该GPS信号模拟器结构简单，成本低，生成的GPS信号精度高，可以满足部分GPS接收机的测试需求。
The GPS simulator is simple and low cost. The generated signal is accuracy enough to meet the test of most GPS receiver.
文章将重点放在了ASK中频信号发生器和接收机的FPGA设计及实现，给出了详细的设计方案和功能测试结果。
The paper focuses on the design and implementation of FPGA based ASK if transceiver and detailed design and functional verification are described.
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