# IEEE Communications Letters

## Filter Results

Displaying Results 1 - 25 of 58

Publication Year: 2017, Page(s):C1 - 2
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• ### IEEE Communications Society

Publication Year: 2017, Page(s): C2
| PDF (90 KB)
• ### Reviewers and Editors Appreciation 2016

Publication Year: 2017, Page(s): 3
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• ### Compressive Sensing-Based Pilot Design for Sparse Channel Estimation in OFDM Systems

Publication Year: 2017, Page(s):4 - 7
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We consider the deterministic pilot design problem for sparse channel estimation in an Orthogonal Frequency Division Multiplexing (OFDM) system. Our design is based on minimizing the coherence measure of the Fourier submatrix associated with the pilot subcarriers. This is done by optimizing over both pilot locations and pilot powers. As finding such global minimizer is a combinatorial problem, we ... View full abstract»

• ### Probability of Outage Due to Self-Interference in Indoor Wireless Environments

Publication Year: 2017, Page(s):8 - 11
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In this letter, we derive a mathematically tractable expression for the outage probability in the presence of self-interference over indoor wireless environments modeled through the recently proposed joint fading and two-path shadowing channel model. The effect of self-interference is studied under two different conditions encountered in single-frequency network architectures: 1) long propagation ... View full abstract»

• ### Round-Trip Energy Efficiency of Wireless Energy Powered Massive MIMO System With Latency Constraint

Publication Year: 2017, Page(s):12 - 15
Cited by:  Papers (1)
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We consider a massive MIMO system with frequency-division duplex, where a base station (BS) transfers energy to multiple users in the downlink and the users simultaneously transmit information to the BS in the uplink using the harvested energy. The objective of this letter is to optimize the round-trip energy efficiency (EE) by transmit power allocation at the BS while guaranteeing the delay outag... View full abstract»

• ### Innovative Robust Modulation Classification Using Graph-Based Cyclic-Spectrum Analysis

Publication Year: 2017, Page(s):16 - 19
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A novel automatic modulation classification method based on the graph presentation of the cyclic spectrum is proposed. In our proposed scheme, the periodicity and the symmetry of the cyclic spectrum will be exploited to establish a concise feature representation of multiple graphs. The modulated signal is first transformed from the cycle-frequency domain into the graph domain. Consequently, the co... View full abstract»

• ### Novel Robust Band-Limited Signal Detection Approach Using Graphs

Publication Year: 2017, Page(s):20 - 23
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In this letter, a novel graph-based adequate and concise information representation paradigm is explored. This new signal representation framework can provide a promising alternative for manifesting the essential structure of the communication signals. A typical application, namely, band-limited signal detection, can thus be carried out using our proposed new graph-based signal characterization. A... View full abstract»

• ### Symbol-Based Belief Propagation Decoder for Multilevel Polar Coded Modulation

Publication Year: 2017, Page(s):24 - 27
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In this letter, symbol-based belief propagation decoder is proposed for multilevel polar coded modulation (MLPCM) scheme. Unlike the traditional multi-stage detection (MSD) strategy by decoding polar codes level by level after demapping, we directly calculate the probabilities of symbols and do demapping after the symbol decoding process so as to decrease the decoding delay and improve the perform... View full abstract»

• ### Low-Complexity Belief-Propagation Decoding via Dynamic Silent-Variable-Node-Free Scheduling

Publication Year: 2017, Page(s):28 - 31
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This letter presents a low-complexity scheduling scheme, referred to as the dynamic silent-variable-node-free scheduling (D-SVNFS) scheme, for the sequential belief propagation decoding of LDPC code. The D-SVNFS regulates the dynamic propagation of message updates based on the check-to-variable message residuals. To determine the next message update, it computes the on-demand message residuals and... View full abstract»

• ### Informed Fixed Scheduling for Faster Convergence of Shuffled Belief-Propagation Decoding

Publication Year: 2017, Page(s):32 - 35
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A novel informed fixed scheduling (IFS) scheme for shuffled belief-propagation (BP) decoding of binary low-density parity-check (LDPC) code is introduced to improve the BP decoding convergence. The IFS finds an appropriate order of variable nodes in accordance with the number of updated neighbors in the code graph, ensuring that the maximum number of latest message updates is utilized within a sin... View full abstract»

• ### Analysis of the Probability of Sync-Words in Reed–Solomon Codes

Publication Year: 2017, Page(s):36 - 39
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Given binary data transmission encoded using a Reed-Solomon (RS) code and employing binary sync-words (markers) for synchronization, we calculate the probability of finding the sync-word in the codewords of the RS code as PS. We give analytical expressions for calculating PS, which is applicable to RS codes. Knowledge of PS can be used to calculate the probability of finding ... View full abstract»

• ### Analysis of the Spatial Correlation of Indoor MIMO PLC Channels

Publication Year: 2017, Page(s):40 - 43
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In this letter, an analysis of the spatial correlation of multiple-input multiple-output (MIMO) power line communications (PLC) channels in the frequency range 1-80 MHz is provided, where the term spatial correlation refers to the relation between the paths that form the MIMO channel matrix. The study is based on a large set of 2×2 MIMO channels measured in four different countries. The pre... View full abstract»

• ### Analytical Performance Evaluation of VDSL2

Publication Year: 2017, Page(s):44 - 47
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In this letter, we model the downstream bit rate per user for VDSL2-based access systems as normal random variable. Its statistics are expressed in closed analytic forms explicitly accounting for FEXT fluctuation and for the access network geometry. The considered approximation is obtained assuming log-normal statistics for the signal-to-interference plus noise ratio per sub-carrier. The validity ... View full abstract»

