基于SOPC实现扩频信号捕获与跟踪

SOPC-based Implementation of Spread Spectrum Signal Acquisition and Tracking

本文提出利用FPGA内的嵌入式软核NiosII代替专用DSP处理器和通用控制器，在单片FPGA内实现扩频信号的捕获与跟踪。由于NiosII和外部接口随用户自己配置，使得这种模式重构性好，且避免了PCB板复杂的布线，大大降低了硬件的复杂度。本文详细阐述了这种方法的总体设计方案和详细软硬件的实现过程，最后给出了实时GPS信号捕获跟踪的结果。

This paper make use of FPGA embedded within the soft-core processors instead of special DSP processor and common controller. In a single FPGA to achieve spread spectrum signal acquisition and tracking.And external interfaces with the user＇s own configuration,making the reconstruction of this model is good,and the PCB board to avoid the complex wiring and greatly reduce the hardware complexity.This paper describes the overall design of this method and the detailed hardware and software implementation process,given the real-time GPS signal acquisition and tracking results.