Implementation and performance evaluation of cellular NB-IoT OTDOA positioning
| Autor: | Stefan Lippuner, Qiuting Huang, Mauro Salomon, Matthias Korb |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Computer science
Orthogonal frequency-division multiplexing business.industry 010401 analytical chemistry OTDOA 020206 networking & telecommunications 02 engineering and technology 01 natural sciences 0104 chemical sciences Extended coverage GNSS applications 0202 electrical engineering electronic engineering information engineering Redundancy (engineering) Hardware acceleration Use case System on a chip business Computer hardware |
| Zdroj: | PLANS |
| Popis: | This contribution describes the first implementation of an integrated modem supporting NB-IoT OTDOA positioning. The integration of a dedicated hardware accelerator provides the necessary processing power for time-domain cross-correlations of OFDM signals and enables successful position fixes at highly negative SINR. The presented HW/SW partitioning scheme allows to minimize the HW overhead, keeping it below 2% of the System on Chip (SoC)'s area, while allowing for flexible algorithms taking advantage of the integrated processor system. Measurements with fabricated silicon in a laboratory environment prove that 3GPP accuracy requirements are easily met. The achieved Root Mean Square (RMS) positioning accuracy of 48.5 m and 65.5 m in normal and extended coverage, respectively, shows the potential of NB-IoT positioning as a complement to GNSS. Potential use cases are indoor applications and the improvement of cyber-physical systems' security by adding redundancy to their positioning capabilities. |
| Databáze: | OpenAIRE |
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