GPS P码捕获处理器中信号传递的策略与实现

The Strategy and Implementation of Signal Transferring in Global Positioning System P-Code Acquisition

GPS P码捕获处理器是异步多时钟系统,在创建基于FPGA的捕获处理器时,必须考虑控制信号和数据如何在多个时域内传递.为了准确传递控制信号和数据信号,本文提出对一路控制信号使用握手信号的传递方式,多路控制信号只传送一路控制信号的传递方式.传送数据时使用握手信号以及创建缓存的方式.对每一种传递方式都进行了仿真,仿真结果表明所采用的传递策略能够使信号准确传递.

The global positioning system P-code acquisition is an asynchronous multi-clock system. The most important thing to consider is how to transfer the control signal and the data signal between clocks when building this system on FPGA. In order to transfer control signal and data signal correctly, it is best to use handshaking signal to transfer single control signal and to transfer only one control signal when needing to transfer multiple control signals. This paper also suggests to use handshaking signal or to create a buffer memory to transfer data signal. At last, all methods are simulated. As the result illustrates that the control signal and data signal are correctly transferred.