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IEEE Transactions on Communications

Issue 10 • Oct. 2017

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Displaying Results 1 - 25 of 42

Publication Year: 2017, Page(s):C1 - C4
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• IEEE Communications Society

Publication Year: 2017, Page(s): C2
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• Row-by-Row Coding Schemes for Inter-Cell Interference in Flash Memory

Publication Year: 2017, Page(s):4101 - 4113
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Inter-cell interference (ICI) is a significant cause of errors in flash memories. In single-level cell (SLC) flash memory, ICI arises when 1 0 1 patterns are programmed either in the horizontal or vertical directions. Since data pages are written sequentially in horizontal wordlines, one can mitigate the effects of horizontal ICI by applying conventional constrained codes that forbid the 1 0 1 pat... View full abstract»

• Inactivation Decoding of LT and Raptor Codes: Analysis and Code Design

Publication Year: 2017, Page(s):4114 - 4127
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In this paper, we analyze Luby transform (LT) and Raptor codes under inactivation decoding. A first-order analysis is introduced, which provides the expected number of inactivations for an LT code, as a function of the output distribution, the number of input symbols, and the decoding overhead. The analysis is then extended to the calculation of the distribution of the number of inactivations. In ... View full abstract»

• Simplified Symbol Flipping Algorithms for Nonbinary Low-Density Parity-Check Codes

Publication Year: 2017, Page(s):4128 - 4137
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Based on the symbol-flipping algorithm with multiple-votes (MV-SF), this paper presents two simplified algorithms, symbol flipping with truncated and multiple votes (T-MV-SF) and symbol flipping with simplified and multiple votes (S-MV-SF), for nonbinary low-density parity-check(NB-LDPC) codes. Unlike previous symbol-flipping based algorithms (SFBAs), the T(S)-MV-SF uses the truncated voting infor... View full abstract»

• Spectral and Energy Efficiency in Cognitive Radio Systems With Unslotted Primary Users and Sensing Uncertainty

Publication Year: 2017, Page(s):4138 - 4151
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This paper studies energy efficiency (EE) and average throughput maximization for cognitive radio systems in the presence of unslotted primary users. It is assumed that primary user activity follows an ON–OFF alternating renewal process. Secondary users first sense the channel possibly with errors in the form of miss detections and false alarms, and then, start the data transmission only if... View full abstract»

• Primary Channel Gain Estimation for Spectrum Sharing in Cognitive Radio Networks

Publication Year: 2017, Page(s):4152 - 4162
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In cognitive radio networks, the channel gain between primary transceivers, namely, primary channel gain, is crucial for a cognitive transmitter (CT) to control the transmit power and achieve spectrum sharing. Conventionally, the primary channel gain is estimated in the primary system, and thus unavailable at the CT. To deal with the issue, two estimators are proposed by enabling the CT to sense p... View full abstract»

• Impact of Non-Linear High-Power Amplifiers on Cooperative Relaying Systems

Publication Year: 2017, Page(s):4163 - 4175
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In this paper, we investigate the impact of the high-power amplifier non-linear distortion on multiple relay systems by introducing the soft envelope limiter, traveling wave tube amplifier, and solid-state power amplifier to the relays. The system employs amplify-and-forward either fixed or variable gain relaying and uses the opportunistic relay selection with outdated channel state information to... View full abstract»

• In-Network Compression for Multiterminal Cascade MIMO Systems

Publication Year: 2017, Page(s):4176 - 4187
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We study the problem of receive beamforming in uplink cascade multiple-input multiple-output (MIMO) systems as an instance of that of cascade multiterminal source coding for lossy function computation. Using this connection, we develop two coding schemes for the second and show that their application leads to beamforming schemes for the first. In the first coding scheme, each terminal in the casca... View full abstract»

• Scalable Source Transmission With Unequal Frequency Reuse in MIMO Cellular Networks

Publication Year: 2017, Page(s):4188 - 4204
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This paper studies the optimal frequency reuse for the transmission of multimedia scalable sources, such as embedded images or scalable video, which need unequal error protection or unequal transmission rates in the bitstream. First, we analyze the crossover of the outage probabilities for full and partial frequency reuse cases in terms of the data rate. We prove that we can find a crossover of th... View full abstract»

• Complexity Reduction for the Optimization of Linear Precoders Over Random MIMO Channels

Publication Year: 2017, Page(s):4205 - 4217
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Precoder optimization with full channel state information for finite alphabet signals over multiple-input multiple-output random channels is investigated in this paper. The precoder is represented by a product of power allocation matrix and constellation-forming matrix. There was an optimal algorithm introduced in the literature to globally maximize the channel mutual information by iteratively op... View full abstract»

• Impact of Mobility on the Uplink Sum Rate of MIMO-OFDMA Cellular Systems

Publication Year: 2017, Page(s):4218 - 4231
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With the fast development of vehicular technologies, the number of mobile terminals as well as their moving speeds has increased conspicuously, making it meaningful to re-examine the impact of mobility on communication performance of the existing cellular systems. In this paper, the uplink sum rate of a multiple-input multiple-output orthogonal frequency-division multiple access (MIMO-OFDMA) cellu... View full abstract»

