Journal ArticleDOI
Stable pole-zero modeling of long FIR filters with application to the MMSE-DFE
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TLDR
A computationally efficient order-recursive algorithm is derived that achieves the approximating a long FIR filter by a reduced-parameter stable pole-zero filter with high accuracy and is applied to reduce the implementation complexity of the decision feedback equalizer's long FIR feedforward and feedback filters encountered in high-speed data transmission on digital subscriber loops.Abstract:
The problem of approximating a long FIR filter by a reduced-parameter stable pole-zero filter is addressed. We derive a computationally efficient order-recursive algorithm that achieves this task with high accuracy. Our main emphasis is on applying this algorithm to reduce the implementation complexity of the decision feedback equalizer's long FIR feedforward and feedback filters encountered in high-speed data transmission on digital subscriber loops.read more
Citations
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Journal ArticleDOI
Noise-predictive maximum likelihood (NPML) detection
TL;DR: Simulation results obtained for Lorentzian channels show that a judicious tradeoff between performance and state complexity leads to practical schemes offering substantial performance gains over both PRML and extended PRML detectors.
Journal ArticleDOI
Reduced complexity decision feedback equalization for multipath channels with large delay spreads
TL;DR: Two modified decision feedback equalization structures are presented for the efficient equalization of long sparse channels with strong precursor, such as those encountered in high-speed communications over multipath channels with large delay spread, overcoming a key computational bottleneck when equalizers are implemented in hardware for speed.
Journal ArticleDOI
A bandwidth-optimized reduced-complexity equalized multicarrier transceiver
Naofal Al-Dhahir,John M. Cioffi +1 more
TL;DR: A bandwidth-optimized and equalized multicarrier transceiver that achieves near-optimum performance at a practical complexity level is described and the intriguing idea of using a pole-zero equalizer to achieve the high performance of long FIR equalizers at a much lower implementation cost is investigated.
Journal ArticleDOI
Efficient decision feedback equalization for sparse wireless channels
TL;DR: A new efficient decision feedback equalizer appropriate for channels with long and sparse impulse response (IR) is proposed, which exhibits considerable computational savings, faster convergence, and improved tracking capabilities as compared with the conventional DFE.
Journal ArticleDOI
Optimal impulse response shortening for discrete multitone transceivers
Changchuan Yin,Guangxin Yue +1 more
TL;DR: In this paper, the authors derived a new algorithm for the optimal shortening of a channel impulse response in discrete multitone (DMT) transceivers using eigenvalues and eigenvectors to generate the coefficients of the shortening impulse response filter (SIRF).
References
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Journal ArticleDOI
A generalized multichannel least squares lattice algorithm based on sequential processing stages
Fuyun Ling,J. Proakis +1 more
TL;DR: It is shown that a muitichannel LS estimation algorithm with a different number of parameters to be estimated in each channel can be implemented by cascading lattice stages of nondescending dimension to form a generalized lattice structure.
Journal ArticleDOI
Fast computation of channel-estimate based equalizers in packet data transmission
Naofal Al-Dhahir,John M. Cioffi +1 more
TL;DR: It is found that a minimum mean-square-error decision-feedback equalizer (MMSE-DFE) with a finite-length constraint on its feedforward and feedback filters can be very efficiently computed from this pulse response.
Proceedings ArticleDOI
Recursive ladder algorithms for ARMA modeling
TL;DR: In this paper, the extension of the all-pole (AR) exact least-squares ladder algorithms to the pole-zero (ARMA) case is presented, based on a general set of recursions obtained by a geometric approach.
Journal ArticleDOI
Pole-zero decision feedback equalization with a rapidly converging adaptive IIR algorithm
Pedro M. Crespo,Michael L. Honig +1 more
TL;DR: A decision feedback equalizer containing a feedback filter with both poles and zeros is proposed for high-speed digital communications over the subscriber loop and results show that the pole-zero DFE offers a significant improvement in mean squared error relative to the conventional DFE.