Performance improvement by transmit diversity technique for implant ultra-wideband communication
Performance improvement by transmit diversity technique for implant ultra-wideband communication
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DOI：
10.1049/iet-map.2015.0688
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发表时间：
2016-07
影响因子：
1.7
通讯作者：
Yuto Shimizu;Tomofumi Furukawa;D. Anzai;Jianqing Wang
中科院分区：
文献类型：
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作者：
Yuto Shimizu;Tomofumi Furukawa;D. Anzai;Jianqing Wang
在植入体局域网（BAN）中，超宽带（UWB）技术是一种很有希望的候选技术，以适应高数据速率。然而，由于其频率，UWB信号在植入体通信链路中遭受大的衰减。这一事实表明实现可靠通信的困难。为了实现可靠的通信，众所周知，空间分集技术是有效的。在这项研究中，作者注意到这样一个事实，即它是可能的进一步简化的UWB天线，由于其非常高的频率。然后，作者的目标是开发一种发射极化分集天线植入超宽带通信，并应用开发的发射分集系统的超宽带脉冲无线电（UWB-IR）计划和多频带正交频分复用（MB-OFDM）计划，分别。为了评估所提出的系统，作者首先使用时域有限差分数值分析技术分析了植入超宽带信道中的传播特性。然后，作者评估和讨论了这两种调制方案的发射极化分集的通信性能。结果，在7 cm的通信距离处，对于MB-OFDM方案和对于UWB-IR方案，吞吐量分别达到300 Mbps和30 Mbps。
In implant body area networks (BANs), an ultra-wideband (UWB) technology is a promising candidate to accomuplish high data rate. However, due to its frequency, the UWB signals suffer from large attenuation in the implant communication link. This fact suggests the difficulty on achieving reliable communication. For achieving reliable communication, it is well known that a spatial diversity technique is efficient. In this study, the authors pay attention to the fact that it is possible to further miniaturise the UWB antenna due to its very high frequency. Then, the authors aim to develop a transmit polarisation diversity antenna for implant UWB communications, and apply the developed transmit diversity system to a UWB-impulse radio (UWB-IR) scheme and a multiband-orthogonal frequency division multiplexing (MB-OFDM) scheme, respectively. For evaluating the proposed system, the authors first analyse the propagation characteristics in the implant UWB channel, using the finite difference time domain numerical analysis technique. Then, the authors evaluate and discuss the communication performances of the both modulation schemes for the transmit polarisation diversity. As a result, at a communication distance of 7 cm, the throughputs have accomplished to 300 Mbps for the MB-OFDM scheme and 30 Mbps for UWB-IR scheme, respectively.