| 摘要: |
| 针对姿态测量的高精度问题和实时性，以及基于载波相位的“北斗”测姿算法中最小二乘模糊度去相关平差(LAMBDA)算法的高复杂运算，选择TI公司高端处理器中的C6678多核数字信号处理器 (DSP)作为单历元单基线“北斗”测姿算法实现平台。根据算法的特点采用数据流模式对DSP多核进行任务分配：DSP的CORE0专门负责与“北斗”接收机UDP(User Datagram Protocol)通信，将“北斗”测姿算法中的各个分部算法分配到另外3个DSP CORE中执行并利用基于消息队列方式的核间通信技术进行数据核间通信。利用OEM617D“北斗”接收机采集的实时“北斗”数据，经过在多核DSP算法处理上运行后，将结果与Matlab仿真结果对比，表明本设计可满足“北斗”测姿的精确性和实时性要求。 |
| 关键词: “北斗”测姿 单历元单基线 多核DSP 用户数据报协议网口传输 Cache技术 |
| DOI：10.3969/j.issn.1001-893x.2017.10.016 |
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| 基金项目:国家自然科学基金资助项目（61301126）;重庆市基础与前沿研究计划项目（cstc2013jcyjA40032）；重庆邮电大学博士启动基金（A2012-33）；重庆邮电大学青年科学研究项目（A2013-31） |
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| Implementation of single-epoch single-baseline Beidou attitude measurement based on TMS320C6678 |
| LI Lingxia,LI Gangping |
| () |
| Abstract: |
| In order to realize high accuracy and real-time of attitude measurement and solve the problem of high complexity of Least-squares Ambiguity Decorrelation Adjustment(LAMBDA) algorithm in Beidou attitude measurement algorithm beased on carrier phase,the C6678 multi-core digital signal processor (DSP) with TI’s high-end processor is chosen as the single-apoch single-line Beidou attitude measurement platform. According to the characteristics of algorithm,the data stream mode is adopted to allocate tasks to multi-core:DSP’s CORE0 is responsible for the User Datagram Protocol (UDP)communication with the Beidou receiver,the various branches of Beidou attitude measurement algorithm are assigned to other three DSP COREs implementation. Running result of the real-time data collected by OEM617D Beidou receiver on the multi-core DSP algorithm is compared with the Matlab simulation result,which shows that the design can meet the real-time and accuracy requirements of the Beidou attitude measurement. |
| Key words: Beidou attitude measurement single-epoch single-baseline multi-core DSP user datagram protocol network port transmission Cache technology |
