Efficient Prediction of Equalization Effort and Channel Performance for PCB-Based Data Links

Reuschel, Torsten; Preibisch, Jan B.; Scharff, Katharina; Rimolo-Donadío, Renato; Duan, Xiaomin; Kwark, Young; Schuster, Christian

doi:10.1109/tcpmt.2017.2742703

Cited by 12 publications

(7 citation statements)

References 27 publications

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“…Reflections are addressed in modern links with via back drilling, T-coil matching networks or optimized connector interfaces as presented in [ 10 , 17 ]. Conventional approaches to EQ design are based on time domain simulations along with experimental validation of results in an iterative way until specifications are met [ 10 ]. For a given frequency range, an EQ should fit the following rules: approximately flat transfer function, matched input and output, and low residual losses.…”

Section: Discussionmentioning

confidence: 99%

“…Folding the input signal on a time segment of length equal to the symbol period allows voltage amplitude representation on the vertical axis, while on the horizontal is the time variation that includes typically one or two symbols. Signal distortions are easy to be demonstrated on the eye diagrams [ 10 ]. The closer the eye, the more distortion we have on the signal and larger eye opening implies more margin to the voltage and timing requirements.…”

Section: Methodsmentioning

confidence: 99%

“…The height of the eye should be large enough to ensure the voltage thresholds for high and low levels assuming additive noise additionally degrades the sys- Often, high-speed designs use the eye diagram to evaluate system performance. The construction of the eye diagram assumes slices into sections of the time domain signal waveform followed by overlaying process [5,10]. These sections are considered a small number of symbols in length.…”

Section: Passive Equalizationmentioning

confidence: 99%

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Passive Equalization Networks—Efficient Synthesis Approach for High-Speed Signal Integrity Characterization

Brinaru

2021

Sensors

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High data rates challenges and long traces from current state-of-the-art systems imply high attenuation. In the present article, we will present a detailed process of synthesis of equalizers, for choosing the correct one for a given application. The methods are based on scattering parameters applied on interconnections modeled as microstrip or stripline. Firstly, one may have an overview of types of equalizers, passive, active, and adaptive ones, and a detailed filter synthesis is applied in microwave systems having as start point the insertion loss of a given trace on a given substrate. Next, time domain analyses offer a better understanding of the performance of the interconnect, based on eye diagram inspection and the variation of waveforms with time. Finally, we will present results based on simulation of the equalizers network in a microstrip technology followed by discussions and conclusions. The study proposes to use equalizers in either the transmitter or receiver point, proposes a bridge equalizer with the cost of additional elements but improved constant input, output impedance, and also a new variant for single ended trace based on microwave resonator is proposed. Performance is demonstrated by results from simulations.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Passive Equalizationmentioning

confidence: 99%

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Passive Equalization Networks—Efficient Synthesis Approach for High-Speed Signal Integrity Characterization

Brinaru

2021

Sensors

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“…For example, Fig. 1 illustrates the near-end crosstalk between two adjacent ports of a 44-ports high-speed interconnect [9]. Considering the high oscillatory behaviour, the following assumptions can be made, either on the real or imaginary part of the S-parameters.…”

Section: B Periodic Gaussian Processmentioning

confidence: 99%

Modeling S-parameters of Interconnects using Periodic Gaussian Process Kernels

Garbuglia

Spina

Reuschel

et al. 2023

2023 IEEE 27th Workshop on Signal and Power Integrity (SPI)

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In this paper, we present a novel technique to model wide-band scattering parameter (S-parameter) curves of highspeed digital interconnects. The proposed technique utilizes a new kernel function with periodic components for Gaussian process (GP) models. After proper training, the GP models are able to predict the S-parameter values at arbitrary frequency points inside the trained interval. The performance of the proposed technique is reviewed by means of correlation with standard Gaussian Processes with squared exponential kernel and Matern kernel. Results for the proposed technique show an increased prediction accuracy when applied to interconnects.

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“…The response of the nonlinear system can be accurately constructed through (8), which means that the inter-symbol interference caused by the previous bit pattern to the current bit can be determined and eliminated through MBR.…”

Section: A Construct System Response By Mbrmentioning

confidence: 99%

A Novel Decision Feedback Equalization Structure for Nonlinear High-Speed Links

Chu

Wang

et al. 2020

IEEE Access

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As the degree of nonlinearity in high-speed links becomes more and more serious, traditional decision feedback equalization (DFE) which is based on linear time-invariant assumption can no longer eliminate the inter-symbol interference effectively. In this paper, the shortcomings of traditional DFE structure for nonlinear high-speed links are first analyzed. Then, the multi-bit response (MBR) method is proposed to accurately construct the bit stream responses of the nonlinear high-speed links. Lastly, a novel DFE structure based on the MBR method is presented to improve the signal quality of the nonlinear high-speed links. The accuracy of the proposed method is verified by the simulation based on a nonlinear high-speed link model. Compared with traditional DFE, the proposed DFE structure can significantly improve the signal quality of the nonlinear high-speed links. As the degree of nonlinearity increases, the advantage of the proposed DFE becomes more prominent. INDEX TERMS Decision feedback equalization (DFE), inter-symbol interference (ISI), multi-bit response, nonlinearity, signal integrity.

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Efficient Prediction of Equalization Effort and Channel Performance for PCB-Based Data Links

Cited by 12 publications

References 27 publications

Passive Equalization Networks—Efficient Synthesis Approach for High-Speed Signal Integrity Characterization

Passive Equalization Networks—Efficient Synthesis Approach for High-Speed Signal Integrity Characterization

Modeling S-parameters of Interconnects using Periodic Gaussian Process Kernels

A Novel Decision Feedback Equalization Structure for Nonlinear High-Speed Links

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