一个MIMO硬件演示:空时分组码的应用

Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI:10.1109/ISSPIT.2003.1341069

R. Seeger, L. Brötje, K. Kammeyer

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引用次数: 4

摘要

我们提出了一种用于工业、科学和医疗(ISM)波段传输(MASI)的多天线系统。硬件样机是在我所开发和实现的。它支持多输入多输出(MIMO)通信应用，并且能够使用8个发射天线和8个接收天线并行传输任意信号。它工作在2.4 GHz ism频段。介绍了系统的硬件概念，讨论了系统的设计规范。作为应用实例，我们重点研究了一类特殊的发射分集方案:正交空时分组码(OSTBC)。信道和载波偏置估计是相干接收机中的重要任务。然而，由于所采用算法的不完善，也存在一些误差源。通过仿真和测量结果表明，与传统的单发射天线系统相比，基于OSTBC的系统对信道估计误差和/或载波频率偏移更敏感。结果是在估计误差的情况下，分集增益显著降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A MIMO hardware demonstrator: application of space-time block codes

We present a multiple antenna system for industrial, scientific, and medical (ISM)-band transmission (MASI). The hardware demonstrator was developed and realized at our institute. It enables the multiple input multiple output (MIMO)-communication applications and is capable of transmitting arbitrary signals using the 8 transmit and 8 receive antennas in parallel. It operates in the 2.4 GHz ISM-band. The hardware concept is introduced and some design specifications are discussed. As an application example, we focus on one specific class of transmit diversity schemes: orthogonal space-time block codes (OSTBC). Channel and carrier offset estimation are essential tasks in coherent receivers. However, there are also some kind of error sources due to the imperfections of the employed algorithm. We show, by simulation and measurement results, that the OSTBC based systems are more sensitive to channel estimation errors and/or carrier frequency offsets than the conventional single transmit antenna systems. The consequence is that the diversity gain decreases significantly in the case of estimation errors.

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Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)

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