Wireless communication in substation scenarios can be seriously degraded by impulsive noise. In this paper, we aim to investigate and mitigate the impact of impulsive noise for substation communications. Specifically, symmetric alpha-stable (SaS) distribution is used to model the impulsive noise and channel in substation scenario is modeled as a frequency selective fading channel with additive impulsive noise. Based on weighted fractional Fourier transform (WFRFT), a hybrid carrier (HC) scheme that is compatible with both conventional single carrier (SC) and multi-carrier (MC) schemes is introduced. Further, the WFRFT-based HC system combined with Alamouti scheme, referred as to HC-Alamouti, is proposed to mitigate the adverse effects of impulsive noise and frequency selective fading in substation scenarios. The impulsive noise mitigation mechanism of the proposed HC-Alamouti scheme is analyzed. Moreover, simulation results are given to show the superiority of the proposed HC-Alamouti system in terms of bit error rate (BER).
Hybrid Carrier and STBC based Impulsive Noise Suppression for Substation Communications
2020-11-01
1253510 byte
Conference paper
Electronic Resource
English
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