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Run-length method for determining the segmentation length based on the segmentation long-code blind estimation

机译：基于分段长码盲估计的分段长度确定游程方法

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In this study, the blind despreading of long-code direct sequence spread spectrum signals (LC-DSSS) is considered. Qiu et al. presented a heuristic segmentation-based method to estimate the spreading code of LC-DSSS signals, which divided the received signal into far shorter temporal windows than the symbol duration, then spreading code was reconstructed from these short windows by computing the related covariance matrices. However, Qiu et al. did not consider the criterion of determining the segmentation length. By combining the matrix perturbation theory and run length property, the authors propose a run-length method for determining the segmentation length based on the segmentation idea, and this method can also be applied to long-code direct-sequence code division multiple access (LC-DS-CDMA) signals. Monte Carlo simulations for both LC-DSSS signals and LC-DS-CDMA signals are presented to demonstrate the effectiveness of the proposed method.
机译：在这项研究中，考虑了长码直接序列扩频信号（LC-DSSS）的盲解扩。邱等。提出了一种基于启发式分割的方法来估计LC-DSSS信号的扩展码，该方法将接收到的信号划分为比符号持续时间短得多的时间窗，然后通过计算相关的协方差矩阵从这些短窗中重构出扩展码。然而，邱等人。没有考虑确定分割长度的标准。通过结合矩阵摄动理论和游程长度属性，提出了一种基于分割思想的游程长度确定分割长度方法，该方法也可以应用于长码直接序列码分多址（LC）。 -DS-CDMA）信号。提出了针对LC-DSSS信号和LC-DS-CDMA信号的蒙特卡罗仿真，以证明所提出方法的有效性。

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