Optimum synchronization of frames with unknown, variable lengths on Gaussian channels
Optimum synchronization of frames with unknown, variable lengths on Gaussian channels
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DOI：
10.1109/glocom.2004.1379134
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发表时间：
2004-11
期刊：
影响因子：
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通讯作者：
M. Chiani;M. Martini
中科院分区：
文献类型：
--
作者：
M. Chiani;M. Martini
本文研究了在帧大小未知且可能逐帧变化的一般情况下，基于同步字的帧同步。我们假设高斯信道具有二进制符号和相干解码，其中软值提供给帧同步器。根据假设检验理论，利用内曼-皮尔逊引理推导出最优似然比检验（LRT）。然后，对测试的性能进行分析评估。所获得的封闭形式表达式还允许推导LRT同步器的接收器工作特性（ROC）曲线，表明基于相关度量的同步获得了显着的增益。
In this paper, we study frame synchronization based on the sync word in the general case when the frame size is unknown and possibly variable on a frame by frame basis. We assume a Gaussian channel with binary symbols and coherent decoding, where soft values are provided to the frame synchronizer. According to the hypothesis testing theory, the optimum likelihood ratio test (LRT) is derived using the Neyman-Pearson lemma. Then, the performance of the test is analytically assessed. The obtained closed form expressions allow also the derivation of the receiver operating characteristic (ROC) curves for the LRT synchronizer, showing that a remarkable gain is obtained with respect to synchronization based on a correlation metric.