Xu, Jun Wei Lee

2015 IEEE International Conference on Digital Signal Processing (DSP) > 324 - 328

2015 IEEE International Conference on Digital Signal Processing (DSP)

Time-interleaved analog-to-digital converter (TIADC) mismatch compensation filters are traditionally finite impulse response (FIR) filters. The advantages of using FIR filters are that FIR filters are inherently stable and that the design techniques are readily available. In this paper, we show that, infinite impulse response (IIR) mismatch compensation filters with guaranteed stability can be designed...

chapter

A piloted notch time-frequency information based variable step-size algorithm

Dinesh Kumar Chobey, Yong Ching Lim

2015 IEEE International Symposium on Circuits and Systems (ISCAS) > 2201 - 2204

2015 IEEE International Symposium on Circuits and Systems (ISCAS)

In this paper, we have proposed a new steering direction determination mechanism and step-size update algorithm for piloted adaptive notch filter architecture. A timedomain averaging based gradient analysis of the piloted notch cost function has been utilized to determine the direction of the main notch with respect to the input sinusoid frequency. The steering direction will indicate the distance...

chapter

All-pass based robust low complexity structures for implementing recursive digital filters

Gang Li, Yong Ching Lim, Chaogeng Huang

2014 IEEE International Symposium on Circuits and Systems (ISCAS) > 974 - 977

2014 IEEE International Symposium on Circuits and Systems (ISCAS)

A simplified version of a recently developed structure is derived for all-pass filters. The proposed structure possesses 4N non-trivial multipliers and 2N adders used for computing one output sample of an Nth order all-pass filter. It is shown that such a structure yields a roundoff noise gain of 4N, compared with that of (N +1)² for the classical minimum roundoff noise realizations that have in general...

chapter

A Hessenberg-based input balanced realization for all-pass systems

Tao Hong, Chaogeng Huang, Gang Li, Yong Ching Lim

2013 9th International Conference on Information, Communications & Signal Processing > 1 - 5

2013 9th International Conference on Information, Communications & Signal Processing (ICICS)

In this paper, a novel Hessenberg-based input balanced realization for all-pass systems is derived. The expression of roundoff noise gain for this structure is obtained. An Nth order system implemented with a coupled all-pass sub-filters proposed in [18], in which each all-pass filter is realized using our proposed structure, yields a roundoff noise gain of N + 1, smaller than that of the classical...

chapter

Error spectrum shaping approach for lattice filter roundoff noise reduction

Yong Ching Lim, Chaogeng Huang, Gang Li, Hong Xu, more

2013 IEEE International Symposium on Circuits and Systems (ISCAS2013) > 85 - 88

2013 IEEE International Symposium on Circuits and Systems (ISCAS)

This paper presents an approach for digital lattice filter roundoff noise reduction using error spectrum shaping (ESS). ESS roundoff noise expression for the one-, two-, three-, and four-multiplier lattice structures are derived. A numerical example for demonstrating the performance of the proposed ESS noise reduction in lattice filters is also presented.

chapter

Massively parallel time-stretched analog-to-digital converter

Saihua Xu, Yong Ching Lim, Jia Haur Wong, Quoc Huy Lam

2013 Constantinides International Workshop on Signal Processing (CIWSP 2013) > 1 - 4

2013 Constantinides International Workshop on Signal Processing (CIWSP 2013)

Time interleaving is an effective method for increasing the sampling rate of electronic analog-to-digital converters (ADCs). The main artifact of time-interleaved ADC (TI-ADC) is caused by mismatches between different sub-ADC channels. The mismatches include mismatches in gain, bandwidth, and frequency response. The ultimate achievable bandwidth of the TI-ADC is limited by the bandwidth of the sample-and-hold...

chapter

A novel digital IIR filter design strategy - Structure-based discrete coefficient filters

Gang Li, Yong Ching Lim, Chaogeng Huang, Hong Xu

2012 IEEE International Symposium on Circuits and Systems > 37 - 40

2012 IEEE International Symposium on Circuits and Systems - ISCAS 2012

Most of the existing design methods for digital filters that are to be implemented with finite precision device are given by two independent stages. The first stage is to determine a transfer function (in infinite precision) that meets the specifications given, while the second one is to choose a proper filter structure to reduce finite wordlength (FWL) errors as much as possible. In this paper, we...

article

Timing Mismatch Compensation in Time-Interleaved ADCs Based on Multichannel Lagrange Polynomial Interpolation

Yue Xian Zou, Shang Liang Zhang, Yong Ching Lim, Xiao Chen

IEEE Transactions on Instrumentation and Measurement > 2011 > 60 > 4 > 1123 - 1131

In this paper, the timing mismatch compensation problem in the implementation of a time-interleaved analog-to-digital converter (TIADC) is investigated. The investigation leads to a novel multichannel Lagrange polynomial interpolation timing-mismatch compensation algorithm (MLPI-TMCA). A multichannel Lagrange compensation filter (MLCF) in the form of a finite-impulse response (FIR) filter is also...

