FIR filter optimisation as pre-emphasis of high-speed backplane data transmission

Li, M.; Wang, S.; Tao, Yiran; Kwaśniewski, T.

doi:10.1049/el:20040567

Cited by 33 publications

(34 citation statements)

References 2 publications

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“…For the purpose of demonstration, the Tyco 34-inch FR4 backplane [7] was used as the transmission channel. A normalized 1Vpp PRBS 2 II -1 data sequence was transmitted at 10Gbps through the channel.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…However, conventional SSF and DFE only look at bit centers as the optimal sampling points to generate error correction matrices. But at a high data rate, severe channel group delay distortion [7] is a major factor of jitter, which is another lSI contributor in addition to amplitude attenuation. As a result, the received data eyes are no longer peaked at bit centers, and the eye diagrams are no longer symmetric, as illustrated in Fig.l.…”

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confidence: 99%

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ISI mitigation using bit-edge equalization in high-speed backplane data transmission

Zhang

Kwaśniewski

2008

2008 International Conference on Communications, Circuits and Systems

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Section: Simulation Results and Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

ISI mitigation using bit-edge equalization in high-speed backplane data transmission

Zhang

Kwaśniewski

2008

2008 International Conference on Communications, Circuits and Systems

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“…A restriction of most widely implemented FIR filter pre-emphasis transmitters is that the coefficients of the FIR filter have been designed to be either fixed or externally adjustable [4,7,14,15]. Adaptive preemphasis is sought after to automatically adjust filter tap coefficients to provide an easy to use system with high data integrity.…”

Section: Fir Pre-emphasis Filteringmentioning

confidence: 99%

Reducing data dependent jitter utilising adaptive FIR pre-emphasis in 0.18 μm CMOS

Goosen

Sinha

2011

Microelectronics Journal

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Due to advances of technology in multimedia applications in recent years, the demand for high user end bandwidth point to point links has increased significantly. Jitter requirements have become ever more stringent with the increase in high speed serial link data rates. The introduced jitter severely degrades the performance of the high speed serial link. This paper introduces an adaptive FIR pre-emphasis technique as a means to alleviate the problem of limited off-chip bandwidth introducing data dependant jitter. Mathematical as well as SPICE simulation results are presented, together with the implemented integrated circuit layouts of the novel 0.18 μm CMOS implementation. Limited results from the experimentally tested IC are also presented and discussed. The adaptive pre-emphasis technique employed results in a simulated data dependant jitter reduction to less than 12.5 % of a unit interval at a data rate of 5 Gb/s and a modelled 30" FR-4 backplane copper channel.

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“…Normally, the number of taps ranges from 2 to 5 because of power and area constraints. The coefficient of each tap is directly related to the channel characteristic mentioned in the previous sub-section and can be determined adaptively by the least-mean-square (LMS) algorithm [6,7]:…”

Section: Pre-emphasis Filtermentioning

confidence: 99%

“…Crosstalk, on the other hand, is caused by electromagnetic coupling between transmission lines. To counteract ISI, a finite impulse response (FIR) pre-emphasis filter at the transmitter side is widely used to emphasize the signal prior to the impact of the channel [6][7][8]. However, pre-emphasized signal couples more electromagnetic energy into neighboring channels and may exacerbate the crosstalk.…”

Section: Introductionmentioning

confidence: 99%

Worst case timing jitter and amplitude noise in differential signaling

Yao

Shi

et al. 2009

2009 10th International Symposium on Quality of Electronic Design

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Abstract-Differential signaling is widely used in high speed data communications. Inter-symbol interference (ISI) and crosstalk between differential pair, however, heavily affect the integrity of differential signaling as measured by timing jitter and amplitude noise in the eye diagram. To reduce the impact of ISI, a pre-emphasis filter is commonly used, but it increases the crosstalk noise. In this paper, we first propose formula-based jitter and noise models considering the combined effect of ISI, crosstalk, and preemphasis filter. With given input patterns, our models achieve within 5% difference compared to SPICE simulation. Moreover, using the formula-based models, we develop mathematical programming algorithms to directly find out the input patterns for worst-case jitter and worstcase amplitude noise. Experiments show our algorithms obtain more reliable worst-case jitter and noise compared to Monte Carlo simulation and reduce runtime by 150×.

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FIR filter optimisation as pre-emphasis of high-speed backplane data transmission

Cited by 33 publications

References 2 publications

ISI mitigation using bit-edge equalization in high-speed backplane data transmission

ISI mitigation using bit-edge equalization in high-speed backplane data transmission

Reducing data dependent jitter utilising adaptive FIR pre-emphasis in 0.18 μm CMOS

Worst case timing jitter and amplitude noise in differential signaling

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