P PM无线光通信的关键问题之一在于时隙时钟与帧同步信号的恢复。

One of the most critical points in optical PPM radio communication lies on the recovery of slot clock and frame synchronization signal.

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卫星云图的帧周期变化，数据是突发性的。为了提取帧同步信号，研制出“定位孔径技术”，可靠地提取帧同步信号。

The frame period of satellite image changes suddenly, a positioning aperture technique is implemented to reliably acquire the frame period.

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为了从接收到的PCM码中还原出原始信号，阐述了一种由硬件实现帧同步，由串并转换器完成PCM码解调器的高速PCM码解调器电路。

This paper presents a high speed PCM demodulation circuit through which the serial parallel converter plays a role of demodulating and the hardware realizes frame synchronization.

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