With differential absorption laser radar as background, the key techniques related in designing real-time monitor and control system based on WDM (Wavelength Division Multiplexing) are studied.

A new time and frequency synchronization method based on frequency domain correlation for an Orthogonal frequency Division Multiplexing (OFDM) system is presented.

Presents a fast parallel DFT processing method to improve the processing speed of the time division multiplexing digital RF memory (DRFM) system.