Secure and Reliable Multidimensional Orthogonal Code aided RF Watermark Design for NB-IoT Systems

Document Type

Article

Publication Date

6-1-2020

Identifier/URL

41082095 (Pure)

Find this in a Library

Catalog Record

Abstract

Narrow band Internet of Things (NB-IoT) systems support massive devices to connect with the wide area network with the low energy consumption. However, due to the broadcasting property and variant conditions of wireless channels, both the security and the reliability performances are required to be improved for NB-IoT terminals. In this paper, we propose a multidimensional orthogonal code (MOC) aided radio frequency (RF) watermark scheme to enhance both the security and the reliability performances. In our design, we exploit the repeat transmission mechanism in NB-IoT systems, and propose to use the repeated signal as the host signal to carry multiple low-power watermark signals, wherein different orthogonal codewords are utilized as the embedding coefficients to hide the host signals. Thanks to the orthogonality of MOC watermarks, the mutual interferences among the transmitted signals can be effectively suppressed, thus the reliability performances could be improved. Furthermore, we derive the theoretical bit error rate (BER) and analyze the efficiency as well as the covertness. Simulation results validate the theoretical analysis. Moreover the results demonstrate that using the proposed MOC aided RF watermark design, NB-IoT systems can achieve better reliability and covertness performances as well as higher security performances than counterpart schemes.

DOI

10.1109/ICC40277.2020.9148719

Link to Full Text

Catalog Record

Share

COinS