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# IEEE Communications Letters

## Filter Results

Displaying Results 1 - 25 of 51

Publication Year: 2015, Page(s):C1 - 1278
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• ### IEEE Communications Letters publication information

Publication Year: 2015, Page(s): C2
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• ### Fast Decoding of the (47, 24, 11) Quadratic Residue Code Without Determining the Unknown Syndromes

Publication Year: 2015, Page(s):1279 - 1282
Cited by:  Papers (1)
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In this paper, a hard-decision (HD) scheme is presented to facilitate faster decoding of the (47, 24, 11) quadratic residue (QR) code. The new HD algorithm uses the previous scheme of decoding the (47, 24, 11) QR code up to three errors, but corrects four and five errors with new different methods. In the four-error case, the new algorithm directly determines the coefficients of the error-locator ... View full abstract»

• ### Improving the Belief-Propagation Convergence of Irregular LDPC Codes Using Column-Weight Based Scheduling

Publication Year: 2015, Page(s):1283 - 1286
Cited by:  Papers (7)
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In this letter, a novel scheduling scheme for decoding irregular low-density parity-check (LDPC) code, based on the column weight of variable nodes in the code graph, is introduced. In this scheme, the irregular LDPC code is decoded using the shuffled belief-propagation (BP) algorithm by selecting the variable nodes in descending order of their column weight. Via numerical simulation, it is shown ... View full abstract»

• ### Secure GDoF of $K$-User Gaussian Interference Channels: When Secrecy Incurs No Penalty

Publication Year: 2015, Page(s):1287 - 1290
Cited by:  Papers (3)
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Recently, Geng et al. have shown that from the perspective of generalized degrees of freedom (GDoF), power control and treating interference as noise (TIN) is optimal for a broad class of Gaussian interference channels. In this work, we show that for TIN-optimal interference channels identified by Geng et al., secrecy constraints on unintended messages incur no GDoF penalty, which leads us to a se... View full abstract»

• ### Index Codes for the Gaussian Broadcast Channel Using Quadrature Amplitude Modulation

Publication Year: 2015, Page(s):1291 - 1294
Cited by:  Papers (3)
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We propose index codes, based on multidimensional QAM constellations, for the Gaussian broadcast channel, where every receiver demands all the messages from the source. The efficiency with which an index code exploits receiver side information in this broadcast channel is characterised by a code design metric called side information gain. The known index codes for this broadcast channel enjoy larg... View full abstract»

• ### A Simple Asymptotic Bound on the Error of the Ordinary Normal Approximation to the Student's t-Distribution

Publication Year: 2015, Page(s):1295 - 1298
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A simple asymptotic bound on the error of the ordinary normal approximation (ONA) to the Student's t-distribution is derived. The proposed bound provides a quick calculation of the minimum number of degrees of freedom required to ensure a given approximation error. Then, the application of the ONA is investigated in confidence interval determination and detection theory. Finally, using the propose... View full abstract»

• ### On Fault Tolerance of the Gallager B Decoder Under Data-Dependent Gate Failures

Publication Year: 2015, Page(s):1299 - 1302
Cited by:  Papers (8)
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In this letter, we characterize the effect of data-dependent gate failures on the performance of the Gallager B decoder of low-density parity-check codes. We show that this type of failures makes the decoder dependent on a transmitted codeword, thus rendering inapplicable the traditional analysis tools such as density evolution and trapping sets. By using Monte Carlo simulations, we identify two o... View full abstract»

• ### ZCZ Aperiodic Complementary Sequence Sets With Low Column Sequence PMEPR

Publication Year: 2015, Page(s):1303 - 1306
Cited by:  Papers (2)
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In this letter, zero-correlation zone (ZCZ) aperiodic complementary sequence (ZACS) sets with low column sequence peak-to-mean envelope power ratio (PMEPR) are introduced. Based on Golay sequences with large zero autocorrelation zone and orthogonal matrix, a class of ZACS sets are constructed. When each sequence is arranged to be a matrix, the PMEPR of column sequence is at most 2. View full abstract»

• ### CLTCP: An Adaptive TCP Congestion Control Algorithm Based on Congestion Level

