本文还对相干载波提取中的锁相环提出了一种改进方法。
It also give an improved method for PLL (phase locked loop) to extract coherent carrier.
载波同步是PS K信号相干解调中的一项关键技术，它直接关系到解调的指标。
Carrier synchronization is a key technique in the coherent -demodulation of PSK signals and it is directly related to the specification of demodulation.
在相干光正交频分复用系统中，本文提出了一种新型的基于循环前缀和虚载波的盲频偏估计方法。
A new blind frequency offset estimation method based on cyclic prefix and virtual subcarriers in coherent optical orthogonal frequency division multiplexing (CO-OFDM) system is presented.
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