The GPS acquisition method based on Nios Ⅱ soft core

TIAN Jia; WANG Wei; SHI Ping-yan

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The GPS acquisition method based on Nios Ⅱ soft core

更新时间：2026-09-04

- The GPS acquisition method based on Nios Ⅱ soft core
- Vol. 36, Issue 11, Pages: 7-10(2019)
- 作者机构：
  
  中国空间技术研究院机构西安分院,陕西,西安,710100
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2019
- 稿件说明：
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田嘉, 王伟, 史平彦. 一种Nios Ⅱ软核架构的高效GPS捕获方法[J]. 微电子学与计算机, 2019, 36(11): 7-10.

TIAN Jia, WANG Wei, SHI Ping-yan. The GPS acquisition method based on Nios Ⅱ soft core[J]. 2019, 36(11): 7-10.
田嘉, 王伟, 史平彦. 一种Nios Ⅱ软核架构的高效GPS捕获方法[J]. 微电子学与计算机, 2019, 36(11): 7-10. DOI：

TIAN Jia, WANG Wei, SHI Ping-yan. The GPS acquisition method based on Nios Ⅱ soft core[J]. 2019, 36(11): 7-10. DOI：

摘要

针对传统GPS接收机不能根据接收信号的特性自适应的调节频率搜索范围及积分时间的问题

本文提出了一种Nios Ⅱ软核架构的高效GPS捕获方法

其可以通过Nios Ⅱ软核自适应调节频率搜索范围、相干积分时间及非相干积分时间

流水线式的VHDL结构仅负责并行处理

实现了参数调节的灵活可控.通过采用仅有一片Stratix Ⅲ FPGA的基带开发板

实测结果表明

捕获功能性能正常

频率捕获范围可在100 Hz~80 kHz内灵活切换

积分时间可在1 ms~30 s内灵活切换.

Abstract

In order to solve the problem that the traditional GPS receiver cannot adjust the frequency search space and integration time adaptively according to the characteristics of the received signal

the GPS acquisition method based on Nios Ⅱ soft core is presented by this paper. The Nios Ⅱ soft core is responsible for accommodate the frequency search space

the coherent integration time and the non-integration time. The VHDL part of assembly line structure is responsible for the parallel data processing. Therefore

the parameters can be adjusted adaptively by the method. By using the conception product which embeds 1 Stratix Ⅲ chip

real test result shows that the acquisition works well

the frequency search space can be changed within 100 Hz-80 kHz and the integration time can be changed within 1ms-30s.

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references

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TIAN J, WANG W, WANG D, et al. GPS CA code cross correlation mitigation technique for HEO orbit acquisition[C]//66th International Astronautical Congress 2015. Jerusalem, Israel, 2015: 54-62.

TIAN J, WANG W, WANG D, et al. Whole MTO orbit acquisition method based on FPGA resource restricted platform[C]//66th International Astronautical Congress 2015. Jerusalem, Israel, 2015: 33-41.

TIAN J, WANG Y, WANG W, et al. Cross-Band aided acquisition on HEO Orbit[C]//65th International Astronautical Congress 2014. Toronto, Canada, 2014: 121-130.

New York City KAPLAN E D, HEGARTY C J. Understanding GPS: principles and applications[M]. New York City, Artech House, 2006.

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CAPUANO V, BOTTERON C, WANG Y, et al. GNSS/INS/Star tracker integrated navigation system for earth-moon transfer orbit[C]//proc. of the ION GNSS+, 2014.Tampa, Florida, USA, 2014: 162-170.

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