Ergodic interference alignment for the SIMO/MIMO interference channel

2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) Pub Date : 2014-05-04 DOI:10.1109/ICASSP.2014.6854790

Yohan Lejosne, D. Slock, Y. Yuan-Wu

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引用次数: 2

Abstract

Ergodic interference alignment (IA) is a simple yet powerful tool that not only achieves the optimal K/2 degrees of freedom (DoF) of the K-user single-input single-output (SISO) interference channel (IC), but also allows each user to achieve at least half of its interference-free capacity at any SNR. By considering more general message sets, Nazer et al. also covered the MISO case. In this paper, we consider first the SIMO interference channel and extend ergodic IA techniques to this setting with N_r receive antennas. Our scheme achieves KN_r/(N_r + 1), which is the DoF yielded by (standard) IA and is also the DoF of the channel when K > N_r. Moreover, this technique exhibits spatial scale invariance. By combining the existing MISO and the new SIMO results, we can also cover MIMO with N_t transmit antennas for the cases where either N_t/N_r or N_r/N_t is an integer R, yielding DoF =3D min(N_t, N_r)KR/(R + 1) which is optimal for K > R.

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SIMO/MIMO干扰通道的遍历干扰对准

遍历干扰对准(IA)是一种简单但功能强大的工具，它不仅可以实现K-用户单输入单输出(SISO)干扰通道(IC)的最佳K/2自由度(DoF)，而且还允许每个用户在任何信噪比下实现至少一半的无干扰容量。通过考虑更一般的消息集，Nazer等人也涵盖了MISO的情况。在本文中，我们首先考虑SIMO干扰信道，并将遍历IA技术扩展到具有Nr接收天线的这种设置。我们的方案实现了KNr/(Nr + 1)，这是(标准)IA产生的DoF，也是K > Nr时信道的DoF。此外，该技术具有空间尺度不变性。通过结合现有的MISO和新的SIMO结果，我们还可以在Nt/Nr或Nr/Nt为整数R的情况下覆盖Nt发射天线的MIMO，从而得到DoF =3D min(Nt, Nr)KR/(R + 1)，这是K > R的最佳选择。

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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2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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