| Embedded systems widely used in production process control, data collection, aerospace, and so on, these applications is the common characteristics of system requirement to respond rapidly to events, therefore requested to have strong embedded operating system real-time.μC/OS-Ⅱreal time operating system is hard real-time system , time can be strong certainty and has clear real-time constraints.μC/OS-Ⅱreal time operating system obtain standard certification in 2000 by the U.S.A Federal Aviation Authority with RTCA DO178B standard certification, which provesμC/OS-Ⅱhave sufficient stability and security."BeiDou" double star positioning navigation system through two geosynchronous satellite ground equipment and corresponding movements to achieve the objectives of the objects or fixed precision navigation and positioning, and a two-way data communication capacity. Double Star receiver is positioning in communication system positioning communication terminal and its rational design can improve the communication system use efficiency and communication effectiveness and impact on the development of great significance. IntroduceμC/OS-Ⅱreal-time operating system to satellite navigation receivers for improving the stability of receiver, guaranteeing the safety of receiver the, providing tasks process real-time and so on have significant effects.The paper gives an introduction of BeiDou navigation system including system performance, composition, functional and system working principle. Sets up a hardware platform for BeiDou navigation receiver. Propose receiver design overall program and focus on the baseband signal processing. Studies theμC/OS-Ⅱreal time operating system in detail. TransplantsμC/OS-Ⅱto NIOS II embedded processors. Sets up a software platform for BeiDou navigation receiver.According to the requirements of receivers, the system is divided into hardware layer, the operating system layer and layer tasks. Focus on the task of a detailed study and design.Summary the design points of BeiDou Navigation Receiver based onμC/OS-Ⅱreal-time operating system. Propose a method to improve the function of the system.This thesis successfully achieves BeiDou navigation receiver development based on real-time operating systemμC/OS-Ⅱ.Focus on the application of μC/OS-Ⅱto the receiver . Complete the design of system hardware platform and software platform structures. The paper in embedded operating system application research fields, has higher theoretical value and practical value. This paper will inspire the research of BeiDou receiver. |
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