Grid-Based Channel Emulation Technique for Enabling Wireless Channel Emulator in Device-to-Device Communication

Abstract

Wireless channel emulator (WCE) allows site-specific evaluation of the wireless system with time-and cost-efficient and reproducible result. In addition to the conventional star topology between devices and a base station (BS), incorporating device-to-device (D2D) communication into WCE is essential. In this paper, the authors envision the concept and address the challenges of the two-layer grid-based channel emulation technique (2L-GBCE) to enable WCE in the D2D communication topology. The TV-CIR is synthesized from the pre-computed deterministic path parameters between two-layer grid structures representing both devices through interpolation. Performance is statistically evaluated in terms of average path gain, normalized delay spread, and Doppler spread profiles. The simulation was carried out at 5.25 GHz and the results qualitatively indicated the capability of the proposed emulating technique, as well as highlighting the effect of path clustering and grid size as challenges.