Publication Year: 2015, Page(s):1307 - 1310
Cited by:  Papers (1)
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The Transmission Control Protocol (TCP) has been profusely used by diverse applications such as FTP, email, and HTTP. In recent decades, numerous TCP variants have been developed to fit the fast increasing of network capacities and improve the performance of TCP algorithms in various scenarios, particularly in the high-bandwidth-delay-product (high-BDP) and lossy networks. Although the performance... View full abstract»

• ### A Novel Pre-Equalization Method for Molecular Communication via Diffusion in Nanonetworks

Publication Year: 2015, Page(s):1311 - 1314
Cited by:  Papers (6)
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In this letter, a novel pre-equalization method in the context of molecular communication via diffusion (MCvD) is proposed. Our method is based on the emission of two types of messenger molecules (MMs) from the transmitter in order to mitigate the high intersymbol interference (ISI), which critically hinders the performance of any MCvD system. In this approach, the difference between the number of... View full abstract»

• ### Aggregation Points Planning in Smart Grid Communication System

Publication Year: 2015, Page(s):1315 - 1318
Cited by:  Papers (5)
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Aggregation Point (AP) in neighborhood area network (NAN) plays a key role on smart grid communication. The AP stores and forwards data stream between home area network (HAN) and wide area network (WAN) in the smart grid. In this letter, we study how to plan the APs in the smart grid to minimize the total deployment cost of the opening APs and the connecting cost between the APs and the HANs while... View full abstract»

• ### Modulation/Coding Options for Coin Cell Battery Operated Transmitters

Publication Year: 2015, Page(s):1319 - 1322
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Wireless sensors have been used in many applications over the last decade. Size and power consumption remain the two principal challenges impeding their widespread use. To address both issues, batteries with smaller form factors such as coin cells can be deployed. The lifetime performance of linear modulation transmitters when deploying coin cell batteries has not been addressed previously. Here, ... View full abstract»

• ### Linear Precoding Design for Mutual Information Maximization in Generalized Spatial Modulation With Finite Alphabet Inputs

Publication Year: 2015, Page(s):1323 - 1326
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In this letter, we develop a new precoding scheme that improves the performance of mutual information for generalized spatial modulation (GSM). First, the closed-form expression of the mutual information of the GSM with finite alphabet inputs is derived in order to update the precoder with regard to the mutual information. The joint precoding design problem to maximize the mutual information of th... View full abstract»

• ### Optimization Model and Algorithm for Energy Efficient Virtual Node Embedding

Publication Year: 2015, Page(s):1327 - 1330
Cited by:  Papers (3)
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In the existing virtual network embedding algorithms, the minimization of energy consumption for mapping virtual nodes is ignored. By means of the optimization theory and the resource consolidation, we construct an optimization model for energy efficient virtual node embedding. The minimization of energy consumption is solved as the minimal product of energy cost per CPU and allocated CPU from vir... View full abstract»

• ### Single ODSB Radio-Over-Fiber Signal Supports STBC at Each RAP

Publication Year: 2015, Page(s):1331 - 1334
Cited by:  Papers (1)
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We propose and mathematically characterize a novel radio-over-fiber (ROF) downlink, where a radio access point (RAP) benefits from the transmit diversity gain of space-time block coding (STBC). Significantly, this transmit diversity is achieved using a single optical modulator in the base station (BS). In the proposed architecture, each RAP is fed with a single optical double-sideband signal, wher... View full abstract»

• ### A Reliable Approach for Modeling the Actual Antenna Pattern in Millimeter-Wave Communication

Publication Year: 2015, Page(s):1335 - 1338
Cited by:  Papers (2)
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This letter presents a mathematical framework for evaluating the link capacity of an interfered communication link in a millimeter-wave mobile scenario, accounting in detail for the shape of the antenna pattern and for the statistic of the direction of arrivals. The developed approach, whose accuracy is verified by Monte Carlo validations in 2D and 3D wireless environments, does not require simpli... View full abstract»

• ### Loop Resolution Mechanism for Flow-Aware Multi-Topology Adaptive Routing

Publication Year: 2015, Page(s):1339 - 1342
Cited by:  Papers (1)
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Flow-Aware Multi-Topology Adaptive Routing is a new proposal which provides multipath transmissions in the networks based on any IP routing protocol. However, due to utilization of flow tables which store flow forwarding information, it suffers from routing instability and the occurrence of failures. This problem is solved by the mechanism proposed in this letter. The mechanism is based on a Time-... View full abstract»

