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arXiv 1111.1048cs.ITmath.IT
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以干扰为噪声的干扰信道的可压缩速率区和可结晶速率区

Achievable and Crystallized Rate Regions of the Interference Channel with Interference as Noise

Mohamad Awad Charafeddine, Aydin Sezgin, Zhu Han, Arogyaswami Paulraj

摘要:

当干扰被视为噪声时,给出了干扰信道可达速率域。该公式从2用户信道开始,然后将结果扩展到n用户情况。速率区域被发现是n个功率控制速率区域的并集的凸包,其中每个功率控制速率区域由(n-1)维超曲面上界,该超曲面的特征在于具有以全功率发射的发射机之一。凸包操作使其自身适于取决于这些超曲面的凸性行为的分时操作。为了知道何时使用分时而不是功率控制,本文详细研究了2用户信道的超曲面凸性行为,并给出了与对称信道有关的具体结果。据观察,大部分的可实现的速率区域可以通过使用简单的开/关二进制功率控制结合分时覆盖。二进制功率控制在n维空间中创建了几个角点。结晶速率区域,命名后,其产生的晶体形状,因此,作为分时凸包强加到这些角落点,从而提供了一个可行的新的角度来看,在可实现的速率区域的干扰信道。

英文摘要:

The interference channel achievable rate region is presented when the interference is treated as noise. The formulation starts with the 2-user channel, and then extends the results to the n-user case. The rate region is found to be the convex hull of the union of n power control rate regions, where each power control rate region is upperbounded by a (n-1)-dimensional hyper-surface characterized by having one of the transmitters transmitting at full power. The convex hull operation lends itself to a time-sharing operation depending on the convexity behavior of those hyper-surfaces. In order to know when to use time-sharing rather than power control, the paper studies the hyper-surfaces convexity behavior in details for the 2-user channel with specific results pertaining to the symmetric channel. It is observed that most of the achievable rate region can be covered by using simple On/Off binary power control in conjunction with time-sharing. The binary power control creates several corner points in the n-dimensional space. The crystallized rate region, named after its resulting crystal shape, is hence presented as the time-sharing convex hull imposed onto those corner points; thereby offering a viable new perspective of looking at the achievable rate region of the interference channel.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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