Interference Alignment and Spatial Degrees of Freedom for the K User Interference Channel

Interference Alignment and Spatial Degrees of Freedom for the K User Interference Channel
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DOI：
10.1109/icc.2008.190
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发表时间：
2007-07
期刊：
2008 IEEE International Conference on Communications
影响因子：
--
通讯作者：
V. Cadambe;S. Jafar
V. Cadambe;S. Jafar
中科院分区：
其他
文献类型：
--
作者：
V. Cadambe;S. Jafar

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我们表明，K个用户频率选择性（或时变）干扰信道的总容量是C（SNR）=（K/2）log（SNR）+o（log（SNR）），这意味着该信道在每个正交的时间和频率维度上总共有K/2个自由度。干扰对齐和迫零的线性方案足以实现所有的自由度，并且不需要多用户检测。
We show that the sum capacity of the K user frequency selective (or time-varying) interference channel is C(SNR) = (K/2) log(SNR) +o(log(SNR)) meaning that the channel has a total of K/2 degrees of freedom per orthogonal time and frequency dimension. Linear schemes of interference alignment and zero forcing suffice to achieve all the degrees of freedom and multi-user detection is not required.