论文标题
离散的信号传导和将干扰视为高斯干扰通道的噪声
Discrete Signaling and Treating Interference as Noise for the Gaussian Interference Channel
论文作者
论文摘要
重新审视了两用户高斯干扰通道（G-IC），特别关注实际上可及的离散输入信号传导，并将干扰视为噪声（TIN）接收器。首先研究了相应的确定性干扰通道（D-IC），并提出了可以在TIN下实现D-IC整个容量区域的编码方案。然后将这些方案系统地转化为基于实价G-IC的纯离散输入的多层叠加编码方案。我们的分析表明，所提出的方案能够在所有通道参数的恒定差距内实现整个容量区域。据我们所知，这是整个容量区域和所有干扰制度的纯粹离散信号传导和TIN下的第一个恒定差距结果。此外，该方法已扩展为基于复杂值G-IC的离散输入获得编码方案。对于这种情况，分析了TIN下提议的方案的最小距离和可实现的速率，这考虑了通道引入的随机相位旋转的影响。仿真结果表明，我们的方案能够接近复合物值G-IC的容量区域，并且在各种干扰方案中都显着优于TIN的高斯信号传导。
The two-user Gaussian interference channel (G-IC) is revisited, with a particular focus on practically amenable discrete input signalling and treating interference as noise (TIN) receivers. The corresponding deterministic interference channel (D-IC) is first investigated and coding schemes that can achieve the entire capacity region of D-IC under TIN are proposed. These schemes are then systematically translate into multi-layer superposition coding schemes based on purely discrete inputs for the real-valued G-IC. Our analysis shows that the proposed scheme is able to achieve the entire capacity region to within a constant gap for all channel parameters. To the best of our knowledge, this is the first constant-gap result under purely discrete signalling and TIN for the entire capacity region and all the interference regimes. Furthermore, the approach is extended to obtain coding scheme based on discrete inputs for the complex-valued G-IC. For such a scenario, the minimum distance and the achievable rate of the proposed scheme under TIN are analyzed, which takes into account the effects of random phase rotations introduced by the channels. Simulation results show that our scheme is capable of approaching the capacity region of the complex-valued G-IC and significantly outperforms Gaussian signalling with TIN in various interference regimes.
