Distributed Antenna System Using Concurrent Transmission for Wireless Automation System
Distributed Antenna System Using Concurrent Transmission for Wireless Automation System
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DOI：
10.1109/vtcfall.2017.8288178
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发表时间：
2017-09
期刊：
影响因子：
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通讯作者：
Kulanuch Chutisemachai;Theerat Sakdejayont;Chun-Hao Liao;Makoto Suzuki;H. Morikawa
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文献类型：
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作者：
Kulanuch Chutisemachai;Theerat Sakdejayont;Chun-Hao Liao;Makoto Suzuki;H. Morikawa
本文提出在分布式天线系统中采用并发传输，以实现无线自动化系统的实时性和可靠性。我们的方案是实现空间分集最简单的方法，通过部署大量（例如几十个）发射天线，并允许所有发射天线在没有任何合作的情况下同时参与分组传输。我们在IEEE 802.15.4标准下的模拟和空中实验中测试了性能，包括数据包错误率和高可靠性面积百分比，其中实验使用Tmote Sky传感器节点与多达32个并发发射器进行。我们发现时序偏移的存在限制了性能。通过将时序偏移降低到芯片周期的一半以下，可以在不牺牲实时能力的情况下实现可靠的性能。
This paper proposes to adopt concurrent trans- mission in a distributed antenna system to achieve the real- time capability and reliability for wireless automation systems. Our scheme is the simplest way to realize spatial diversity by deploying a large number, e.g. several tens, of transmit antennas and allow all of them to participate in simultaneous packet transmission without any cooperation. We examine the performance, including packet error rate and high- reliability area percentage, in simulation and over-the-air experiments under the IEEE 802.15.4 standard, where the experiments are conducted with up to 32 concurrent transmitters using Tmote Sky sensor nodes. We found that the presence of a timing offset limits the performance. By lowering the timing offset to be below half of a chip period, the reliable performance can be achieved without sacrificing the real-time capability.