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# IEEE Communications Letters

## Filter Results

Displaying Results 1 - 25 of 66

Publication Year: 2017, Page(s):C1 - 966
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• ### IEEE Communications Society

Publication Year: 2017, Page(s): C2
| PDF (70 KB)
• ### Mean-Field Dynamics of Inter-Switching Memes Competing Over Multiplex Social Networks

Publication Year: 2017, Page(s):967 - 970
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This letter characterizes the intertwined behavior of a susceptible-infected-susceptible epidemic model involving multiple mutually exclusive memes, each competing over distinct contact planes of an undirected multi-layer social network, with the possibility of inter-switching. Based on the mean-field theory, we contrast and derive closed-form analytical expressions for the steady-state thresholds... View full abstract»

• ### Ciphertext-Only Attack on Linear Feedback Shift Register-Based Esmaeili-Gulliver Cryptosystem

Publication Year: 2017, Page(s):971 - 974
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Esmaeili and Gulliver recently proposed a secret key cryptosystem based on error-correcting codes in which a codeword modified by random insertions, deletions, and errors is used as a ciphertext. The secret keys used in this cryptosystem consist of random numbers generated by synchronized random number generators that are implemented using two distinct linear feedback shift registers (LFSRs) in ea... View full abstract»

• ### Simple Hybrid ARQ Schemes Based on Systematic Polar Codes for IoT Applications

Publication Year: 2017, Page(s):975 - 978
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Hybrid ARQ (H-ARQ) schemes enable wireless reliability with high transmission efficiency, which is demanded for battery-operated low-complexity applications, such as Internet of Things. We propose two schemes to enable type-II H-ARQ based on systematic polar codes. We introduce code inversion for polar codes to recover the message from the redundant bits only. The first scheme we propose is an H-A... View full abstract»

• ### Multi-Bit Flipping Decoding of LDPC Codes for NAND Storage Systems

Publication Year: 2017, Page(s):979 - 982
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This letter presents a new multi-bit flipping decoding algorithm for low-density parity-check codes, which can enhance hard-information-based decoding performance for NAND storage systems. Since the conventional enhancement techniques developed for bit-flipping decoding require soft information, the long latency taken to generate the soft information, makes it hard to apply them to practical NAND ... View full abstract»

• ### Off-the-Grid Compressive Time Delay Estimation via Manifold-Based Optimization

Publication Year: 2017, Page(s):983 - 986
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The time delay estimation (TDE) of some known waveforms from sampled data is of great interest in the area of signal processing, e.g., wireless communication, radar, and sonar. Classical algorithms, such as matched filters, multiple signal classification always work under the Nyquist sampling rate determined by the bandwidth of the waveform. With the assumption of sparsity, the novel compressive s... View full abstract»

• ### Compressed FEC Codes With Spatial-Coupling

Publication Year: 2017, Page(s):987 - 990
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An error floor problem is observed for a spatially coupled sparse-regression (SCSR) code with limited sparsity in low-to-medium rates. This letter presents a scheme that also involves spatial-coupling and compressed-sensing (SCCS) similar to SCSR. We replace position modulation in SCSR by a general concatenated forward error control code. We introduce a chaining principle that improves the error f... View full abstract»

• ### Hybrid Precoding via Successive Refinement for Millimeter Wave MIMO Communication Systems

Publication Year: 2017, Page(s):991 - 994
| | PDF (330 KB)

We propose a hybrid precoding design for spatial multiplexing in millimeter wave massive multiple-input multiple-output systems. The proposed design relies on the popular orthogonal matching pursuit (OMP) algorithm. The OMP algorithm uses necessary columns of the right/left (for receiver/transmitter) unitary matrix of the channel (obtained via a singular value decomposition) to obtain the initial ... View full abstract»

• ### A Bit-to-Symbol Mapping Scheme for Spatial Modulation With Partial Channel State Information

