Sujin Kim, Soyi Kim, Seungyeob Chae, Sangjin Cho, Eulhyeon Go, M. Rim
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引用次数: 2
摘要
在D2D (device-to-device)通信系统中，OFDMA (orthogonal frequency division multiple access，正交频分多址)被广泛用于保证通信覆盖范围和保持与蜂窝系统的相似性。为了避免蜂窝和D2D系统之间的严重干扰，可以使用覆盖方案，其中D2D设备使用上行OFDMA资源的专用子信道。然而，OFDMA系统中的子信道并非完全正交，并且由于带内发射，子信道之间仍然存在一定的干扰。D2D通信有许多优点，即使对于距离不是很近的设备，也可以通过使用D2D继电器来享受这些优点。本文讨论了基于ofdma的D2D覆盖系统中考虑带内发射的最佳中继位置。
Relay location considering in-band emission for OFDMA-based D2D overlay systems
In device-to-device (D2D) communication systems, orthogonal frequency division multiple access (OFDMA) is widely used to secure the communication coverage and maintain the similarity with cellular systems. In order to avoid severe interference between cellular and D2D systems, one can use overlay schemes, where D2D devices use dedicated sub-channels of uplink OFDMA resources. However, sub-channels in OFDMA systems are not completely orthogonal and there is still some interference between sub-channels due to in-band emission. There are many advantages of D2D communications and the advantages can be enjoyed even for not-very-close devices by using D2D relays. In this paper, we discuss the optimal relay location taking care of in-band emission for OFDMA-based D2D overlay systems.
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