Experimental evaluation of a reconfigurable antenna system for blind interference alignment
Experimental evaluation of a reconfigurable antenna system for blind interference alignment
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DOI：
10.1109/wamicon.2016.7483855
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
Simon Begashaw;James Chacko;Nikhil Gulati;D. Nguyen;Nagarajan Kandasamy;K. Dandekar
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文献类型：
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作者：
Simon Begashaw;James Chacko;Nikhil Gulati;D. Nguyen;Nagarajan Kandasamy;K. Dandekar
近年来，已有一些实验研究来验证干扰对齐（IA）的理论发现，但只有少数研究集中在盲干扰对齐。与IA和其他干扰缓解技术不同，盲IA不需要发射机处的信道状态信息（CSIT）。关键的见解是，发射机使用信道相干间隔的知识，接收机利用可重构天线来创建由发射机利用的信道波动。在这项工作中，我们提出了一种新的实验评估的可重构天线系统实现盲IA。我们提出了一种盲IA技术的基础上可重构天线的2用户多输入单输出（MISO）的广播信道上实现的软件定义的无线电平台，每个接收器都配备了一个可重构天线。我们进一步比较了这种盲IA实现与传统的TDMA方案的基准测试的目的。我们表明，在实际信道条件下，使用测量信道可以实现盲IA的可实现速率。此外，平均误差矢量幅度和误码率（BER）性能进行了评估。
In recent years, several experimental studies have come out to validate the theoretical findings of interference alignment (IA), but only a handful of studies have focused on blind interference alignment. Unlike IA and other interference mitigation techniques, blind IA does not require channel state information at the transmitter (CSIT). The key insight is that the transmitter uses the knowledge of channel coherence intervals and receivers utilize reconfigurable antennas to create channel fluctuations exploited by the transmitter. In this work, we present a novel experimental evaluation of a reconfigurable antenna system for achieving blind IA. We present a blind IA technique based on reconfigurable antennas for a 2-user multiple-input single-output (MISO) broadcast channel implemented on a software defined radio platform where each of the receivers is equipped with a reconfigurable antenna. We further compare this blind IA implementation with traditional TDMA scheme for benchmarking purposes. We show that the achievable rates for blind IA can be realized in practice using measured channels under practical channel conditions. Additionally, the average error vector magnitude and bit error rate (BER) performances are evaluated.