P码直接捕获算法的设计及资源优化

P Code Direct Acquisition Algorithm and Its Resource Optimization Method

针对P码直接捕获消耗资源较多的问题,提出了一种资源优化的方法。该方法在检测概率、虚警概率和捕获时间满足系统要求的约束下,对存储资源、乘法器资源与逻辑资源进行多目标的优化,并通过兼容FFT快速捕获法与延迟相乘法的特点,能够自由地分配时域与频率搜索的并行度,因此该方法能够适用于各种形状的二维不确定域搜索任务,更有效地对资源消耗进行优化。

To reduce the resource consumption, an optimization method is proposed for the P code direct acquisition. Under the condition of constraints of detection probability, false alarm probability and acquisition time to meet the system requirements, the method makes both single and multiple objective optimization to minimize the memory resources, multiplier resources and logic resources. And by combining characteristics of the FFT fast acquisition method and the delaymultiply method, the proposed method can freely assign searching parallelism in both time domain and frequency domain. So the method is common to many acquisition tasks with different shapes of the captured region, and the resource optimization is made more effective.