Lim Chiwoo, Jang Min, Kim Sang-Hyo
College of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, Korea.
Samsung Electronics Co., Ltd., Suwon 16677, Korea.
Sensors (Basel). 2018 Apr 17;18(4):1228. doi: 10.3390/s18041228.
In this paper, a new non-orthogonal multiple-access scheme, trellis tone modulation multiple-access (TTMMA), is proposed for peer discovery of distributed device-to-device (D2D) communication. The range and capacity of discovery are important performance metrics in peer discovery. The proposed trellis tone modulation uses single-tone transmission and achieves a long discovery range due to its low Peak-to-Average Power Ratio (PAPR). The TTMMA also exploits non-orthogonal resource assignment to increase the discovery capacity. For the multi-user detection of superposed multiple-access signals, a message-passing algorithm with supplementary schemes are proposed. With TTMMA and its message-passing demodulation, approximately 1.5 times the number of devices are discovered compared to the conventional frequency division multiple-access (FDMA)-based discovery.
本文提出了一种新的非正交多址接入方案——网格音调调制多址接入（TTMMA），用于分布式设备到设备（D2D）通信的对等发现。发现范围和容量是对等发现中的重要性能指标。所提出的网格音调调制采用单音传输，由于其低峰均功率比（PAPR）而实现了长发现范围。TTMMA还利用非正交资源分配来提高发现容量。针对叠加多址接入信号的多用户检测，提出了一种带有补充方案的消息传递算法。通过TTMMA及其消息传递解调，与传统的基于频分多址接入（FDMA）的发现相比，发现的设备数量增加了约1.5倍。
