A Novel Method for Non-Stationary CFO Estimation and Tracking in Inter-UAV OFDM Links

被引：5

作者：

Banerjee, Subhankar ^{[1
]}

Giridhar, K. ^{[1
]}

机构：

[1] Indian Inst Technol Madras, Dept Elect Engn, Chennai 600036, Tamil Nadu, India

来源：

2019 IEEE 90TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2019-FALL) | 2019年

关键词：

Inter UAV communication; Carrier frequency offset estimation; Time-varying Doppler estimation;

D O I：

10.1109/vtcfall.2019.8891255

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Drones or UAVs are widely used today for commercial as well as strategic purposes. When a large numbers of drones fly and manueuver together, the OFDM based communication links between drones would see time-varying Doppler. In particular, we study a measurement model where the Doppler variation is significant even within one OFDM block (symbol) duration. We approximately model the time variation of Doppler within one OFDM symbol as well as one whole frame and propose a low complexity timing correlation based algorithm. This approach exploits the repetition of the preamble symbol as well as the self similarity of the Cyclic Prefix(CP) to estimate the Doppler frequency, track the same throughout the frame. The proposed approach provides a far superior bit error rate performance in this time-varying Doppler models when compared to conventional schemes.

引用

页数：5

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