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Design of Enhanced Rotation Locked Loop for Roll Angle Estimation of Rotating Vehicle in a Weak GPS Signal Environment

机译:弱GPS信号环境中旋转车辆辊角估计增强旋转锁环的设计

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摘要

In order to estimate the roll angle of a rotating vehicle, an enhanced rotation locked loop (RLL) algorithm is proposed in this paper. The RLL algorithm estimates the roll angle by using the property that the power of the GPS signal measured at the receiver of a rotating vehicle changes periodically. However, in case the received GPS power is decreased, the performance of the conventional RLL algorithm degrades, or it cannot estimate the roll angle anymore, therefore, for operating the RLL algorithm in a weak signal environment, this paper designs a method to increase the signal-to-noise ratio (SNR) by overlapping multiple GPS signals’ correlator outputs and a method to compensate the decreased response of a rotation discriminator at low-signal strength. Through computer simulations, the performance of the proposed algorithm is verified and it is shown that the roll angle can be estimated stably even at a weak signal environment down to 29 dB–Hz of C/N0.
机译:为了估计旋转车辆的辊角,本文提出了增强的旋转锁定环(RLL)算法。 RLL算法通过使用在周期性地改变在旋转车辆的接收器处测量的GPS信号的功率来估计滚动角度。然而,如果接收到的GPS电力降低,则传统RLL算法的性能降低,或者它不能再估计滚动角,因此,为了在弱信号环境中操作RLL算法,本文设计了一种增加的方法通过重叠多个GPS信号的相关器输出和方法来补偿旋转判别器的低信号强度的降低响应噪声比(SNR)。通过计算机仿真,验证了所提出的算法的性能,结果表明,即使在低至29dB-Hz的C / N0的弱信号环境下也可以稳定地估计辊角。

著录项

  • 作者

    Hun Im; Deok Lim; Sang Lee;

  • 作者单位
  • 年度 2018
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
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