上海交通大学学报(英文版) ›› 2011, Vol. 16 ›› Issue (6): 728-733.doi: 10.1007/s12204-011-1217-1

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Micro-Electro-Mechanical-Sensor Inertial Navigation    System-Assisted Global Navigation Satellite System     Receiver  Acquisition Scheme and Performance
Evaluation

YE Ping (叶   萍),     ZHAN Xing-qun  (战兴群),    ZHANG Yan-hua   (张炎华)   

  1. (School of Aeronautics and Astronautics, Shanghai
    Jiaotong University, Shanghai 200240, China)
  • 收稿日期:2011-02-07 出版日期:2011-12-30 发布日期:2012-01-12
  • 通讯作者: YE Ping (叶 萍) E-mail:yeping715@yahoo.com.cn

Micro-Electro-Mechanical-Sensor Inertial Navigation    System-Assisted Global Navigation Satellite System     Receiver  Acquisition Scheme and Performance
Evaluation

YE Ping (叶   萍),     ZHAN Xing-qun  (战兴群),    ZHANG Yan-hua   (张炎华)   

  1. (School of Aeronautics and Astronautics, Shanghai
    Jiaotong University, Shanghai 200240, China)
  • Received:2011-02-07 Online:2011-12-30 Published:2012-01-12
  • Contact: YE Ping (叶 萍) E-mail:yeping715@yahoo.com.cn

摘要: When an aircraft moves under a low
carrier-to-noise ratio (CNR) or at a high speed, increasing the
sensitivity of global navigation satellite system (GNSS) receiver is
a goal quite hard to achieve. A novel acquisition scheme assisted
with micro-electro-mechanical-sensor (MEMS) inertial navigation
system (INS) is presented to estimate the Doppler caused by user
dynamics relative to each satellite ahead of time. Based on tightly
coupled GNSS/INS estimation algorithm, MEMS INS Doppler error that
can be achieved is first described. Then, by analyzing the mean
acquisition time and signal detection probability, the MEMS
INS-assisted acquisition capabilities in cold, warm and hot starts
are quantitatively determined and compared with the standard GNSS
acquisition capability. The simulations and comparisons have shown
that: the acquisition time in cold start can be shortened by at
least 23 s, the time in warm start can be shortened to 1 s and the
acquisition capability is improved 95%, and the reacquisition
time in hot start can be shortened by around 0.090 s and the
capability can be enhanced 40%. The results demonstrate the
validity of the novel method.

关键词: global navigation satellite system (GNSS),
micro-electro-mechanical-sensor (MEMS),
inertial navigation system
(INS),
cold start, warm start, hot start

Abstract: When an aircraft moves under a low
carrier-to-noise ratio (CNR) or at a high speed, increasing the
sensitivity of global navigation satellite system (GNSS) receiver is
a goal quite hard to achieve. A novel acquisition scheme assisted
with micro-electro-mechanical-sensor (MEMS) inertial navigation
system (INS) is presented to estimate the Doppler caused by user
dynamics relative to each satellite ahead of time. Based on tightly
coupled GNSS/INS estimation algorithm, MEMS INS Doppler error that
can be achieved is first described. Then, by analyzing the mean
acquisition time and signal detection probability, the MEMS
INS-assisted acquisition capabilities in cold, warm and hot starts
are quantitatively determined and compared with the standard GNSS
acquisition capability. The simulations and comparisons have shown
that: the acquisition time in cold start can be shortened by at
least 23 s, the time in warm start can be shortened to 1 s and the
acquisition capability is improved 95%, and the reacquisition
time in hot start can be shortened by around 0.090 s and the
capability can be enhanced 40%. The results demonstrate the
validity of the novel method.

Key words: global navigation satellite system (GNSS),
micro-electro-mechanical-sensor (MEMS),
inertial navigation system
(INS),
cold start, warm start, hot start

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