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201003
- 89c51单片机控制西门子TC GSM模块收发短信。注意晶振频率为11.0592M。-89c51 SCM control Siemens TC GSM module send and receive text messages. Note that oscillator frequency 11.0592M. .
system
- GPS与北斗双模授时的压控晶振校频系统设计-GPS and Compass mode voltage-controlled crystal oscillator timing and frequency calibration system
jtcurran_oscpll_taes2012
- Digital GNSS PLL Design Conditioned on Thermal and Oscillator Phase Noise
Code_NCO.zip
- 码数控振荡器相位累加器的位数N为32,利用verilog HDL语言在Quartus II 9.1中具体实现了载波和码NCO的设计。,The code numerically controlled oscillator phase accumulator bits N 32 verilog HDL language in the concrete realization of the design of the carrier and code NCO Quartus II 9.1.
GPS
- 在有限的实验条件下,为验证高动态软件GPS接收机信号的捕获和跟踪模型,提出了一种基于软件GPS 接收平台的高动态GPS数字中频信号模拟方法。介绍了软件GPS接收平台的基本结构框架,并根据高动态环境 下伪随机码的多普勒效应及本地振荡器的频率误差对接收信号的影响,推导并建立了一种较精确的高动态GPS 数字中频信号模型。为使模型适用于更加复杂的环境,通过设置接收信号的噪声幅值来调整信噪比大小,以确 定所需的信号强度;在信号参数的设置过程中调整入射信号与反射信号的幅度比值及反射信号的时间
stm32f0_gpsdo
- this is GPS disciplined oscillator source code, based on 1PPS GPS signal and NMEA protocol