Achievable and Crystallized Rate Regions of the Interference Channel with Interference as Noise
Achievable and Crystallized Rate Regions of the Interference Channel with Interference as Noise
复制标题
DOI：
10.1109/twc.2012.010312.110497
复制
发表时间：
2012-03-01
影响因子：
10.4
通讯作者：
Paulraj, Arogyaswami
中科院分区：
文献类型：
--
作者：
Charafeddine, Mohamad Awad;Sezgin, Aydin;Paulraj, Arogyaswami
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联合的凸船体，其中每个功率控制速率区域的上界由（n-1）维超曲面表征，该超曲面的特征在于具有以全功率发射的发射机之一。凸船体操作适合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，作为分时凸船体施加到这些角落点，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。
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.