This paper analyses the performance of hybrid DS/SFH spread spectrum signal based on chaotic sequences and MSK modulation in the presence of partial band multitone jamming and Additive White Gaussian noise.

This paper analysed and studied the performance of overlapping incoherent hybrid DS SFH spread spectrum communication systems in the presence of multitone jamming, and educed the multitone jamming effect on the performance of an overlapping asynchronous hybrid DS SFH spread spectrum communication systems.

Application of the variable step-size fast adaptive algorithm to suppress narrowband interference in DSSS system;

Elimination of high frequency interference during the laser-arc hybrid welding;

Anaysis of high frequency interference in arc welding inverter and control measures;

This paper enters into some technical problems about anti disturbance wire arrangement in computer controlled AC automatic TIG welding system in high frequency interference environment.

The paper investigates the factors affecting high-frequency interference,of which include the high-frequency interference,the length of welding cable and power line,the output resistance of signal source,the type,length and orientation of signal line,the shielding and grounding of high-frequency oscillator,power line and signal line.

In view of the poor high-frequency interference rejection of the original second-order lead correction control strategy,an improved strategy is proposed,which reduces amplitude gain at high frequency without changing phase-frequency characteristic and smooth the phase-frequency characteristic in a broader rage.