On the degrees of freedom of multiantenna interfering broadcast channels

2014 International Conference on Information and Communication Technology Convergence (ICTC) Pub Date : 2014-12-15 DOI:10.1109/ICTC.2014.6983190

Sang-Woon Jeon, N. Lee

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Abstract

The degrees of freedom (DoF) of multiantenna interfering broadcast channels is studied in which the first base station (BS) with M₁ antennas wishes to send independent messages to its N₁ serving users and the second BS with M₂ antennas wishes to send independent messages to its N₂ serving users. Each user is assumed to be equipped with a single antenna. For max(M₁, M₂) ≤ min(N₁, N₂), the sum DoF is shown to be upper bounded by N₁(M₁N₂ - M₁M₂) + N₂(M₂N₁-M₁M₂)/N₁N₂-M₁M₂ and lower bounded by N₁N₂(M₁+M₂)/max(M₁ N₂, M₂N₁)+N₁N₂. The results characterize the optimal sum DoF if M₁N₂ = M₂N₁ and further characterize the asymptotically optimal sum DoF when both N₁ and N₂ tend to infinity. Specifically, the optimal sum DoF converges to M₁ +M₂ as N₁ and N₂ tend to infinity.

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多天线干扰广播信道的自由度研究

研究了多天线干扰广播信道的自由度，其中带有M1天线的第一个基站希望向N1个服务用户发送独立消息，而带有M2天线的第二个基站希望向N2个服务用户发送独立消息。假设每个用户都配备了一个天线。对于max(M1, M2)≤min(N1, N2)， DoF之和上界为N1(M1N2 -M1M2) + N2(M2N1-M1M2)/N1N2-M1M2，下界为N1N2(M1+M2)/max(M1 N2, M2N1)+N1N2。结果表征了M1N2 = M2N1时的最优和DoF，并进一步表征了N1和N2均趋于无穷时的渐近最优和DoF。具体来说，当N1和N2趋于无穷时，最优自由度和收敛于M1 +M2。

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 International Conference on Information and Communication Technology Convergence (ICTC)

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