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In this paper, we study the uplink of a cellular system using the linear deterministic approximation model, where there are two users transmitting to a receiver, mutually interfering with a third transmitter communicating with a second receiver. We give an achievable coding scheme and prove its optimality, i.e. characterize the capacity region. This scheme is a form of interference alignment which exploits the channel gain difference of the two-user cell

In this paper, we study a relaying network employing a rateless coding scheme proposed in the literature. We consider the problem of an energy-efficient operation of the scheme and derive algorithms that maximize the achievable rate for specified energy-per-bit bounds at the relay nodes. For this, we identify the rate function as a standard interference function, which allows to design efficient algorithmic solutions for solving the problem.Index Terms-Energy efficiency, relaying systems, rateless codes, standard interference functions, fixed-point iteration.

In this paper, we use the linear deterministic approximation model to study a two user multiple access channel (MAC) mutually interfering with a point to point link, which represents a basic model for the situation of device-to-device communication inside a cell. We derive upper bounds on the achievable sum rate and construct coding schemes achieving the upper bounds. For a large parameter range, the sum capacity is identical to the sum capacity of the interference channel obtained by silencing the weaker user in the MAC. For other interference configurations, the sum rate can be increased using interference alignment, which exploits the channel gain difference of the users in the MAC. From these results, lower bounds on the generalized degrees of freedom for the Gaussian counterpart are derived