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We consider the problem of maximizing the total wireless signal power delivered by a distributed antenna array to a receiver where the transmitting nodes each have known frequency-selective channel responses to the receiver and are subject to individual total transmit power constraints. This optimization problem is mathematically quite different from the power maximization problems involving single...
We study a three-node network with a full-duplex base-station communicating with one uplink and one downlink half-duplex node. In this network, both self-interference and inter-node interference are present. We use an antenna-theory-based channel model to study the spatial degrees of freedom of such network, and study if and how much does spatial isolation outperforms time-division (i.e. half-duplex)...
Within the context of faster-than-Nyquist signaling, a low-complexity multicarrier system based on short-length filters and zero-forcing turbo equalization is introduced. Short-length filters allow a reduced-size block processing while zero-forcing equalization allows a linear reduced-complexity implementation. Furthermore, rectangular and out-of-band energy minimization pulse shaping demonstrates...
As a complicated distributed system, distributed MIMO radars are vulnerable to cybersecurity attacks against its three key components: the transmitters, the receivers, and the communication links that connect them and the fusion center. In this paper, we investigate the impact of cybersecurity attacks on detection performance of a distributed MIMO radar. We show that the detection performance degrades...
This work introduces a class of molecular timing (MT) channels, where information is modulated on the release timing of multiple indistinguishable information particles and decoded from the times of arrival at the receiver. The particles are assumed to have a finite lifetime. The capacity of the MT channel, as well as an upper bound on this capacity, are derived for the case where information particles...
Recent advances in Milimeter wave (mmWave) band mobile communications may provide solutions to the increasing traffic demand in modern wireless systems. Even though mmWave bands are scarcely occupied, the design of a prospect transceiver should guarantee the efficient coexistence with the incumbent services in these bands. To that end, in this paper, two underlay cognitive transceiver designs are...
This paper analyzes the strategic communication paradigm over a sensor network. We consider optimal communication strategies in a sensor network where each sensor is strategic and aims to maximize its own objective which involves type and source random variables. The objective of the receiver is to minimize the estimation error associated with the source. The orthogonal multiple access channel model...
We consider a dynamic game with T non-cooperative agents that act in a pre-specified sequence. The information available to an agent may depend on actions taken by preceding agents. We showed that this dynamic game is equivalent to a static game where agents' information has no dependence on decisions. This equivalence suggests that questions of equilibrium existence and equilibrium characterization...
We consider wireless backhauling in mobile networks, employing large-scale full-dimension MIMO antenna arrays on both sides of the link. Our focus is on design strategies for transmit and receive antenna combiners, assuming FDD transmission and limited feedback operation. We investigate the performance of two competing philosophies: 1) An algebraic approach in which antenna combiners are calculated...
A required feature for the next generation of wireless communication networks will be the capability to serve simultaneously a large number of devices with heterogeneous CSIT qualities and demands. In this paper, we consider the overloaded MISO BC with two groups of CSIT qualities. We propose a transmission scheme where degraded symbols are superimposed on top of spatially-multiplexed symbols. The...
In underlay Device-to-Device (D2D) communication, where a D2D pair reuses the cellular spectrum and creates interference to regular cellular users, there exists a tradeoff between the achieved D2D rate and the interference to cellular users. In this work, we present stochastic optimization solutions to allocate the D2D transmission power over multiple resource blocks (RBs), to maximize the D2D rate,...
The employment of partial zero-forcing (PZF) receivers at the base stations represents an efficient and low-complexity technique for uplink interference management in cellular networks. In this paper, we focus on the performance analysis of ultra-dense networks (UDNs) in which the multi-antenna receivers adopt PZF. We provide both integral expressions and tight closed-form approximations for the probability...
We analyze limited feedback in systems where a multiple-antenna transmitter sends signals to single-antenna receivers with finite-bit ADCs. If channel state information (CSI) is not available with high resolution at the transmitter and the precoding is not well designed, the inter-user interference is a big decoding challenge for receivers with low-resolution quantization. In this paper, we derive...
mm-Wave communications and massive MIMO are two promising technologies to increase the capacity and coverage of future cellular networks. Channel sparsity, where there exist only few propagation paths enabling signal transmission to and reception from mobile users, is a key property of mm-Wave channels. In this paper, we consider the downlink transmission over a sparse massive MIMO channel and propose...
We propose a linear transceiver scheme for the asymmetric two-user multiple access channel with additive Gaussian noise and quantized feedback. The quantized feedback link is modeled as an information bottleneck subject to a rate constraint. We introduce a superposition scheme that splits the transmit power between an Ozarow-like linear-feedback code and a conventional code that ignores the feedback...
We consider the problem of keyless message authentication over noisy channels in the presence of an active adversary. Different from the existing models, in our model, the legitimate users do not have any pre-shared key for authentication. Instead, we use the noisy channel connecting the legitimate users for authentication. The main idea is to utilize the noisy channel connecting the legitimate users...
A two-stage downlink beamforming design is proposed for multicell multi-input single-output channels with limited backhaul capacity and local channel state information (CSI). The first stage is to maximize the signal-to-leakage-plus-noise ratio with local CSI. Each base station (BS) then calculates the corresponding channel gains and shares them with all other BSs, which typically requires low-rate...
We describe a class of scalable algorithms for shaping the transmission pattern of a distributed antenna array to steer beams and nulls to cooperating receivers. The key distinguishing feature of these algorithms is that no explicit channel state feedback from the receiver to individual transmitters, no channel reciprocity and minimal coordination between the transmitters is required. Instead, these...
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