Multi-mode Measurement And Control Base With The Methods Of Research

With the rapid development of space technology, the requirement for the Tracking Telemetry and Command (TT&C) equipment is increasing demands in the ability of multi-targets measurement at same time, anti-interception, anti-destruction, anti-jamming, which has resulted in the gradual application of spread-spectrum technology. At this stage there is coexisting several TT&C Systems including standard TT&C System, coherent and incoherent spread-spectrum TT&C System. How to implement the compatibility of different systems in individual TT&C equipment plays the key role in improving the security of equipment and reducing the research and development costs. The core technology of compatibility between different TT&C Systems is the realization of multi-mode base-band equipment.This thesis systematically describes the implementation methods of multi-mode TT&C base-band equipment based on Software Defined Radio (SDR) structure by analyzing the differences and commonalities in the implemention means of difference TT&C Systems.At the first, the research background, the significance and the domestic and foreign situation of TT&C technology development were introduced. Secondly the key theoretical knowledge of TT&C was expounded. It will analyze the velocity and ranging measurement accuracy under the TT&C System. Nextly the thesis will consentrate on the specific implementation method of related algorithm of TT&C base-band equipment. Furthermore parts of design diagram of key circuit were presented. In addition, the hardware design of multi-mode TT&C base-band equipment and the specific circuit implementation were provided. At last, we discussed the test methods and results of key indicators of multi-mode TT&C base band equipment.The design characters of multi-mode TT&C base band equipment were summarized and introduced the further research work.The result of experimentation shows that the multi-mode TT&C System base band equipment possess good performance and meet the design requirements, which can be used in wide application.