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For conventional multiple-input and multiple-output (MIMO) selective decode-and-forward (S-DF) relaying network, without global channel knowledge, base station (BS) normally allocates its transmission power for the channel links between itself and its served users. In this case, if the received signal power at relay station (RS) is larger enough, RS will help BS decode and forward the messages. However,...
This paper investigates the power control problem for the uplink of a non-orthogonal multiple access (NOMA) system with two cells. The game-theoretic approach is used to study the stability of distributed power control algorithms. It is shown that a unique Nash equilibrium exists if the Perron- Frobenius eigenvalue of a certain link gain matrix is less than one. A distributed power control algorithm...
Spectrum sharing between radar and communications systems is currently under investigation because of the high demand for new wireless services and shortage of available bandwidth. To effectively design their coexistence, it is crucial to understand how current unaltered radar and communication systems would affect one another. This paper investigates the effect of radar interference on an uncoded...
Abstract-Interference is a key problem for multi-cell networks and interference alignment (IA) is a promising method to manage interference. This paper investigates whether a feasible IA scheme can improve the system performance of Device-to-Device(D2D) communication underlaying multiple-input-multiple-output (MU-MIMO) uplink in multi-cell networks. We propose a novel cell division pattern based on...
This paper considers a hybrid cochannel MIMO cellular network with both cellular and device-to-device (D2D) users, and studies, from a new perspective, mode selection (cellular or D2D mode) for the potential D2D users joining the network. We propose a new mode selection scheme that takes into account not only the interference caused to the potential D2D users, but also the interference caused by the...
The underlying models of sources of noise in flash memory are exploited to compute an accurate distribution of the threshold voltage of a cell after cancelling cell to cell interference (CCI). We analytically express the mean and variance of this voltage solely as a function of number of P/E cycles, retention time and data eliminating the read overhead of the adaptive estimation methods. To reduce...
In this work, the stability region of the broadcast channel (BC) is explored, where the receiver, for which the packets need to be kept secret from the other receiver has full-duplex (FD) capability. The effect of self-interference on the stability region has also been investigated. In particular, the stability region is characterized under two types of decoding schemes: (a) both the receivers perform...
The paper investigates the scenario of wireless multicast with a single transmitter and multiple relays that jointly deliver successively refined (or multi-resolution) sources to multiple receivers. An asynchronous cooperative joint source-channel coding (JSCC) protocol is proposed, which can mitigate the complexity and difficulty in signal synchronization under the wireless multicast with cooperative...
This paper studies the system-level reliability of 16nm MLC NAND flash memories under total ionizing dose (TID) effect. Errors that occur in the parts under TID effect are characterized at multiple levels. Results show that faithful data recovery only lasts until 9k rad. Data errors observed in irradiated flash samples are strongly asymmetric. To improve the reliability of the parts, we study error...
Underwater acoustic channels usually suffer from the extended multipath propagation which causes inter symbol interference (ISI). At the receiving end, serious ISI would result in the decrease of the reliability of underwater acoustic communication systems. In this paper, Turbo equalization is applied to increase the reliability of communication systems. The realization of the channel equalizer in...
The paper studies the scenario of wireless multicast with a single transmitter and a relay that jointly deliver successively refined (or multi-resolution) sources to multiple receivers. By taking the end-to-end mean square error distortion (EED) as the performance metric, the problems of power allocation at the transmitter and relay are formulated. Due to nonlinearity of the formulations, a generalized...
Telemetry systems suffer from inter-system interference due to other technologies competing for the shared unlicensed ISM/SRD band. The resultant collisions could have a profound impact on the underlying BLER performance of telemetry systems. A telegram splitting approach has been recently proposed in the literature that suggests splitting transmitted telemetry blocks into multiple telegrams and transmitting...
Vehicle-to-vehicle communications (V2V) has attracted the interest of research community in recent years because of its potential to increase safety and efficiency of roads and make connected-vehicles a reality. DSRC based vehicular networks are already standardized by IEEE 802.11 which supports communication among vehicles and road-side infrastructures. Different safety applications need to be tested...
In this paper we investigate the achievable sum-rates of device-to-device (D2D) communication assisted by decode-and-forward (DF) relay node. Firstly we introduce the operation principles of three communication transmission modes which are named as classical cellular communication mode, direct D2D communication mode and two-way-DF-relayed D2D communication mode. Then we derive the corresponding expressions...
For overcoming the scarcity of frequency resources, spectrum efficiency should be always enhanced by adopting the novel transmission methods. Nowadays, there are a few brilliant transmission technique in academic investigation area such as interference alignment, multi-cell beamforming and cooperative communication. Interference alignment has received the spotlight to enormously enhance the spectral...
Non-orthogonal multiple access (NOMA) is considered as a promising multiple access scheme for 5G downlink transmission. In this paper, we first review the existing downlink NOMA with successive interference cancellation (SIC) and then highlight some of the critical performance limiting factors related to SIC which can result in the performance degradation of NOMA. In order to alleviate the problems...
We describe models based on a multilayer topology for wireless multi-hop networks employing linear physical layer network coding, and accounting for the scheduling of transmission in such networks. We discuss algebraic frameworks for the network code mappings, and requirements for unambiguous decoding at the destination. With reference to some simple examples we show that a framework based on binary...
In visible light communication (VLC) networks, signals from densely deployed light sources strongly interfere with each other. Proper interference management is expected to improve the VLC system performance. In this article, we propose an optical interference alignment (OIA) approach to minimize mutual interference, where the conventional decoding-as-noise scheme is not applicable. A concrete algorithm...
The centrality of interleavers in interleave-division multiple-access (IDMA) cannot be over-emphasised, the interleaver being the only means of isolating signals for different users of the multiple-access system. This work gives a critical review of bit-error-rate (BER) performance of interleavers and IDMA systems. Existing literature shows that there are disagreements among results published by different...
Narrowband cyclostationary interference severely limits the performance of power line communications (PLC) on low-voltage in the [3–500] kHz frequency band. For the IEEE 1901.2 narrowband PLC standard system parameters, this interference is not sparse in the time or the frequency domains making recently-proposed sparse interference mitigation techniques ineffective. In this paper, we investigate other...
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