Dynamic estimation of virtual channel model for distributed video coding

To realize multiuser diversity in slow fading correlated channels,We adopt random beamforming technique and propose to construct random beamforming matrix exploiting virtual channel representation.

By scheduling virtual channels, AOS generates a single data flow to transfer data which includes science data、audio、video、p icture、telemetry and telecommand.

Emulate teaching based on virtual model of problem——A discussion of teaching method for principles & peripheral technology of micro-computer;

For the key question of the virtual model replace solid model,this paper discusses method of measurement of virtual model based on VRML and key technology for realization.

Exploration of mechanical drawing teaching dummy model bank

On constructing web based dummy model bank by applying vrml technology

By analyzing defects of traditional material object models and advantages of setting up dummy models,the author puts forward that it is necessary to establish and apply dummy test bank to assist teaching of Machinery Drawing based on the three-dimensional CAD software.

Key Techniques of Channel Simulation System for Intermediate Frequency;

As atmospheric noise being one of the main factors influencing HF channel characteristics, the method of generating atmospheric noise in line with real channel plays an important role in the research of wide-band HF channel simulation system.

Multi-path delay is an important index of technology research on channel simulation,the paper introduces an processing algorithm based on interpolation and extraction to realize high-precision time-delay.