A 0.1–26 GHz SerDes-Based Broadband White Noise Generator for Ethernet Compliance Tests

IF 5.9 2区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Dario Prevedelli;Luca Bergamaschi;Alessandro Acquaviva;Filippo Persia;Roberto G. Massolini
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Abstract

This study introduces a novel SerDes-based broadband noise generator developed to evaluate the robustness of wireline communication links for data center applications. The system supports high-speed transmission rates of 26 and 53 Gbaud. In accordance with Ethernet compliance tests, the generator can produce normally distributed noise with integral output power above −4.4 dBm, ensuring adequate impairment injection into the device under test (DUT). The proposed solution integrates multiple high-bandwidth transmitter (TX) output signals to develop a differential white noise generator. This approach leverages key SerDes components, including the PseudoRandom binary sequence (PRBS) generator and the finite impulse response (FIR) filter, which is configured to achieve a flat output frequency response up to 26 GHz. To ensure the normality of the output signal, the output distribution is theoretically analyzed using the central limit theorem, with results validated through time-domain measurements. The selected SerDes component is an advanced electrooptic re-timer designed to operate in a differential $100~\Omega $ environment. This re-timer can achieve a return loss (RL) below −10 dB across the entire operating bandwidth, ensuring minimal signal reflection and optimal performance. The noise generator, as a result, achieves an overall crest factor (CF) greater than 12 dB, indicating a high peak-to-average power ratio. Moreover, the excess noise ratio (ENR) exceeds 64 dB, highlighting the generator’s capability to produce a significant level of noise above the thermal noise floor. Thanks to FIR filter equalization, the final spectrums exhibit a competitive power density flatness within ±1.6 dB with an overall digital and analog power supply consumption of 815 mW.
用于以太网符合性测试的0.1-26 GHz serdes宽带白噪声发生器
本研究介绍了一种新的基于serdes的宽带噪声发生器,用于评估数据中心应用中有线通信链路的鲁棒性。系统支持26和53 Gbaud的高速传输速率。根据以太网符合性测试,发电机可以产生正态分布的噪声,其积分输出功率在- 4.4 dBm以上,确保对被测设备(DUT)有足够的损伤注入。该方案集成了多个高带宽发射机(TX)输出信号,形成差分白噪声发生器。这种方法利用了关键的SerDes组件,包括伪随机二进制序列(PRBS)发生器和有限脉冲响应(FIR)滤波器,其配置可实现高达26 GHz的平坦输出频率响应。为了保证输出信号的正态性,利用中心极限定理对输出分布进行了理论分析,并通过时域测量对结果进行了验证。所选的SerDes组件是一种先进的电光计时器,设计用于在差分$100~\Omega $环境中工作。该重定时器在整个工作带宽范围内的回波损耗(RL)低于−10 dB,确保最小的信号反射和最佳性能。因此,噪声发生器的总波峰因数(CF)大于12 dB,表明具有较高的峰值-平均功率比。此外,超额噪声比(ENR)超过64 dB,突出了发电机在热噪声底之上产生显著噪声的能力。由于采用FIR滤波器均衡,最终频谱在±1.6 dB内具有竞争力的功率密度平坦度,数字和模拟电源总功耗为815 mW。
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来源期刊
IEEE Transactions on Instrumentation and Measurement
IEEE Transactions on Instrumentation and Measurement 工程技术-工程:电子与电气
CiteScore
9.00
自引率
23.20%
发文量
1294
审稿时长
3.9 months
期刊介绍: Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications. The scope of these papers may encompass: (1) theory, methodology, and practice of measurement; (2) design, development and evaluation of instrumentation and measurement systems and components used in generating, acquiring, conditioning and processing signals; (3) analysis, representation, display, and preservation of the information obtained from a set of measurements; and (4) scientific and technical support to establishment and maintenance of technical standards in the field of Instrumentation and Measurement.
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