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Synthetization of Virtual Transmit Antennas for MIMO OFDM Radar by Space-Time Coding
IEEE Transactions on Aerospace and Electronic Systems ( IF 4.4 ) Pub Date : 2020-12-22 , DOI: 10.1109/taes.2020.3046332
Daniel Schindler , Benedikt Schweizer , Christina Knill , Jurgen Hasch , Christian Waldschmidt

Recent publications have investigated and demonstrated new digital modulation techniques that allow realization of orthogonal frequency division multiplexing (OFDM) radar with relatively low hardware effort. This is especially interesting as the digitally defined signals offer additional freedom for multiplexing schemes of multiple-input multiple-output (MIMO) radar sensors. MIMO radar sensors rely on strictly orthogonal signals to distinguish between multiple transmitters (TX). To span a virtual array with a maximum number of antenna positions, a novel method that combines orthogonal signals with strongly correlated signals generated by space-time coding (STC) is introduced. This leads to virtual transmit antenna positions that are used to improve the unambiguous angular area of an otherwise ambiguous MIMO antenna array. The proposed method is validated with an integrated OFDM radar at millimeter-wave frequencies.

中文翻译:

空时编码的MIMO OFDM雷达虚拟发射天线合成

最近的出版物研究并展示了新的数字调制技术,这些技术允许以相对较低的硬件工作量实现正交频分复用 (OFDM) 雷达。这尤其有趣,因为数字定义的信号为多输入多输出 (MIMO) 雷达传感器的多路复用方案提供了额外的自由度。MIMO 雷达传感器依靠严格正交的信号来区分多个发射器 (TX)。为了跨越具有最大天线位置数的虚拟阵列,引入了一种将正交信号与由空时编码 (STC) 生成的强相关信号相结合的新方法。这导致虚拟发射天线位置用于改善原本不明确的 MIMO 天线阵列的明确角区域。
更新日期:2020-12-22
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