| GPS接收机软件调度方法与性能分析及测试 |
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| 引用本文： | 郭瑶,罗兵,唐康华,何晓峰,罗勇.GPS接收机软件调度方法与性能分析及测试[J].全球定位系统,2011,36(2):9-14. |
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| 作者姓名： | 郭瑶 罗兵 唐康华 何晓峰 罗勇 |
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| 作者单位： | 国防科技大学机电工程与自动化学院,湖南,长沙,410073 |
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| 摘 要： | 基于Altera公司的现场可编程门陈列（FPGA）实现了GPS的L1频点基带相关处理，多任务操作系统（eCos）实现了软件各个功能模块的调度。本文设计了两种线程执行时间开销测试方法，并进行了相互验证。分析了基于多任务与单任务操作系统情况下各自的软件调度模型及不同调度模型对CPU利用效率以及输出更新率的影响。实测数据表明：当伪距输出频率为10Hz，定位解算输出频率为5HZ，可见卫星为5颗的情况下，相对于单任务操作系统的接收机，设计实现的基于多任务操作系统的接收机处理效率提高了约1．2倍。
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| 关 键 词： | GPS接收机软件 多任务调度 eCos操作系统 性能分析 |
Multi-task Scheduling Method for GPS Receiver Software and its Performance Analysis and Test |
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| GUO Yao,LUO Bing,TANG Kang-hua,HE Xiao-feng,LUO Yong.Multi-task Scheduling Method for GPS Receiver Software and its Performance Analysis and Test[J].Gnss World of China,2011,36(2):9-14. |
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| Authors: | GUO Yao LUO Bing TANG Kang-hua HE Xiao-feng LUO Yong |
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| Institution: | GUO Yao,LUO Bing,TANG Kang-hua,HE Xiao-feng,LUO Yong(College of Mechatronics Engineering and Automation,National University of Defense Technology,Changsha Hunan 410073,China) |
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| Abstract: | In the paper,the GPS L1 baseband correlation was implemented on the platform of Altera FPGA,and software schedule of the function modules was implemented based on eCos multi-task operating system.Two kinds of test method of task execution time were proposed and validated by each other's result.Software scheduling model based on single-task system and multi-task system were analyzed separately and compared.Base on that,the two models' effect on CPU efficiency and output rate was studied.The test results of r... |
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| Keywords: | GPS Receiver multi-task scheduling eCos performance analysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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