Study on Modulation Recognition of Communication Signal Based on Phase Diagram;

The application of PWM in digital modulation and demodulation for analog communication signals in several modulation modes;

This paper describes the research contexts,current recognition algorithms and development prospects of modulation recognition technology for communication signals,and also gives some suggestions for the future development.

Demodulation techniques on digital communication signals, such as MASK, MFSK and MPSK signals, is discussed in this paper.

The status of China railway transport equipment has been further improved in year 2001 with line structure being optimized, railway network density being increased, equipment level being improved, signaling and communication equipment being enhanced.

A class of general multiple mobile robots formation control system of achieving coordination through communication channel was described.

In terms of characters of artificial neural networks and signal transmitting and processing, a point of view on communication channel based on physical neural networks was presented.

The performance is investigated between standard DVB-T and improved DVB-T with different parameters of decoding algorithms,interleavers,communication channels through simulation.