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

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.