Publication Year: 2017, Page(s):995 - 998
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This letter presents a bit to symbol mapping scheme for spatial modulation multiple input single output systems. The proposed scheme relies on the transmitter knowledge of partial information about the channel’s magnitude and the phase for each transmit antenna. The aim of the proposed mapping is to minimize the hamming distance between adjacent symbols, which consequently, reduces the aver... View full abstract»

• ### Capacity Analysis of FBMC-OQAM Systems

Publication Year: 2017, Page(s):999 - 1002
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This letter presents a capacity analysis of filter bank multicarrier offset quadrature amplitude modulation (FBMC-OQAM) systems. In FBMC-OQAM receivers, it is common to preserve the real part of the demodulated signal samples for information recovery. The imaginary part of these samples, which are called intrinsic interference, is simply ignored. This letter provides a theoretical answer to the fo... View full abstract»

• ### Linear Diversity Combining on Correlated and Unequal Power Nakagami-0.5 Fading Channels

Publication Year: 2017, Page(s):1003 - 1006
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Closed-form or analytical solutions for the outage probability and average probability of symbol error are derived for correlated (and independent), unequal power dual branch Nakagami-0.5 linear diversity combining schemes. A novel analytical solution for the probability density function of the sum of two correlated, dissimilar Nakagami-0.5 random variables is derived. View full abstract»

• ### 1-Bit Quantization and Oversampling at the Receiver: Communication Over Bandlimited Channels With Noise

Publication Year: 2017, Page(s):1007 - 1010
| | PDF (550 KB) | HTML

A bandlimited additive white Gaussian noise channel is considered where the output is 1-bit quantized and oversampled with respect to the Nyquist rate. We consider root raised cosine filters at the transmitter and receiver. In particular, we focus on a roll-off factor equal to 1 and 0. Because of the oversampling the channel has infinite memory. An auxiliary channel law is proposed which describes... View full abstract»

• ### Fast Packet Classification Based on Hybrid Cutting

Publication Year: 2017, Page(s):1011 - 1014
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Most existing packet classification algorithms adopt only one cutting strategy. However, the proposed algorithm adopts a hybrid one that combines equi-sized cuttings with pivot-based cuttings, so it can significantly increase cutting efficiency. Therefore, it can have distinct features, such as smaller table size, larger supportable rule set, and higher classification performance compared with the... View full abstract»

• ### MIMO Sphere Decoding With Successive Interference Cancellation for Two-Dimensional Non-Uniform Constellations

Publication Year: 2017, Page(s):1015 - 1018
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Non-uniform constellations (NUCs) have been introduced to improve the performance of quadrature amplitude modulation constellations. 1D-NUCs keep the squared shape, while 2D-NUCs break that constraint to provide robustness. An impending problem with multiple-input multiple-output (MIMO) is the optimum demapping complexity, which grows exponentially with the number of antennas and the constellation... View full abstract»

• ### On the Optimal Tone Spacing for Interference Mitigation in OFDM-IM Systems

Publication Year: 2017, Page(s):1019 - 1022
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Orthogonal frequency division multiplexing with index modulation (OFDM-IM) has been recently proposed as an efficient technique to improve the error performance and enhance the spectral efficiency achieved by the classical OFDM. In this letter, we minimize the presence of intercarrier and intersymbol interference, experienced by OFDM-IM systems under mobility conditions and multipath scenarios, by... View full abstract»

• ### Closed-Form BER Expressions for HSV-Based ${M}$ PSK-CSK Systems

Publication Year: 2017, Page(s):1023 - 1026
Cited by:  Papers (1)
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The analysis of hybrid phase shift keying-color shift keying ( ${M}$ PSK-CSK) systems under the additive white Gaussian noise model is presented. ${M}$ PSK-CSK systems are formed by mapping phase shift keying symbols to color shift keying using hue-saturati... View full abstract»

