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首页> 外文期刊>Applied Acoustics >Multi-array iterative receiver for underwater acoustic OFDM communications with EXIT chart evaluation
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Multi-array iterative receiver for underwater acoustic OFDM communications with EXIT chart evaluation

机译：具有EXIT图评估的水下声OFDM通信的多阵列迭代接收机

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摘要

In this paper, a multi-array iterative receiver based on log-likelihood ratio (LLR)-combining detection involving joint sparse channel estimation and decoding is proposed for underwater acoustic OFDM communication. First, Extrinsic information transfer (EXIT) chart analysis is applied to evaluate the convergence behavior of the iterative receiver using the real data collected from the Kauai Acomms MURI 2011 (KAM11) experiment. This experiment was conducted in about 106 m-depth shallow water west of Kauai, HI, in June 2011, with a 20 kHz bandwidth (12-32 kHz) at range up to 3 km. It helps to explain the impact of different data configurations, detectors, and the diversity combinations in a highly inhomogeneous underwater environment and to predict the bit-error rate (BER) performance of the proposed receiver. Then the BER5 as a function of the number of combined elements are illustrated to verify the prediction and analysis via the EXIT chart. Data transmission using 16QAM modulation achieves a BER of 10(-4) at a data rate of 21 kb/s. The results provide guidance for the design of system parameters including the data configurations, the number of iterations for both iterative processing and low density parity check (LDPC) decoding, which are beneficial to achieve a good efficiency-performance tradeoff. (C) 2016 Elsevier Ltd. All rights reserved.
机译：本文提出了一种基于对数似然比（LLR）组合检测的联合迭代稀疏信道估计和解码的多阵列迭代接收机，用于水下声学OFDM通信。首先，使用从Kauai Acomms MURI 2011（KAM11）实验收集的真实数据，使用外部信息传输（EXIT）图表分析来评估迭代接收器的收敛行为。该实验于2011年6月在夏威夷州考艾岛以西约106 m深度的浅水区中进行，其20 kHz带宽（12-32 kHz）的范围可达3 km。它有助于解释在高度不均匀的水下环境中不同数据配置，检测器和分集组合的影响，并有助于预测所建议接收机的误码率（BER）性能。然后，说明了作为组合元素数量的函数的BER5，以通过EXIT图表验证预测和分析。使用16QAM调制的数据传输以21 kb / s的数据速率实现BER为10（-4）。结果为系统参数的设计提供了指导，包括数据配置，迭代处理和低密度奇偶校验（LDPC）解码的迭代次数，这有助于实现良好的效率-性能折衷。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Applied Acoustics》 |2016年第12期|307-316|共10页
  • 作者

    Zhang Lan; Xu Xiaomei; Feng Wei; Chen Yougan;

  • 作者单位

    Xiamen Univ, Key Lab Underwater Acoust Commun & Marine Informa, Minist Educ, Xiamen 361005, Peoples R China;

    Xiamen Univ, Key Lab Underwater Acoust Commun & Marine Informa, Minist Educ, Xiamen 361005, Peoples R China;

    Zhejiang Univ, Coll Informat Sci & Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China;

    Xiamen Univ, Key Lab Underwater Acoust Commun & Marine Informa, Minist Educ, Xiamen 361005, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    OFDM; Underwater acoustic communications; Multi-array; Iterative receiver; LLR-combining; EXIT chart;

    机译：OFDM;水下声通信;多阵列;迭代接收器;LLR组合;EXIT图;

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