一种归一化点积功率型伪码跟踪鉴相算法

A Normalization DOT Discriminator Algorithm for PN Code Tracking Loop

  • 摘要: 具有点积功率型鉴相算法的非相干伪码跟踪环克服了增益不平衡的影响,但没有线性范围,不具有相干码环的优点,且跟踪速度比传统的码跟踪环低. 为了解决这些问题,作者提出了一种非相干的归一化点积功率型鉴相算法. 该算法采用非相干码环结构,而本质上是相干的,其既对载波的依赖程度不高又有较大的线性范围. 仿真实验表明,采用新算法的码环具有较快的跟踪速度,在性能上优于已有的鉴相算法.

     

    Abstract: The noncoherent code tracking loop with DOT discriminator algorithm is insensitive to gain imbalance. However, it does not have the advantages of code tracking loop with coherent algorithm since its algorithm is nonlinear, and its tracking speed is lower than that of the traditional code tracking loop. In order to overcome these disadvantages, a noncoherent normalization DOT discriminator algorithm is proposed. The new algorithm uses the structure of noncoherent code tracking loop, whereas it is coherent in essence. Thus, it relies on the carrier to a low degree and has larger linear range. The simulation results indicate that, compared with the existing discriminators, the code tracking loop with new algorithm has faster tracking speed and better performance.

     

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