IEEE Communications Letters

In this work, a complete interface between Ethernet and Visible Light Communications (VLC) networks is presented. It requires the use of previously proposed DPPM schemes for this kind of applications, but with some modifications so as to keep constant ...

Wire-tap channels are able to provide perfect secrecy when a receiver exhibits a better channel than its wiretapping opponent. In this letter, we extend the perfect secrecy principle to parallel Gaussian multiple input multiple output (MIMO) wire-tap ...

Thin client computing trades local processing for network bandwidth consumption by offloading application logic to remote servers. User input and display updates are exchanged between client and server through a thin client protocol. This thin client ...

Due to a high propagation delay in Underwater Sensor Networks (UWSNs), i.e., Spatial-Temporal Uncertainty, traditional approaches for solving the max-min fairness issue in terrestrial MACs do not work well in UWSNs. In this work, we address the max-min ...

This Letter proposes two types of energy-efficient and low-complexity schemes for uplink cognitive cellular networks. In the considered system, both cognitive users (CUs) and primary user (PU) share the same base station (BS). Under an outage ...

Wireless sensor networks (WSNs) are used to obtain information from the surrounding areas and collected data is reported to the base station through wireless links. In certain scenarios ongoing transmissions within the network need to be concealed so ...

We present a low-complexity algorithm based on reactive tabu search (RTS) for near maximum likelihood (ML) detection in large-MIMO systems. The conventional RTS algorithm achieves near-ML performance for 4-QAM in large-MIMO systems. But its performance ...

In this letter, a novel timing offset estimation method is presented for orthogonal frequency division multiplexing (OFDM) systems. The proposed method is developed on the basis of the cyclic structure of OFDM symbol and uses a new noise subspace based ...

The Long Term Evolution (LTE) system adopts Discontinuous Reception (DRX) in the link level for power saving to extend the battery life of the User Equipment (UE). A novel real-time DRX-aware scheduling method is proposed for delay-sensitive services in ...

Frequency switched transmit diversity (FSTD) is a simple diversity technique which can be easily combined with existing multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) schemes to support an increased number of ...

This letter proposes a resource allocation scheme to mitigate the effect of sensing errors in cognitive radio networks. When a spectrum sensor misses primary signals, the secondary transmission can be interfered with by the primary transmission, whereas ...

In this letter, we model a cognitive radio network as an interference market where each primary user (PU) and secondary user (SU) are price-taking interference offerers and purchasers, respectively. We consider stochastic interference demands of SUs and ...

In this paper, we focus on the well-known drawback of per user unitary beamforming rate control (PU²RC) that sum throughput severely degrades with a small number of users due to the mismatch between the actual link quality and channel feedback of users. ...

This letter studies power control for a two-hop interference channel. An innovative solution based on mixed strategy game theory is proposed to enable the users to transmit probabilistically. This creates orthogonal transmission opportunities and thus ...

This letter proposes a beamforming technique for weighted sum-rate (WSR) maximization in multiple-input single-output (MISO) interference channels. In order to solve the WSR maximization problem in a distributed manner, we obtain a decoupled problem by ...

IEEE 802.16m is now under consideration by the ITU to become the IMT-Advanced standard. However, handover authentication is a critical issue in this area. In this letter, we propose a fast handover authentication mechanism based on ticket for IEEE ...

In this paper, we analyze the Shannon capacity of the opportunistic relaying technique in amplify-and-forward cooperative systems over Rayleigh fading channels under outdated channel information. Closed-form expressions are derived for the average ...

In this letter, we consider the deployment of distributed space-time trellis codes (STTCs) for user cooperation. We derive a pairwise error probability (PEP) expression for distributed STTCs over cascaded Rayleigh fading channels. Using the derived PEP ...

In this letter, an improved selection cooperation (ISC) scheme for decode-and-forward relaying is proposed based on selection cooperation (SC) strategy. Assuming that channels suffer from independent non-identical Rayleigh fading, we derive closed-form ...

This letter provides a new outlook at the Gamma distribution and its involvement in the performance analysis of digital communications over wireless fading channels. Whereas the Gamma distribution is usually regarded as a two-parameter distribution with ...

In this letter, a novel decode-and-forward (DF) strategy for the two-way relay over Rayleigh fading channels is presented and analyzed. By encoding the two messages jointly at the relay node, the proposed scheme (termed DF-JM) can effectively handle ...

In amplify-and-forward (AF) based multisource multi-relay cooperative networks, system diversity will be restricted by the channels of the forwarding hop in the absence of direct source-destination links in Rayleigh fading. In this letter, we dedicate ...

The progressive edge-growth algorithm is a well-known procedure to construct regular and irregular low-density parity-check codes. In this paper, we propose a modification of the original algorithm that improves the performance of these codes in the ...

This study modifies the wrap-around Viterbi algorithm (WAVA) for tailbiting convolutional codes (TBCCs). The proposed modification is based on the fact that it is unnecessary to decode a codeword of TBCCs from the beginning of the codeword. WAVA must ...

This letter discusses the problem of direction of departure (DOD) and direction of arrival (DOA) estimation for multi-input multi-output (MIMO) radar, and derives a reduced-dimension multiple signal classification (MUSIC) algorithm therein. The proposed ...

An efficient combined maximum likelihood (ML) and decision feedback equalization (DFE) decoding method is proposed for a coded double space-time block code orthogonal frequency division multiplexing (DSTBC-OFDM) system. For the missing bit log ...

In this letter, we propose an efficient low complexity receiver for the preamble detection in single-carrier frequency division multiple access (SC-FDMA) systems with an antenna array. The proposed low complexity receiver is derived using a digital ...

The rapid increase of distributed denial-of-service (DDoS) attacks, which deplete a link bandwidth and service resource by sending a tremendous flooding of traffic to a victim server, has threatened fundamental network service stability. First, this ...

Wave-mixing Optical Cross-Connects (WM-OXCs) reduce complexity by using bulk wavelength converters (BWCs) to simultaneously convert multiple distinct wavelength channels. This letter investigates the complexity of WM-OXCs under two BWCs sharing schemes, ...

Collecting statistics from client requests, the broadcast server partitions data items into hot and cold-item sets to perform a hybrid broadcast scheduling. Hot items are broadcast periodically with periods based on their access probabilities. Cold ...