In this paper, a spread - spectrum based chaotic parameter modulation is proposed, the performance is analyzed, the role of suppressing noise of threshold process in different channels with different SNR is studied.

An observer-based parameter modulation and demodulation Henon system was chosen to be a typical example.

In this paper, a way of chaos secret communication based on parameter modulation is proposed.

The simulation results show that the algorithm can recognize the signals automatically and estimate modulation parameter with high precision at .

Chaotic multiple parameter modulation based on self-synchronization;

The digital modulation quality parameters are very important technical index in digital communication system,which can indicate the figure-of-merit of digital signal modulation and assure the system running in good condition.

Effects of pulsing parameters on weld shape parameters during pulsed Nd-YAG laser welding of aluminum alloys;

Performance comparison of the M-ary digital communication systems based on chaotic parameter modulation;

Chaotic hiding, chaotic parameter modulation, chaotic shift keying and chaotic spread spectrum sequence are discussed in detail.

It also analyzes the theory and property of chaos masking technology,chaotic parameter modulation technology,chaos shift keying technology and chaotic spread spectrum techology.