Impact of imperfect angle estimation on spatial and directional modulation

Zhang, Hongyan, Xiao, Yue, Xiao, Yanping, and Xiang, Wei (2020) Impact of imperfect angle estimation on spatial and directional modulation. IEEE Access, 8. pp. 7081-7092.

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Abstract

In this paper, we investigate the impact of imperfect angle estimation (IAE) on spatial and directional modulation (SDM) systems, assuming that the signal experiences line of sight (LoS) propagation. In SDM systems with IAE, the variation is analyzed in detail, when there is a mismatch between the beamforming and precise channel matrices. Based on the union bound and statistics theory, the average bit error probabilities (ABEPs) for both the legitimate user and eavesdropper are derived. In addition, the ergodic rate is also quantified with IAE. Simulation results are presented to show that the achieved theoretical ABEPs are useful in quantifying the potential performance penalty. We also show that the mismatch between the beamforming and precise channel matrices will become greater with the increase in direction measurement error (DME), which affects the detection for both the legitimate user and eavesdropper. On the other hand, due to the effect of IAE, the SDM requires more signal-to-noise ratio (SNR) gain to achieve a stable ergodic secrecy rate.

Item ID: 63021
Item Type: Article (Research - C1)
ISSN: 2169-3536
Keywords: Spatial and directional modulation, imperfect angle estimation, bit error rate, ergodic secrecy rate
Copyright Information: This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see http://creativecommons.org/licenses/by/4.0/
Funders: National Science Foundation of China (NSFC), Fundamental Research Funds for the Central Universities (FRFCU), Sichuan Science and Technology Program (SSTP)
Projects and Grants: NSFC grant no. 61671131, FRFCU grant no. ZYGX2018J092, SSTP grant no. 2018HH0138
Date Deposited: 06 May 2020 07:48
FoR Codes: 40 ENGINEERING > 4006 Communications engineering > 400608 Wireless communication systems and technologies (incl. microwave and millimetrewave) @ 100%
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