• ### Mutually Referenced Channel Shortening

Publication Year: 2017, Page(s):48 - 51
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This letter proposes a blind channel shortening method for inter-block interference (IBI) suppression in orthogonal frequency division multiplexing (OFDM) systems. In a receiver, there are two OFDM demodulators each with a time-domain equalizer (TEQ) and a frequency-domain equalizer (FEQ). The TEQ parameters are determined such that the outputs of an FEQ are identical to those of another FEQ. It i... View full abstract»

• ### Delay Minimization in Real-Time Communications With Joint Buffering and Coding

Publication Year: 2017, Page(s):52 - 55
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We present a closed-form expression for the minimal delay that is achievable in a setting that combines a buffer and an erasure code, used to mitigate the packet delay variance. The erasure code is modeled according to the recent information-theoretic results on finite block length codes. Evaluations reveal that accurate knowledge of the network parameters is essential for optimal operation. Moreo... View full abstract»

• ### Expanded Constellation Mapping for Enhanced Far-End-Cross-Talk Cancellation in G.fast

Publication Year: 2017, Page(s):56 - 59
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We propose the novel concept of expanded constellation mapping (ECM) for maximising the received signal power, while cancelling the far-end-cross-talk in copper-based wireline communications. The goal of ECM is to beneficially map the transmitted symbol vector to its expanded constellation set by carefully exploiting the copper channels' specific characteristics. To elaborate, ECM is comprised of ... View full abstract»

• ### Design of an Adaptive Multiresolution $M$ -Ary DCSK System

Publication Year: 2017, Page(s):60 - 63
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Multiresolution M-ary differential chaos shift keying (MR-M-DCSK) system enables unequal-priority transmission via exploiting non-uniformly spaced phase constellations. In this letter, an adaptive MR-M-DCSK system is proposed by using a new constellation parameter design. Aiming at maximizing the spectral efficiency, the constellation parameter is carefully selected based on signal-to-noise ratio,... View full abstract»

• ### Modulation Classification via Subspace Detection in MIMO Systems

Publication Year: 2017, Page(s):64 - 67
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The problem of efficient modulation classification (MC) in multiple-input multiple-output systems is considered. Per-layer likelihood-based MC is proposed by employing subspace decomposition to partially decouple the transmitted streams. When detecting the modulation type of the stream of interest, a dense constellation is assumed on all remaining streams. The proposed classifier outperforms exist... View full abstract»

• ### FSK-Based Reactive Jammer Piggybacking

Publication Year: 2017, Page(s):68 - 71
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The complexity and sophistication of communications jamming will continue to increase over time. The traditional approach to jammer mitigation is to harden radios, often sacrificing communications performance for more advanced jamming protection. To provide an escape from this trend, we propose a jammer exploitation strategy in which the communications system causes an enemy reactive jammer to act... View full abstract»

• ### Security of an Ordered-Based Distributive Jamming Scheme

Publication Year: 2017, Page(s):72 - 75
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This letter proposes a new efficient yet simple distributed ordered-based jamming scheme for securing a legitimate transmission and powering a wireless receiver equipped with a nonlinear energy harvester. A legitimate source node (Alice) communicates with one legitimate receive node (Bob) and one legitimate radio-frequency energy-harvesting node (Dana) in the presence of an eavesdropping node (Eve... View full abstract»

• ### Simplified High-Order DOA and Range Estimation With Linear Antenna Array

Publication Year: 2017, Page(s):76 - 79
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In this letter, we propose a new efficient method to estimate the direction-of-arrival (DOA) and range of near-field sources in a decoupled way. First, a non-Hermitian cumulant matrix is constructed, whose eigenvectors associated with zero eigenvalues are used to directly estimate the DOA by using the MUSIC algorithm. Then, the ranges are estimated with the estimated DOA by orthogonalizing the rem... View full abstract»

• ### An Efficient Semidefinite Relaxation Algorithm for Moving Source Localization Using TDOA and FDOA Measurements

Publication Year: 2017, Page(s):80 - 83
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In this letter, we address the moving source localization problem by using time-difference-of-arrival and frequency-difference-of-arrival measurements. The localization problem is first reformulated based on the robust least squares criterion and then perform semidefinite relaxation (SDR) to obtain a convex semidefinite programming problem, which can be solved efficiently via optimization toolbox.... View full abstract»

• ### Coordinated Beamforming for Multi-Cell MIMO-NOMA

Publication Year: 2017, Page(s):84 - 87
Cited by:  Papers (1)
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In this letter, two novel coordinated beamforming techniques are developed to enhance the performance of non-orthogonal multiple access combined with multiple-input multiple-output communication in the presence of inter-cell interference. The proposed schemes successfully deal with inter-cell interference, and increase the cell-edge users' throughput, which in turn improves user fairness. In addit... View full abstract»

• ### Low Complexity Message Passing-Based Receiver Design for Wiener Phase-Noise Channels

Publication Year: 2017, Page(s):88 - 91
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This letter concerns low complexity receiver design for Wiener phase-noise channels, where the variance of the additive white Gaussian noise (AWGN) is unknown. By representing the system with a factor graph, both the variational message passing and the sum-product message passing are used to achieve efficient joint decoding, phase noise estimation, and AWGN precision (the reciprocal of AWGN varian... 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