Indoor Simultaneous TOA Estimation of Multiple Users Using Leaky Coaxial Cable

Zhu, Junjie; Kouda, Erika; Hou, Pengcheng; Nagayama, Kenta; Hou, Yafei; Denno, Satoshi

doi:10.1109/lifetech53646.2022.9754835

Cited by 3 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The authors of [14] proposed a joint estimation scheme based on the two-dimensional multiple signal classification (MUSIC) algorithm to reduce array modelling errors in estimating DOA and ToA for fifth generation (5G) signals. The authors of [15] presented a method for estimating multiple users simultaneously using a leaky coaxial cable based on ToA. In [16], a technique utilizing phase-mode expansions and near frequency-invariant elliptical arrays was proposed for estimating joint DoA and ToA in multipath environments using ultra-wideband signals.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Random Access Reception Algorithm for ToA Estimation in NB-IoT

Li¹,

Xiang

Ding

et al. 2023

Electronics

View full text Add to dashboard Cite

Narrowband Internet of Things (NB-IoT) aims to provide wide coverage for a massive number of low-cost devices. Therefore, an NB-IoT physical random access channel (NPRACH) preamble based on a single tone signal with frequency hopping was designed, enabling the base station to estimate the time-of-arrival (ToA) values for realizing uplink synchronization among multiple users. However, due to residual carrier frequency offset (RCFO) in the NPRACH preamble, it is crucial to keep the accuracy of the ToA estimation. Recognizing this urgency, in this paper we first judiciously investigate the effect of the hooping distance on ToA estimation. With which, we propose an efficient receiving algorithm to improve the accuracy of ToA estimation. The main aim of the algorithm is to treat two consecutive symbol groups as a whole and then carry out difference calculations on the two newly constituted symbol groups to construct a more logical frequency hopping distance. Extensive numerical results validate the superiorly of our proposed scheme compared against conventional strategies, showing that the probability of the ToA estimation obtained by this method is 99% within the acceptable error range.

show abstract

Section: Introductionmentioning

confidence: 99%