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采用低中频架构设计了一种0.18μm CMOS工艺的GPS/BDS双模可重构接收机射频前端，能在GPS L1模式或BDS B1模式下工作。通过频率自适应电路调整中频滤波器的时间常数,降低其频率不确定度；压控振荡器中加入4位开关电容阵列，以提高频率调谐范围和相位噪声性能；通过硬件复用的方式降低系统功耗。测试结果表明，在1.8 V电源电压下，功耗37.8 mW，电压增益为103 dB，GPS L1和B...
open-source software-operated cmos camera for real-time mapping
Automation Calibration CMOS Close Range Mobile Mapping Real-Time
2015/9/1
Accurate time registration, georeferencing, and instantaneous feature extraction are important challenges for real-time mapping systems. The Geodetic Engineering Laboratory (TOPO) at the EPFL has desi...