• ### Edge Popularity Prediction Based on Social-Driven Propagation Dynamics

Publication Year: 2017, Page(s):1027 - 1030
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Caching contents in edge networks can reduce latency and lighten the burden on backhaul links. Since the capacity of cache nodes is limited, accurate content popularity distribution is crucial to the effectual usage of cache capacity. However, existing popularity prediction models stem from big data and, hence, may suffer poor accuracy due to the small population in edge caching. In this letter, w... View full abstract»

• ### Enabling Backoff for SCM Wake-Up Radio: Protocol and Modeling

Publication Year: 2017, Page(s):1031 - 1034
| | PDF (828 KB)

In sub-carrier modulation (SCM) wake-up radio (WuR) enabled wireless sensor networks, a node can initiate data transmission at any instant of time. In this letter, we propose to activate a backoff procedure before sending wake-up calls (WuCs) in order to avoid potential collisions among WuCs. Consequently, no backoff is needed for the main radio after a WuC is received. A discrete-time Markov chai... View full abstract»

• ### A Mobile Channel Model for VLC and Application to Adaptive System Design

Publication Year: 2017, Page(s):1035 - 1038
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In this letter, we propose a realistic channel model for visible light communication (VLC) assuming a mobile user. Based on non-sequential ray tracing, we first obtain channel impulse responses for each point over the user movement trajectories, and then express path loss and delay spread as a function of distance through curve fitting. Our results demonstrate large variations in received power. I... View full abstract»

• ### Blind Interference Alignment for Multiuser MISO Indoor Visible Light Communications

Publication Year: 2017, Page(s):1039 - 1042
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A filter-pair-based blind interference alignment scheme is proposed to improve the achievable degree of freedom (DoF) in multiuser multiple-input single-output indoor visible light communications. In the proposed scheme, the transmitter does not need to know channel state information. Different transmit sub-channels employ different pulse-shaping filters, and each user is equipped with multiple re... View full abstract»

• ### Joint Dimming and Communication Design for Visible Light Communication

Publication Year: 2017, Page(s):1043 - 1046
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Multi-pulse position modulation (M-PPM) is advantageous in a visible light communication system due to its overall satisfactory performance in spectrum efficiency and dimming control. In this letter, we consider the joint dimming and communication design with M-PPM. We provide a model for the dimming control and address the balance between the dimming loss minimization and the transmission rate ma... View full abstract»

• ### OpenFlow-Based Scalable Routing With Hybrid Addressing in Data Center Networks

Publication Year: 2017, Page(s):1047 - 1050
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In this letter, we propose an OpenFlow (OF)-based SCAlable Routing strategy (OSCAR) for modular data center networks (DCN) using a hybrid addressing mechanism. Each module in the DCN constitutes a segment in the network. Inter-segment routing is performed using virtual MAC (VMAC) ids assigned to the segments and intra-segment routing is done using IP addresses. OF provides central control over the... View full abstract»

• ### Blind Estimation of the HPA Operating Point in Multicarrier Satellite Transponders

Publication Year: 2017, Page(s):1051 - 1054
| | PDF (420 KB) | HTML

Satellite operators need to know the operating point of a transponder to provide a good transmission quality. Especially in satellite networks with many small carriers in one transponder, the estimation is challenging because of gain compression, capture effects or unknown attenuation in the transmission channel. We propose a blind estimator based on signal statistics to overcome these problems. T... View full abstract»

• ### Security Analysis of LTE/SAE Networks Under De-synchronization Attack for Hyper-Erlang Distributed Residence Time

Publication Year: 2017, Page(s):1055 - 1058
| | PDF (343 KB) | HTML

In this letter, we analyze the security of a long term evolution/system architecture evolution-based network in the presence of de-synchronization attack. For a random mobile user, with the mobility management entity residence time distributed as a Hyper-Erlang random variable, we derive closed form expressions for the distribution of key exposure time, expected volume of exposed packets, and expe... 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