article

Implementation of Linear-Phase FIR Filters for a Rational Sampling-Rate Conversion Utilizing the Coefficient Symmetry

Robert Bregović, Ya Jun Yu, Tapio Saramäki, Yong Ching Lim

IEEE Transactions on Circuits and Systems I: Regular Papers > 2011 > 58 > 3 > 548 - 561

This paper proposes an efficient structure for implementing a linear-phase finite-impulse-response (FIR) filter of an arbitrary order N for the sampling-rate conversion by a rational factor of L/M , where L(M) is the integer upsampling (down-sampling) factor to be performed before (after) the actual filter. In this implementation, the coefficient symmetry of the linear-phase filter is exploited as...

article

Low complexity frequency-response masking filters using modified structure based on serial masking

Tian Shen, Yong Ching Lim

02011 00019th European Signal Processing Conference > 2011 > 1400 - 1404

2011 19th European Signal Processing Conference

This paper presents a technique to synthesize low-complexity high-selectivity arbitrary-bandwidth finite impulse response (FIR) digital filters using the frequency-response masking (FRM) technique. A serial masking scheme is used to perform the masking task in two stages lowering the complexity of the masking filters. The bandedge shaping filter is implemented as a prefilter-equalizer cascade lowering...

chapter

Recursive digital filter design based on FRM approach

Tian Shen, Yong Ching Lim

2010 Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics (PrimeAsia) > 217 - 220

2010 Second Asia Pacific Conference on Postgraduate Research in Microelectronics & Electronics (PrimeAsia 2010)

This paper presents a technique for the synthesis of very sharp IIR filter using the frequency response masking (FRM) technique. Both the bandedge shaping and masking filters are recursive filters. The filter is optimized jointly using semi-infinite programming. Bounded input bounded output (BIBO) stability is ensured by imposing constraints on the multiplier coefficients during the optimization process...

chapter

Novel low complexity lattice filters with overflow property close to the normalized lattice

Gang Li, Yong Ching Lim, Chaogeng Huang, Shuqin Guo

Proceedings of 2010 IEEE International Symposium on Circuits and Systems > 725 - 728

2010 IEEE International Symposium on Circuits and Systems. ISCAS 2010

The excellent finite wordlength property of the lattice digital filter is well known. The four-multiplier normalized lattice, with signal power at all delay elements normalized to unity, has particular advantage in its overflow property. However, when used to implement an Nth order digital filter, the normalized lattice implementation requires 5N +1 multipliers. In this paper, we present a novel lattice...

article

Very Robust Low Complexity Lattice Filters

Gang Li, Yong Ching Lim, Chaogeng Huang

IEEE Transactions on Signal Processing > 2010 > 58 > 12 > 6093 - 6104

In this paper, a novel lattice filter structure is derived by combining the “tapped numerator” and “injected numerator” lattices [Y. C. Lim, “On the Synthesis of IIR Digital Filters Derived From Single Channel AR Lattice Network,” IEEE Trans. Acoust., Speech, Signal Process., vol. ASSP-32, no. 4, pp. 741-749, August 1984]. The injector coefficients are optimized for finite wordlength performance while...

article

Implementation of Linear-Phase FIR Nearly Perfect Reconstruction Cosine-Modulated Filterbanks Utilizing the Coefficient Symmetry

R. Bregovic, Ya Jun Yu, A. Viholainen, Yong Ching Lim

IEEE Transactions on Circuits and Systems I: Regular Papers > 2010 > 57 > 1 > 139 - 151

The analysis and synthesis parts of a cosine-modulated M-channel filterbank (FB) contain two sections, a modulation block and a prototype filter implemented in a polyphase structure. Although, in many cases, a linear-phase prototype filter is used, the coefficient symmetry of this filter is not utilized when using the existing polyphase structure. In this paper, a method is proposed for implementing...

article

Optimization of Linear Phase FIR Filters in Dynamically Expanding Subexpression Space

Ya Jun Yu, Yong Ching Lim

Circuits, Systems, and Signal Processing > 2010 > 29 > 1 > 65-80

The most advanced techniques in the design of multiplierless finite impulse response (FIR) filters explore common subexpression sharing when the filter coefficients are optimized. Existing techniques, however, either suffer from a heavy computational overhead, or have no guarantees on the minimal hardware cost in terms of the number of adders. A recent technique capable of designing long filters optimizes...

