SPC03-3: A MIMO-MLSE Receiver for Electronic Dispersion Compensation of Multimode Optical Fibers
SPC03-3: A MIMO-MLSE Receiver for Electronic Dispersion Compensation of Multimode Optical Fibers
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DOI：
10.1109/glocom.2006.546
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发表时间：
2006-11
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影响因子：
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通讯作者：
D. Crivelli;H. Carrer;M. Hueda;O. Agazzi
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文献类型：
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作者：
D. Crivelli;H. Carrer;M. Hueda;O. Agazzi
在本文中，我们提出了一种多输入，多输出（MIMO）的最大似然序列估计（MLSE）接收机的电子色散补偿（EDC）的多模光纤在10 Gb/s的数据速率。作为这里介绍的技术的有效性的主要例子，我们提出了一个接收器的新兴10 GBASE-LRM标准的10 Gb/s以太网多模光纤[1]。我们证明，在99%的局域网（LAN）多模光纤数量上，MLSE接收机比其他接收机（例如决策反馈均衡器（DFE））提供至少2dB的优势，正如IEEE提出的数据库所建模的那样802.3aq任务组[2]。本文论述了该体系结构的理论和实践方面。为了使该接收器作为一个单一的芯片在当前的90 nm CMOS技术的完整集成，我们提出了并行处理的前馈均衡器（FFE）和维特比解码器的数字实现，以及交错前端模数转换器（ADC）。MIMO结构共同补偿基本信道损伤，例如多模色散，以及与实现相关的影响，例如模拟前端（AFE）的限制，特别是称为固定模式噪声（FPN）的限制[3]。由于高速运行，FPN对性能有重大影响。我们发现，在没有补偿的情况下，FPN可能会导致7.86 dB的退化。利用这里提出的补偿，后者被降低到0.23 dB。
In this paper we propose a multiple-input, multiple-output (MIMO) maximum-likelihood sequence estimation (MLSE) receiver for electronic dispersion compensation (EDC) of multimode optical fibers at 10 Gb/s data rate. As the primary example of the effectiveness of the techniques introduced here we present a receiver for the emergent 10 GBASE-LRM standard for 10 Gb/s Ethernet over multimode optical fibers [1]. We show that an MLSE receiver provides an advantage of at least 2 dB over other receivers, such as the decision-feedback equalizer (DFE), on 99% of the local area network (LAN) multimode fiber population, as modeled by a database proposed by the IEEE 802.3aq Task Force [2]. The paper deals with both theoretical and practical aspects of the architecture. To enable the complete integration of this receiver as a single chip in current 90 nm CMOS technology, we propose the parallel-processing digital implementation of a feedforward equalizer (FFE) and a Viterbi decoder together with an interleaved front-end analog to digital converter (ADC). The MIMO structure jointly compensates for fundamental channel impairments such as multimode dispersion, and implementation-related effects such as the limitations of the analog front end (AFE), particularly the one known as fixed-pattern noise (FPN) [3]. As a result of the high speed operation, FPN has a major impact on performance. We show that, without compensation, FPN could result in a degradation of 7.86 dB. With the compensation proposed here, the latter is reduced to 0.23 dB.