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This paper presents an achievable rate region for a 2-user Gaussian Z-interference channel with a noiseless and bidirectional digital communication link between the receivers. The region is achieved by utilizing the rate-splitting encoding technique, and the decode-and-forward and compress-and-forward strategies. In the very strong interference regime, the capacity region is achieved. In the weak...
The conventional Gaussian multiple-input multiple-output (MIMO) broadcast channel (BC)- multiple-access channel (MAC) duality has previously been applied to solve non-convex BC capacity computation problems. However, this conventional duality approach is applicable only to the case in which the base station (BS) of the BC is subject to a single sum-power constraint. An alternative approach is the...
In most wireless communication networks, nodes are fitted with radios that can both transmit and receive. This sets up the possibility of cooperation among the nodes. To study the role of cooperation in interference management, we consider a two-user linear deterministic interference channel where the source/destination nodes can both talk and listen. We focus on the symmetric channel with nodes operating...
In this paper we consider power allocation policies for 2-user Gaussian interference channels (IFC) with ergodic fading, perfectly known at all terminals. Based on recently found outer bounds on the capacity region of unfaded IFCs, we determine the power allocation that maximizes a sum-rate outer bound. With this power allocation both users are simultaneously active when the power of the interfering...
Treating interference as noise has recently been shown to be sum capacity achieving for the two-user single-input single-output (SISO) Gaussian interference channel in a low interference regime. In this paper, we characterize the low interference regime for the multiple-input single-output (MISO) Gaussian interference channel. We also provide partial results for the general multiple-input multiple-output...
We develop an outer bound for the secrecy capacity region of a class of multiple access wiretap channels (MAC-WT). In this class, which we call the weak eavesdropper class, each user's link to the legitimate receiver is stronger than its link to the eavesdropper. Our outer bound partially matches the achievable region in an n-letter form. In addition, a looser version of our outer bound provides close...
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