Vol. 12, no.2, 2020
РусскийEnglish
INFORMATION TECHNOLOGIES
Synchronization Systems Modeling for IEEE 802.11ah Receiver in MATLAB
Fedor B. Serkin, Anton Yu. Dubrovko
Moscow Aviation Institute, https://mai.ru/
Moscow 125993, Russian Federation
E-mail: serkinfb@list.ru, dubrovkoay@mail.ru
Received December 6, 2019, after finalization on Jule 01, 2020, adopted on Jule 06, 2020
Abstract. The problem of applicability of signal processing algorithms that was used in previous Wi-Fi standards to IEEE 802.11ah is discussed. The goal of the work was to study performance of the synchronization algorithms on a low signal to noise ratios. A computer simulation was carried out, that models packet reception in a channel with white noise. Failure probabilities of timing and frequency synchronization systems was measured, as well as bit-error rate. In a model for frequency and timing systems in coarse estimation was used autocorrelation method, in fine estimation – cross-correlation method; for equalizer least-square method was applied; for tracking system two method were explored: classical pilot based and time-frequency decision feedback loop (TF-DFL). As a result, it was confirmed, that TF-DFL method show better results, than classical pilot based one even for traveling pilots. Moreover, in order to approach the theoretical dependence of bit error rate for 10-th modulation coding scheme (MCS10), it is necessary to improve reviewed frequency synchronization and fine timing systems, as well as performance of equalization and tracking methods.
Keywords: IEEE 802.11ah, Wi-Fi HaLow, PHY, MCS10, Low SNR, Synchronization, Failure Probability, RFO Tracking, CFO Tracking, Bit Error Rate
PACS: 84.40.Ua
RENSIT, 2020, 12(2):275-286. DOI: 10.17725/rensit.2020.12.275.
Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/332/12(2)275-286e.pdf