Inter-Mode Interference Suppression Employing Even-Numbered Modes for UCA-Based OAM Multiplexing
Inter-Mode Interference Suppression Employing Even-Numbered Modes for UCA-Based OAM Multiplexing
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DOI：
10.1109/gcwkshps45667.2019.9024598
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
Hirofumi Suganuma;Shuhei Saito;K. Ogawa;F. Maehara
中科院分区：
文献类型：
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作者：
Hirofumi Suganuma;Shuhei Saito;K. Ogawa;F. Maehara
提出了一种基于均匀圆阵列（UCA）的轨道角动量（OAM）复用仅采用偶数模的模间干扰抑制方法。当光束轴线不对准时，相邻OAM模式的干扰会变得严重，因此该方法只使用偶数模式，不使用奇数模式，有效地防止了模间干扰。此外，我们通过将其应用于单独具有零强制（ZF）的多输入多输出（MIMO）或具有连续干扰消除的ZF来验证所提出方法的有效性，因为在每个模式下从多个uca传输多个流会引起严重的模间干扰。在系统容量方面，通过计算机仿真验证了该方法与传统方法相比的有效性。
This paper proposes an inter-mode interference suppression method that employs only even-numbered modes for uniform circular array (UCA)-based orbital angular momentum (OAM) multiplexing. Given that interference from adjacent OAM modes becomes severe when the beam axis is misaligned, the proposed method uses only the even-numbered modes while leaving the odd-numbered modes unused, which effectively prevents the inter-mode interference. Moreover, we verify the effectiveness of the proposed method by applying it to multiple-input and multiple-output (MIMO) with zero-forcing (ZF) alone or ZF with successive interference cancellation because severe inter-mode interference is caused by transmitting multiple streams from multiple UCAs in each mode. The effectiveness of the proposed method compared with the traditional method, which uses all OAM modes, is demonstrated in terms of the system capacity through computer simulations.