Simultaneous multichannel time domain equalizer design based on the maximum composite shortening SNR

Milošević, Miloš; Pessoa, L.F.C.; Evans, Brian L.

doi:10.1109/acssc.2002.1197109

Cited by 6 publications

(8 citation statements)

References 11 publications

(2 reference statements)

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“…Various approaches are proposed to find the optimal coefficients of SIRF, w(n), with different design goals [10][11][12][13][14][15][16][17][18]. In Melsa et al [12] and Milosevic et al [13], the design goal is to maximize the shortening signal-to-noise ratio (SNR) which is the ratio of the energy in the largest consecutive n samples to the energy in the remaining samples.…”

Section: Architecture Of the Proposedmentioning

confidence: 99%

Cost-Effective Joint Echo-NEXT Canceller Designs for 10GBase-T Ethernet Systems Based on a Shortened Impulse Response Filter (SIRF) Scheme

Chen

Hsu

Lai

et al. 2007

J Sign Process Syst Sign Image Video Technol

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Abstract. Echo canceller plays an important role in the full-duplex communication system. Conventional implementations of echo cancellers are often the adaptive transversal filter architectures due to the simplicity and robustness of stability and convergence. However, the conventional echo cancellers suffer from high cost problem especially when the response time of the echo is long. In this paper, a new cost-efficient architecture of echo cancellers, targeting on 10GBase-T Ethernet System, is presented. The proposed scheme inherits the concept of channel shortening which is widely employed in DSL systems. A shortened impulse response filter is implemented at the receiver to shorten the impulse response of the echo signal. Hence, the overall cost of echo cancellers can be reduced. We generalize the channel shortening architecture to a joint multi-channel shortening scheme. The joint multi-channel shortening architecture can be applied to multiple-input multiple-output wireline communication systems to further reduce both the cost of echo and near-end crosstalk (NEXT) cancellers. We apply the proposed scheme to 10GBase-T Ethernet system. The simulation results show that the proposed echo and NEXT cancellers can save up to 35% hardware cost compared to the conventional transversal implementations.

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Section: Architecture Of the Proposedmentioning

confidence: 99%

Cost-Effective Joint Echo-NEXT Canceller Designs for 10GBase-T Ethernet Systems Based on a Shortened Impulse Response Filter (SIRF) Scheme

Chen

Hsu

Lai

et al. 2007

J Sign Process Syst Sign Image Video Technol

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“…In [4][6] [7], joint shortening approach is applied to DMT system. The SIRF is used to jointly shorten the channel and echo.…”

Section: B Proposed Joint Shortening Echo and Next Cancellationmentioning

confidence: 99%

A Shortened Impulse Response Filter (SIRF) Scheme for Cost-Effective Echo Canceller Design of 10GBase-T Ethernet System

Hsu

Chen

Jheng

et al. 2006

2006 IEEE Workshop on Signal Processing Systems Design and Implementation

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Abstract-IEEE 802.3an task force is now developing new Ethernet Standard-10GBase-T. Currently, most of the 10Gbps Ethernet is developed with fiber medium due to the fiber high bandwidth. However, the fiber and optical device cost are still too high to be popular. Therefore, our goal is to lower the 10GBase-T transceiver cost. We propose two new low cost 10GBase-T transceiver architectures. One is echo shortening. A Shortened Impulse Response Filter (SIRF) is used to shorten the echo impulse response to reduce the echo canceller cost. The other is joint shortening. The SIRF is used to jointly shorten impulse response of echo and NEXT. Moreover, compare with the conventional architecture, the cost saving of the proposed echo shortening and joint shortening architecture is 12% and 35% respectively.

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“…As another example, multiple receive antennas or oversampling of the received data may be employed. Joint channel shortening has been studied in, e.g., [3], [6], [11], and [12]. However, these works involved extending the trainingbased, non-adaptive designs of [1] - [3] to the MIMO case; whereas this paper considers the blind, adaptive case.…”

Section: Introductionmentioning

confidence: 99%

“…In DSL, joint channel shortening can be combined with multiuser detection to mitigate crosstalk. If a DSL system is operating in echo canceling mode, then the channel and the echo path must be jointly shortened [3], [11]. As another example, multiple receive antennas or oversampling of the received data may be employed.…”

Section: Introductionmentioning

confidence: 99%

Low complexity MIMO blind adaptive channel shortening

Martin

Walsh

Johnson

2004 IEEE International Conference on Acoustics, Speech, and Signal Processing

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Channel shortening is often necessary for mitigation of intersymbol and inter-carrier interference in multicarrier transceivers. The MERRY algorithm has previously been shown to blindly and adaptively shorten a channel to the length of the guard interval in a multicarrier system. In this paper, MERRY is modified to remove the square root and division needed at each iteration, with the added benefit of allowing the use of constraints other than a unit norm equalizer; an extension is proposed which allows for the use of more data in the MERRY update; the algorithm is generalized to the MIMO case; and blind symbol synchronization and initialization techniques are proposed. Simulations demonstrate the success of the algorithm and the synchronization technique in a MIMO setting.

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Simultaneous multichannel time domain equalizer design based on the maximum composite shortening SNR

Cited by 6 publications

References 11 publications

Cost-Effective Joint Echo-NEXT Canceller Designs for 10GBase-T Ethernet Systems Based on a Shortened Impulse Response Filter (SIRF) Scheme

Cost-Effective Joint Echo-NEXT Canceller Designs for 10GBase-T Ethernet Systems Based on a Shortened Impulse Response Filter (SIRF) Scheme

A Shortened Impulse Response Filter (SIRF) Scheme for Cost-Effective Echo Canceller Design of 10GBase-T Ethernet System

Low complexity MIMO blind adaptive channel shortening

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