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http://dx.doi.org/10.5573/ieie.2016.53.10.015

Performance Analysis of New LMMSE Channel Interpolation Scheme Based on the LTE Sidelink System in V2V Environments  

Chu, Myeonghun (School of Electronics & Computer Engineering Chonnam National University)
Moon, Sangmi (School of Electronics & Computer Engineering Chonnam National University)
Kwon, Soonho (School of Electrical, Electronics & Communication Engineering, Korea University of Technology and Education)
Lee, Jihye (School of Electronics & Computer Engineering Chonnam National University)
Bae, Sara (School of Electronics & Computer Engineering Chonnam National University)
Kim, Hanjong (School of Electrical, Electronics & Communication Engineering, Korea University of Technology and Education)
Kim, Cheolsung (School of Electronics & Computer Engineering Chonnam National University)
Kim, Daejin (School of Electronics & Computer Engineering Chonnam National University)
Hwang, Intae (School of Electronics & Computer Engineering Chonnam National University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.53, no.10, 2016 , pp. 15-23 More about this Journal
Abstract
To support the telematics and infotainment services, vehicle-to-everything (V2X) communication requires a robust and reliable network. To do this, the 3rd Generation Partnership Project (3GPP) has recently developed V2X communication. For reliable communication, accurate channel estimation should be done. However, because vehicle speed is very fast, radio channel is rapidly changed with time. Therefore, it is difficult to accurately estimate the channel. In this paper, we propose the new linear minimum mean square error (LMMSE) channel interpolation scheme based on the Long Term Evolution (LTE) sidelink system in vehicle-to-vehicle (V2V) environments. In our proposed reduced decision error (RDE) channel estimation scheme, LMMSE channel estimation is applied in the pilot symbol, and then in the data symbol, smoothing and LMMSE channel interpolation scheme is applied. After that, time and frequency domain averaging are applied to obtain the whole channel frequency response. In addition, the LMMSE equalizer of the receiver side can reduce the error propagation due to the decision error. Therefore, it is possible to detect the reliable data. Analysis and simulation results demonstrate that the proposed scheme outperforms currently conventional schemes in normalized mean square error (NMSE) and bit error rate (BER).
Keywords
LMMSE; LTE; RDE; Smoothing; V2V; V2X;
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