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Development of an error vector testbed for a DSP based half-duplex retrodirective multi-antenna system.

机译：为基于DSP的半双工逆向多天线系统开发了误差矢量测试平台。

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摘要

Ever-increasing demand for wireless communication devices and services puts unprecedented pressure on the use of the available wireless spectrum. As wireless device manufacturers try to cram more functionalities into their devices, the need for more power efficient wireless transmission techniques also arise. As the communication modulation schemes go digital, researchers around the world have come up with coding and compression schemes that strive to meet these requirements of spectral efficiency and low power operation. In the recent past, antenna techniques have come to the forefront of research interest due to their ability to provide low-cost and efficient solutions to the above mentioned problems. Retrodirective antenna array techniques have generated considerable interest among research circles as well as in the wireless industry due to its ability to exploit the spatial dimension of wireless communications. The advantage of such techniques is that it is possible to direct radio transmission towards the intended recipient, which allows for more efficient use of the spectrum. Retrodirective techniques are also computationally less intensive compared to beam-forming techniques, which translates to low-power implementations.; Many schemes have been proposed to achieve retrodirectivity including the use of digital signal processing techniques. However, the diverse digital wireless communication schemes pose a considerable challenge when it comes to quantitatively measuring the quality of a retrodirective system. Therefore, it becomes necessary to perform the analysis in time, frequency and modulation domains in order to obtain an insight into the wireless system performance. Error Vector Magnitude (EVM) measurements by virtue of their ability to process the signals in full vector (magnitude and phase), provides us with a quantitative figure-of-merit for a digitally modulated signal. EVM measurements provide us with valuable insight into the wireless system performance and offer us with the knowledge to troubleshoot wireless systems. This thesis presents a versatile and reconfigurable vector error measurement test setup, which is used to analyze the error performance of a retrodirective system in terms of its EVM and Bit Error Rate (BER). The retrodirective advantage is quantified and is compared with that of a conventional non-retrodirective antenna array.
机译：对无线通信设备和服务的需求不断增长，给使用可用的无线频谱带来了前所未有的压力。随着无线设备制造商试图在其设备中添加更多功能，也出现了对更省电的无线传输技术的需求。随着通信调制方案的数字化，世界各地的研究人员都提出了编码和压缩方案，这些方案致力于满足频谱效率和低功耗操作的这些要求。在最近的过去，由于天线技术能够为上述问题提供低成本和有效的解决方案，因此已经成为研究兴趣的前沿。定向天线阵列技术由于其能够利用无线通信的空间维度而引起了研究界以及无线行业的极大兴趣。这种技术的优点是可以将无线电传输引向预期的接收者，从而可以更有效地利用频谱。与波束形成技术相比，逆向技术的计算强度也较低，这可以转化为低功率实现。已经提出了许多方案来实现逆向性，包括使用数字信号处理技术。然而，当涉及定量测量逆向系统的质量时，各种数字无线通信方案提出了相当大的挑战。因此，有必要在时域，频域和调制域中进行分析，以了解无线系统的性能。误差矢量幅度（EVM）测量凭借其处理全矢量（幅度和相位）信号的能力，为我们提供了数字调制信号的定量品质因数。 EVM测量为我们提供了有关无线系统性能的宝贵见解，并为我们提供了解决无线系统故障的知识。本文提出了一种通用且可重新配置的矢量误差测量测试装置，该装置用于根据EVM和误码率（BER）来分析逆向系统的误码性能。逆向优势得到了量化，并与传统的非逆向天线阵列进行了比较。

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  • 作者

    Warrier, Arjun.;

  • 作者单位

    Dalhousie University (Canada).;

  • 授予单位 Dalhousie University (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.A.Sc.
  • 年度 2007
  • 页码 69 p.
  • 总页数 69
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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