• ### A Novel Method To Extend Coherent Integration for Weak GPS Signal Acquisition

Publication Year: 2015, Page(s):1343 - 1346
Cited by:  Papers (2)
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In order to enhance the sensitivity of Global Positioning System receivers, increasing the coherent integration time in the acquisition process is necessary. This letter analyzes the limitation to coherent integration in acquisition algorithms due to the bit sign transition of navigation data and proposes a novel time parallel acquisition algorithm with transition detection (denoted as TPATD) to o... View full abstract»

• ### Secure Beamforming for SWIPT in Multiuser MISO Broadcast Channel With Confidential Messages

Publication Year: 2015, Page(s):1347 - 1350
Cited by:  Papers (9)
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In this letter, we consider simultaneous wireless information and power transfer (SWIPT) in multiuser multiple-input single-output (MISO) broadcast channel with confidential messages, where each receiver adopts the power splitting (PS) approach to decode information and harvest energy simultaneously. Our goal is to minimize the total transmit power while guaranteeing the secrecy rate and harvested... View full abstract»

• ### Secrecy Enhancement Analysis Against Unknown Eavesdropping in Spatial Modulation

Publication Year: 2015, Page(s):1351 - 1354
Cited by:  Papers (11)
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In multiple-input-multiple-output (MIMO) wireless communications, spatial modulation (SM) has recently emerged as a new transmission method. This letter explores the physical-layer security in typical SM systems. We present a secrecy rate analysis for multiple antenna destination and eavesdroppers receivers. Targeting against passive eavesdroppers in unknown locations, we study the efficacy of act... View full abstract»

• ### Improved Channel Estimation for MIMO Interference Cancellation

Publication Year: 2015, Page(s):1355 - 1357
Cited by:  Papers (1)
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In this letter, a jamming resilient communication technique for unmanned aircraft vehicle (UAV) is proposed. Multiple-input multiple-output (MIMO) interference cancellation is exploited to combat reactive jamming. An improved channel estimation algorithm based on Kalman filter and basis expansion model (BEM) is used to track the quick changes of the combined channel components. Simulation results ... View full abstract»

• ### A Modified Energy Detector for Random Signals in Gaussian Noise

Publication Year: 2015, Page(s):1358 - 1361
Cited by:  Papers (1)
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This letter proposes a new modified energy detector for random signals in Gaussian noise. This new detector, whose decision variable is the weighted sum of the signal amplitude and its square, has a simple structure similar to the conventional energy detector. We propose a parameter optimization method to find the proper weighting factor by maximizing the error exponent of the misdetection probabi... View full abstract»

• ### Capacity Bounds for Rayleigh/Lognormal MIMO Channels With Double-Sided Correlation

Publication Year: 2015, Page(s):1362 - 1365
Cited by:  Papers (1)
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In this letter, both analytic upper bound and lower bound of ergodic capacity are presented for distributed multiple-input multiple-output (D-MIMO) systems operating on Rayleigh/Lognormal fading channels. In the analysis, it is assumed that receive correlation and transmit correlation exist simultaneously, and the numbers of receive and transmit antennas both are arbitrary. The determinant in the ... View full abstract»

• ### Outage Analysis of Practical FSO/RF Hybrid System With Adaptive Combining

Publication Year: 2015, Page(s):1366 - 1369
Cited by:  Papers (7)
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Hybrid free-space optical (FSO)/radio-frequency (RF) systems have emerged as a promising solution for high-data-rate wireless transmission. We present and analyze a transmission scheme for the hybrid FSO/RF communication system based on adaptive combining. Specifically, only FSO link is active as long as the instantaneous signal-to-noise ratio (SNR) at the FSO receiver is above a certain threshold... View full abstract»

## Aims & Scope

IEEE Communications Letters publishes letters on the frontiers of research within the field of interest of the IEEE Communications Society in a timely manner.

Full Aims & Scope

Editor-in-Chief
Octavia Dobre