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Speech signal can be effect by the external interruption in the process of flight simulation, which results in the deteriorated speech processing performance in flight simulation system. To solve the problem, speech enhancement module has been developed using the spectral subtraction algorithm based on the flight simulation system developed by the research team. The module will improve the recognition rates and provide advanced anti-jam capabilities for the speech processing performance of the flight simulation system. The feasibility and validity of this speech enhancement module is validated by processing the interrupted speech signal. The work in this paper has laid foundation for the application of the speech enhancement technology in flight simulation system.

The development of science and technology promotes the development of industrial and the change of idea and thoughts. Combined with the computer technology and information technology development, a lot of scientific technologies achieved huge improvement. In this context, simulation technology has also made a comprehensive and in-depth development, especially in the design and application of the all-digital flight simulation platform. The building of all-digital flight simulation platform has greatly helped pilots' flying in the complex environment, which has important significance to reducing the flight costs, enhancing the pilot combat techniques, etc. In particular, the development and utilization of the UAV will greatly promote the combat capability of the Air Force, and has great significance to enhance the country's military level.