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Alpha稳定分布噪声下基于柯西分布的相位键控信号码速率最大似然估计

金艳 朱敏 姬红兵

金艳, 朱敏, 姬红兵. Alpha稳定分布噪声下基于柯西分布的相位键控信号码速率最大似然估计[J]. 电子与信息学报, 2015, 37(6): 1323-1329. doi: 10.11999/JEIT141180
引用本文: 金艳, 朱敏, 姬红兵. Alpha稳定分布噪声下基于柯西分布的相位键控信号码速率最大似然估计[J]. 电子与信息学报, 2015, 37(6): 1323-1329. doi: 10.11999/JEIT141180
Jin Yan, Zhu Min, Ji Hong-bing. Cauchy Distribution Based Maximum-likelihood Estimator for Symbol Rate of Phase Shift Keying Signals[J]. Journal of Electronics and Information Technology, 2015, 37(6): 1323-1329. doi: 10.11999/JEIT141180
Citation: Jin Yan, Zhu Min, Ji Hong-bing. Cauchy Distribution Based Maximum-likelihood Estimator for Symbol Rate of Phase Shift Keying Signals[J]. Journal of Electronics and Information Technology, 2015, 37(6): 1323-1329. doi: 10.11999/JEIT141180

Alpha稳定分布噪声下基于柯西分布的相位键控信号码速率最大似然估计

doi: 10.11999/JEIT141180
基金项目: 

国家自然科学基金(61201286),陕西省自然科学基金(2014JM8304)和中央高校基本科研业务费专项资金(K5051202013)资助课题

Cauchy Distribution Based Maximum-likelihood Estimator for Symbol Rate of Phase Shift Keying Signals

  • 摘要: 针对现有的相位键控(PSK)编码信号码速率估计方法在Alpha稳定分布中性能严重退化的问题,该文提出一种基于柯西分布的码速率最大似然估计(CMLE)新方法,该方法可同时估计码速率与定时偏差。CMLE利用窗口法将信号划分为定时偏差窗和多个宽度一定的非重叠且已同步的时域窗,每个窗只包含一个码元符号;在Alpha稳定分布噪声下,利用窗中符号信息构造了基于柯西分布的似然函数,可同时获得定时偏差窗宽与码元符号窗宽的最大似然估计。仿真结果表明,该方法能有效抑制Alpha稳定分布噪声并具有良好的参数估计性能。
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出版历程
  • 收稿日期:  2014-09-10
  • 修回日期:  2014-12-25
  • 刊出日期:  2015-06-19

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