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FIR filter optimization using bit-edge equalization in high-speed backplane data transmission

机译:高速背板数据传输中使用位边缘均衡的FIR滤波器优化

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摘要

A unique bit-edge equalization (BEE) method for mitigating intersymbol interference (ISI) in high-speed backplane applications is presented. Using a least-mean-square (LMS) adaptive algorithm as a receiver (RX) error convergence engine, the proposed BEE method aims to optimize the bit-edge amplitudes by equalizing only the edges of data bits with an adjustment of the sampling points where the error information is collected. This adjustment of sampling points in turn changes the error information and affects filter coefficients for pulse amplitude modulation. As a result, the channel's far-end 3-level bit-edge eye diagrams can be optimized. This proposed BEE method employs transmitter (TX) pre-coding in conjunction with TX pre-emphasis using a symbol-spaced FIR (SSF) filter. In this work, a detailed analytical comparison of the proposed BEE transceiver architecture with the conventional NRZ bit-centre equalization (BCE) and duobinary transceiver architectures is presented. The simulation results demonstrate that at 10+Gbps data rates, the proposed BEE is the most effective method for mitigating ISI in relatively high-loss channels.
机译:提出了一种独特的比特边缘均衡(BEE)方法,用于减轻高速背板应用中的符号间干扰(ISI)。拟议的BEE方法使用最小均方(LMS)自适应算法作为接收器(RX)误差收敛引擎,旨在通过仅对数据位的边缘进行均衡并调整采样点来优化位边缘幅度。错误信息被收集。采样点的这种调整又改变了误差信息,并影响了脉冲幅度调制的滤波器系数。结果,可以优化通道的远端3级位边缘眼图。提出的BEE方法结合使用符号间隔FIR(SSF)滤波器的TX预加重,使用发射机(TX)预编码。在这项工作中,将对建议的BEE收发器架构与常规NRZ比特中心均衡(BCE)和双二进制收发器架构进行详细的分析比较。仿真结果表明,在10 + Gbps数据速率下,建议的BEE是缓解较高损耗信道中ISI的最有效方法。

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