Spin effects of GPS signals on a multi-antenna mounted vehicle

Im, Hun Cheol; Choi, Yun Sub; Lee, Sang Jeong

doi:10.1109/plans.2016.7479715

Cited by 2 publications

(2 citation statements)

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“…In recent years, research on using GPS signals in a rotating vehicle have been carried out steadily. In particular, studies have been conducted to estimate the roll angle and integrate it with the navigation system of a rotating vehicle such as an artillery shell which moves with predictable trajectory [2,3,4,5,6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Choi et al [7] proposed a rotation locked loop (RLL) algorithm to estimate the roll angle and performed detailed analysis of that algorithm under various conditions which do not include weak signal environments. Im et al [8,9] proposed an algorithm for estimating the roll angle using the RLL algorithm in a multi-antenna mounted vehicle and compensating the carrier tracking loop using the carrier frequency obtained in the roll angle estimation algorithm. However, because these methods did not consider the situation where the strength of the satellite signal measured at the receiver becomes low, their performances degrade or they do not even work at weak signal environments.…”

Section: Introductionmentioning

confidence: 99%

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

Lim

Lee

2018

Sensors

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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.

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