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The Link-16 is the tactical data link utilized by the Joint Tactical Information Distribution System (JTIDS). The JTIDS system is important due to its wide use by U.S. armed forces, NATO, and other allied militaries. Link-16 is a hybrid frequency-hopped/direct sequence spread spectrum system that utilizes minimum-shift keying (MSK) to modulate the chips, cyclical code-shift keying (CCSK) to modulate...
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...
Ad hoc networks are one operational mode of IEEE802.11 wireless local area networks (WLANs) in which users form themselves the network and act as routers to one another. When the density of such a network is high, capacity becomes limited by the interference resulting from the collisions between simultaneously transmitted packets. Interference gets even worse in the case of reliable transport based...
We study a fading linear finite-field relay network having multiple source-destination pairs. Because of the interference created by different unicast sessions, the problem of finding its capacity region is in general difficult. We observe that, since channels are time-varying, relays can deliver their received signals by waiting for appropriate channel realizations such that the destinations can...
We study a three-node Gaussian relay channel with interference which is non-causally known at the source. It is assumed that the interference affects only the relay-destination link. This model is motivated by a downlink scenario, where the source (base station), communicates with two destinations. We present several transmission strategies for this class of relay channels. Our proposed relaying schemes...
We propose a practical scheme for binary dirty-paper channels. By exploiting the concept of random binning instead of superposition coding, the complexity of the system is greatly reduced. For comparison, the existing approaches require one of the native codes to be of non-uniform a priori distribution, which is generally achieved by combining a symbol mapper and high-order-alphabet low-density parity-check...
We consider a relay network having K source-destination pairs. Finding the capacity region of such a network with multiple unicast sessions is in general difficult. By focusing on a special class of such networks, we show that the capacity can be found. Namely, we consider a linear finite-field channel model, which can model interference in the network. Furthermore, we assume time-varying channels...
This paper discusses the impact of relaying in interference-limited networks by studying a two-user Gaussian interference channel with a relay (ICR). Various models for relay reception and transmission are possible: The relay can receive and transmit in the same band as the sources (i.e., in-band relay reception/transmission), or else relay reception, or both reception and transmission, can take place...
The optimality of separable encoding and decoding over parallel channels (fading states) for ergodic fading two-user interference channels (IFCs) is studied using a one-sided IFC as a model. For an ergodic fading one-sided IFC with non-fading direct links and a fading cross-channel link, it is shown that separability can be strictly suboptimal except for the cases where all the parallel channels are...
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