Discrete Signaling and Treating Interference as Noise for the Gaussian Interference Channel

The two-user Gaussian interference channel (G-IC) is revisited, with a particular focus on practically amenable discrete input signalling and treating as noise (TIN) receivers. corresponding deterministic (D-IC) first investigated coding schemes that can achieve the entire capacity region of D-IC under TIN are proposed. These then systematically translated into multi-layer superposition based purely inputs for real-valued G-IC. Our analysis shows proposed scheme able to within constant gap all parameters. To best our knowledge, this constant-gap result regimes. Furthermore, approach extended obtain complex-valued For such scenario, minimum distance achievable rate analyzed, which takes account effects random phase rotations introduced by channels. Simulation results show capable approaching G-IC significantly outperforms in various