Evaluation of quasi-zenith satellite system L5S signal

Chiu Mei Wu, Shau Shiun Jan, Takeyasu Sakai

研究成果: Paper

摘要

The modernized global navigation satellite system (GNSS), with its improved signal structure and frequency diversity, is now developed and has been recognized throughout the world in the last decade. In addition, the satellite based augmentation system (SBAS) is one of the GNSS augmentation systems that improves accuracy and integrity in the field of aviation. Conventional SBAS uses a single constellation GNSS (GPS) single frequency (L1 band) signal to augment satellite positioning systems. To improve the position accuracy as well as to enhance integrity, the next-generation SBAS, called DFMC (dual-frequency multi-constellation) SBAS, augments positioning systems using both L1 and L5 band signals. Furthermore, there are many GNSS augmentation systems under development, such as the quasi-zenith satellite system (QZSS). The first QZSS satellite, called “Michibiki” was launched in 2010 and has been continuously broadcasting ranging signals and augmentation signals. Moreover, the new QZSS satellites launched in the summer of 2017 can transmit the L5S signal, which is identical to the L5 SBAS signal. Thus, the objective of this research is to develop a piece of equipment to assess the real augmentation performance of the QZSS L5S experimental signal in the Asia Pacific region. We develop a piece of prototype equipment using software defined radio (SDR) technology for QZSS L5S signal reception to assess all the necessary signal processing techniques. The proposed SDR consists of a GNSS antenna, a Universal Software Radio Peripheral (USRP) platform, and a personal computer. The SDR implements all receiver chains, including the digital signal processing, performing signal acquisition and tracking of the available satellite signals, and decoding the navigation message and computing the observables needed by the positioning algorithm. To evaluate the performance of the QZSS L5S SDR, the acquired QZSS satellite is marked, and the value of acquired Correlation Peak to next Peak Ratio (CPPR) is calculated in the signal acquisition process, Finally, we apply several signal quality analysis (SQA) methods to analyze the L5S signal continuity and signal strength for various times. Moreover, the actual GPS and QZSS satellite data, signals, and measurements are analyzed for comparison.

原文English
頁面339-352
頁數14
出版狀態Published - 2018 一月 1
事件2018 International Technical Meeting of The Institute of Navigation, ITM 2018 - Reston, United States
持續時間: 2018 一月 292018 二月 1

Other

Other2018 International Technical Meeting of The Institute of Navigation, ITM 2018
國家United States
城市Reston
期間18-01-2918-02-01

    指紋

All Science Journal Classification (ASJC) codes

  • Transportation
  • Computer Science Applications
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Ocean Engineering

引用此

Wu, C. M., Jan, S. S., & Sakai, T. (2018). Evaluation of quasi-zenith satellite system L5S signal. 339-352. 論文發表於 2018 International Technical Meeting of The Institute of Navigation, ITM 2018, Reston, United States.