| 基于FPGA的GPS实时伪距测量新方法 |
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| 引用本文： | 李晓翠,胡铁乔,吴仁彪,卢丹,王文益.基于FPGA的GPS实时伪距测量新方法[J].信号处理,2011,27(10):1566-1570. |
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| 作者姓名： | 李晓翠 胡铁乔 吴仁彪 卢丹 王文益 |
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| 作者单位： | 中国民航大学天津市智能信号与图像处理重点实验室 |
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| 基金项目： | 民航局科技基金项目(No.MHRD0606):中国民航大学科研基金项目，国家自然科学基金委员会资助项目，国家自然科学基金委员会与中国民用航空局联合资助项目 |
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| 摘 要： | 同步检测是伪距测量的重要组成部分，本文提出了一种兼顾可靠性和实时性的同步检测方法。该同步检测方法结合前导码比特匹配、奇偶校验，提高检测实时性；通过加强同步状态持续有效条件、利用前导码的周期性，提高检测可靠性。进一步将该同步检测方法与多通道并行C/A码跟踪结合，给出了一种实时伪距测量新方法，并在FPGA上实现了该伪距测量方法。仿真结果证明了本文提出的同步检测方法具有低误检测率、延时短的优点；对基于本文提出的伪距测量方法的GPS实时接收机进行定位测试，测试结果显示硬件接收机能够实现有效定位，表明提出的伪距测量方法能够为定位提供实时、准确、稳定的伪距信息。
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| 关 键 词： | 全球定位系统 伪距 帧同步 码跟踪 现场可编程门阵列 |
| 收稿时间： | 2011-06-02 |
A Novel Method of GPS Real-Time Pseudo Range Measurement Based on FPGA |
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| LI Xiao-cui,HU Tie-qiao,WU Ren-biao,LU Dan,WANG Wen-yi.A Novel Method of GPS Real-Time Pseudo Range Measurement Based on FPGA[J].Signal Processing,2011,27(10):1566-1570. |
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| Authors: | LI Xiao-cui HU Tie-qiao WU Ren-biao LU Dan WANG Wen-yi |
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| Affiliation: | Tianjin Key Laboratory for Advanced Signal Processing, Civil Aviation University of China |
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| Abstract: | The synchronization detection plays an important role in pseudo range measurement. A new synchronization detection method was proposed that the real-time property of detection was improved by combining the string matching with parity check, and the reliability was raised by enhancing the condition of keeping synchronous state. Furthermore, a proposal for real-time pseudo range measurement was given that consisted of the proposed synchronization detection method and multi-channel parallel Coarse Acquisition (C/A) code tracking. The real-time pseudo range measurement was implemented based on Filed Programmable Gate Array (FPGA). The simulations results show that the proposed method of synchronization detection has the advantage of low mistaken detection rate and short delay. Finally the test results show that the Global Position System (GPS) receiver based on the novel proposal for real-time pseudo range measurement can position effectively and they indicate the novel proposal for improved real-time pseudo range measurement can provide precise and real-time pseudo range information for position. |
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