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Wavelet and Neural Network-Based Multipath Detection for Precise Positioning Systems

Author

Listed:
  • O-Jong Kim

    (Department of Aerospace Engineering, Sejong University, Seoul 05006, Republic of Korea)

  • Changdon Kee

    (Department of Aerospace Engineering, Institute of Advanced Machines and Design, Seoul National University, Seoul 08826, Republic of Korea)

Abstract

Multipath errors are significantly challenging in radio navigation systems. In particular, multipath errors in indoor environments cause significant errors in the position domain because not only the building materials that surround the environment but also all objects inside the building can reflect the navigation signals. Multipath errors in outdoor environments, such as in global navigation satellite system (GNSS) signal applications, have been widely studied for precise positioning. However, multipath studies for indoor applications have rarely been conducted because of the complicated environment and the many objects made of various materials in small areas. In this study, multipath mitigation methods using a shallow neural network and a transfer learning-based deep neural network were respectively considered to overcome the complexity caused by the reflected signals in indoor environments. These methods classify each measurement according to whether the measurement exhibits a severe multipath error. Carrier-phase measurements broadcasted from the transmitter were used for the wavelet transform, and the magnitude values after the transform were used for neural network-based learning. Shallow and deep networks attain approximately 87.1% and 85.6% detection accuracies, respectively, and the positioning error can be reduced by 10.4% and 9.4%, respectively, after multipath mitigation.

Suggested Citation

  • O-Jong Kim & Changdon Kee, 2023. "Wavelet and Neural Network-Based Multipath Detection for Precise Positioning Systems," Mathematics, MDPI, vol. 11(6), pages 1-22, March.
    • Handle: RePEc:gam:jmathe:v:11:y:2023:i:6:p:1400-:d:1096600
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    References listed on IDEAS

    as
    1. Asif Khan & Jun-Sik Kim & Heung Soo Kim, 2021. "Damage Detection and Isolation from Limited Experimental Data Using Simple Simulations and Knowledge Transfer," Mathematics, MDPI, vol. 10(1), pages 1-26, December.
    2. Edoardo Savini & Cornelia Caragea, 2022. "Intermediate-Task Transfer Learning with BERT for Sarcasm Detection," Mathematics, MDPI, vol. 10(5), pages 1-14, March.
    3. Asif Khan & Hyunho Hwang & Heung Soo Kim, 2021. "Synthetic Data Augmentation and Deep Learning for the Fault Diagnosis of Rotating Machines," Mathematics, MDPI, vol. 9(18), pages 1-26, September.
    4. Yongjun Lee & Byungwoon Park, 2022. "Nonlinear Regression-Based GNSS Multipath Modelling in Deep Urban Area," Mathematics, MDPI, vol. 10(3), pages 1-15, January.
    Full references (including those not matched with items on IDEAS)

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