第四章详细叙述了卫星接收机NIM模块和USB接口的设计细节。
Chapter four narrated the design detail in NIM module and USB interface of satellite receiver in detail.
系统包括GPS接收机、GPS中频数据采集器、DSP网络通信配器及计算机四部分。
The system includes four parts: GPS receiver, GPS IF data acquisition equipment, DSP network communication adapter and computer.
使用二个双曲线(三个接收机)系统能获得2d目标位置，当使用最少三个双曲面(四个接收机)系统能实现完整的3d立体目标定位。
Using two hyperbolas (three receivers) the system can obtain 2d target position, while using at minimum three hyperboloids (four receivers) the system can achieve full 3d target locating.
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