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Pre-assessment of measurement accuracy is necessary to carry out new type tasks in range experiments. EMBET self-calibration technique can be processed by analyzing and processing the data of the equipment, so as to estimate the parameters of the system error, and provide a reference for the evaluation of the task. For this purpose, an EMBET calibration method based on spline constraint is studied, which derives the model of self-Calibration of multi-station combined ranging and improves the iterative method of parameter estimation. The simulation shows that the method has better estimation accuracy and convergence characteristics.

The Twelfth Five-Year pre-research item calls for multiuser parallel accessing and realizing remote digital communication through field line. Accordingly, it is necessary to deep research the transmission capability of field line in this condition. Thus, adopting some research methods of DSL technology and practical data, some new results are derived by experimental data processing and digital simulation analyzing, which provides new according for technology study and equips research and development.