一阶锁相环 meaning in English

first order phase locked loop
first order pll
first-order phase-locked loop

First - order phase - locked loop
一阶锁相环
In case where long - range communication is needed , spatial diversity blind equalizer ( sdbe ) is an effective way to improve snr and suppress distortion . joint carrier phase recovery with sdbe using second order digital phase lock loop is presented to track the doppler shift , and a kind of quantization method is used to reduce the complexity of the multi - channel algorithm . its performance is very similar to the original one
仿真结果表明，采用二阶数字锁相环的空间分集均衡算法的跟踪性能超过了采用一阶锁相环和未加锁相环的算法，可有效补偿由于水声信道时变而引入的载波相位快速变化；采用误差量化的算法和原算法的收敛和踉踪性能都很接近。