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Keywords

FIR FILTERS (14)
FREQUENCY RESPONSE (13)
FINITE IMPULSE RESPONSE FILTER (12)
DIGITAL FILTERS (10)
COMPLEXITY THEORY (8)
OPTIMIZATION (8)
IIR FILTERS (7)
TRANSFER FUNCTIONS (7)
DELAY (6)
COMPUTATIONAL COMPLEXITY (5)
NOISE (5)
PASSBAND (5)
ALGORITHM DESIGN AND ANALYSIS (4)
CHANNEL BANK FILTERS (4)
DELAYS (4)
EDUCATIONAL INSTITUTIONS (4)
FILTER BANK (4)
FILTERING THEORY (4)
INTEGER PROGRAMMING (4)
LINEAR PROGRAMMING (4)
SUBEXPRESSION SPACE (4)
ADDERS (3)
ANALOGUE-DIGITAL CONVERSION (3)
BANDWIDTH (3)
COEFFICIENT SYMMETRY (3)
COMMON SUBEXPRESSION SHARING (3)
FAST FILTER BANK (3)
FINITE IMPULSE RESPONSE FILTERS (3)
FIR FILTER (3)
FREQUENCY-RESPONSE MASKING (3)
LATTICES (3)
LINEAR PHASE FILTERS (3)
MIXED INTEGER LINEAR PROGRAMMING (3)
NONLINEAR FILTERS (3)
PROTOTYPES (3)
RECURSIVE FILTERS (3)
ROUNDOFF ERRORS (3)
SENSITIVITY (3)
SIGNAL PROCESSING (3)
ANALOG-TO-DIGITAL CONVERSION (2)
COMPENSATION (2)
CUTOFF FREQUENCY (2)
DIGITAL FILTER (2)
DIGITAL FILTER STRUCTURES (2)
DIGITAL SIGNAL PROCESSING (2)
EXTRAPOLATION (2)
FINITE-IMPULSE RESPONSE (FIR) FILTERS (2)
FREQUENCY RESPONSE MASKING (2)
FREQUENCY-RESPONSE MASKING TECHNIQUE (2)
IIR FILTER (2)
LATTICE FILTERS (2)
LINEAR-PHASE FIR FILTERS (2)
MASKING FILTERS (2)
MULTICHANNEL FILTER (2)
MULTIRATE SYSTEM (2)
NOISE REDUCTION (2)
OPTIMISATION (2)
PROBABILITY DENSITY FUNCTION (2)
RESIDUAL COMPENSATION (2)
ROUNDOFF NOISE ANALYSIS (2)
SAMPLING METHODS (2)
SHARP FILTER (2)
SIGNAL SAMPLING (2)
SIGNAL TO NOISE RATIO (2)
SPARSE COEFFICIENT FILTER (2)
TIME SERIES ANALYSIS (2)
TIME-INTERLEAVED (2)
TIME-INTERLEAVED ADC (2)
TIMING (2)
ADAPTIVE FILTERING (1)
ADAPTIVE FILTERS (1)
ADAPTIVE SIGNAL PROCESSING (1)
ALL-PASS FILTER (1)
ALL-PASS FILTERS (1)
ANALOG-DIGITAL CONVERSION (1)
ARBITRARY ORDER (1)
ARITHMETIC (1)
ATTENUATION (1)
BAND PASS FILTERS (1)
BANDEDGE SHAPING (1)
BANDEDGE-SHAPING (1)
BENCHMARK FILTERS (1)
BIBO (1)
BINARY ARITHMETIC (1)
BOUNDED INPUT BOUNDED OUTPUT STABILITY (1)
BUILDINGS (1)
CAPACITORS (1)
CASCADED TWO-CHANNEL SUBFILTERS (1)
CIRCUIT DESIGN (1)
CIRCUIT OPTIMISATION (1)
CIRCUIT STABILITY (1)
CIRCUITS (1)
CLOCKS (1)
COEFFICIENT SENSITIVITY (1)
COEFFICIENT WORDLENGTH (1)
COMPUTER SIMULATION (1)
COMPUTERISED PICTURE PROCESSING (1)
CONSTRAINED ADDER DEPTH (1)
CONVERGENCE (1)
CONVERTERS (1)
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Springer (5)
Elsevier (1)

INFONA - science communication portal

Search results for: Yong Ching Lim

Design of sparse frequency-response masking filters with arbitrary delay using li-Minimization

Design of IIR frequency-response masking filters with near linear phase using constrained optimization

Effect of pole-radius in a piloted adaptive notch filter

Recursive Filters for Time-Interleaved ADC Mismatch Compensation

A multi-piloted notch filter for frequency estimation and tracking

Recursive filters for compensating the mismatch in time-interleaved ADCs

A piloted notch time-frequency information based variable step-size algorithm

All-pass based robust low complexity structures for implementing recursive digital filters

A Hessenberg-based input balanced realization for all-pass systems

Error spectrum shaping approach for lattice filter roundoff noise reduction

Massively parallel time-stretched analog-to-digital converter

A novel digital IIR filter design strategy - Structure-based discrete coefficient filters

Timing Mismatch Compensation in Time-Interleaved ADCs Based on Multichannel Lagrange Polynomial Interpolation

Implementation of Linear-Phase FIR Filters for a Rational Sampling-Rate Conversion Utilizing the Coefficient Symmetry

Low complexity frequency-response masking filters using modified structure based on serial masking

Recursive digital filter design based on FRM approach

Novel low complexity lattice filters with overflow property close to the normalized lattice

Very Robust Low Complexity Lattice Filters

Implementation of Linear-Phase FIR Nearly Perfect Reconstruction Cosine-Modulated Filterbanks Utilizing the Coefficient Symmetry

Optimization of Linear Phase FIR Filters in Dynamically Expanding Subexpression Space

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