We propose a new kind of encoding for the genetic algorithms, called two layer encoding, which comes from the genetics mechanism in molecular genetics.

A new method for prestack depth migration of areal shot records with phase encoding;

A new OCDM technology of QPSK coherent phase encoding in time domain;

In this paper, an encoding method is proposed for improving the resolution of rotary encoder-phase encoding method.

In order to further improve the precision and efficiency of prestack depth algorithm, the paper introduced a relief surface-based prestack depth migration algorithm of synthetic shot records, in which the basic idea is to use phase coding method to produce synthetic shot records, realizing prestack depth migration of mu.

Phase coding patterns of MPSK (multiple phase shift keying) are recogniged based on the phase mutation values which are determined by computing the error energy of adjacent code elements in MPSK.

A new quantum key distribution scheme is proposed to realize both phase coding and time coding based on two unbalanced Mach-Zehnder interferometers.

The signal characteristics of Phase coded radar, including spectral expansion, pulse compression, low peak power, distance Dopple coupling and Doppler sensitivity etc.

Radar waveforms that can using pulse compression technology are linear frequency modulation,nonlinear frequency modulation,phase coded pulse.