• Achievable Rates in Uplink Massive MIMO Systems With Pilot Hopping

Publication Year: 2017, Page(s):4232 - 4246
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Massive MIMO promises large spectral and power efficiency gains. However, pilot contamination limits these aspired gains. In this paper, we propose a structured, i.e., non-random, pilot hopping and a weighted moving average channel estimation for time-varying massive MIMO systems. The proposed algorithm diversifies the contaminating (interfering) sources, such that all the users e... View full abstract»

• Multi-Objective Optimization for Distributed MIMO Networks

Publication Year: 2017, Page(s):4247 - 4259
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In this paper, we investigate the linear transceiver optimization for multiple-inputmultiple-output (MIMO) interference networks, where multiple pairs of multi-antenna source and destination nodes communicate simultaneously. Different from most of existing works, we jointly consider three critical issues of the linear transceiver optimization for MIMO interference networks based on multi-objective... View full abstract»

• Algebraic Differential Spatial Modulation Is Capable of Approaching the Performance of Its Coherent Counterpart

Publication Year: 2017, Page(s):4260 - 4273
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We show that certain signal constellations invoked for classic differential encoding result in a phenomenon we term as the unbounded differential constellation size (UDCS). Various existing differential transmission schemes that suffer from this issue are identified. Then, we propose an enhanced algebraic field extension-based differential spatial modulation (AFE-DSM) scheme and i... View full abstract»

• PAM Decomposition of Ternary CPM With Duobinary Encoding

Publication Year: 2017, Page(s):4274 - 4284
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In this paper, we investigate the pulse amplitude modulation (PAM) decomposition and the spectral efficiency of duobinary continuous phase modulation (CPM), where duo- binary CPM represents a ternary CPM whose symbols are generated using a duobinary encoder. We show that this precoder ensures a higher spectral efficiency compared with binary CPM and we propose a PAM decomposition characterized by ... View full abstract»

• Code-Shifted Differential Chaos Shift Keying With Code Index Modulation for High Data Rate Transmission

Publication Year: 2017, Page(s):4285 - 4294
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In the general code-shifted differential chaos shift keying (GCS-DCSK) system, multiple bit-streams are simultaneously carried by CS-DCSK signal using Walsh codes. However, its data rate is limited by the available Walsh codes in the Walsh code matrix due to orthogonality constraint of GCS-DCSK signal. In this paper, we propose a new GCS-DCSK scheme with code index modulation (CIM-CS-DCSK), which ... View full abstract»

• Enhancing the Physical Layer of Contention Resolution Diversity Slotted ALOHA

Publication Year: 2017, Page(s):4295 - 4308
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There is an urgent need for substantially enhancing random access schemes to be able to support native massive machine-to-machine communications in the next generation wireless systems. Lately, contention resolution diversity slotted ALOHA (CRDSA) and its variants have contributed to a drastic improvement in throughput compared with the traditional slotted ALOHA protocols. In this paper, we furthe... View full abstract»

• Learning-Based Content Caching and Sharing for Wireless Networks

Publication Year: 2017, Page(s):4309 - 4324
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Content caching at base stations (BSs) is a promising technique for future wireless networks by reducing network traffic and alleviating server bottleneck. However, in practice, the content popularity distribution may change with spatio-temporal variation but be unknown for BSs, which is an intractable obstacle for efficient caching strategy design. In this paper, considering unknown popularity di... View full abstract»

• Analysis of Multi-Server Queue With Spatial Generation and Location-Dependent Service Rate of Customers as a Cell Operation Model

Publication Year: 2017, Page(s):4325 - 4333
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A novel multi-server queue with heterogeneous customers is formulated and analyzed as the model of operation of a cell of a mobile communication network. We assume that the cell is divided into zones depending on signal quality. The type of a customer corresponds to a zone in which this customer is currently situated and the rate of the customer’s service depends on his/her type. During ser... View full abstract»

• Design and Analysis of a Hybrid Radio Frequency and Visible Light Communication System

Publication Year: 2017, Page(s):4334 - 4347
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In this paper, a hybrid radio frequency (RF) and visible light communication (VLC) system is considered. A hybrid system with multiple VLC access points (APs) and RF APs is designed and analyzed. In indoor environments, VLC APs provide very high data rates whilst proving illumination, and RF APs offer ubiquitous coverage with moderate data rates. Since VLC networks piggyback on existing lighting i... View full abstract»

• Secure Hybrid VLC-RF Systems With Light Energy Harvesting

Publication Year: 2017, Page(s):4348 - 4359
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In this paper, a hybrid visible light communication-radio frequency (RF) system, including a legitimate receiver (R) and an eavesdropper (E) is considered. R can harvest energy from the light emitted by light emitting diodes (LEDs), which is used for the information transmission between R and the RF receiver which is close to the LED. It is assumed that E tries to eavesdrop the information deliver... View full abstract»

• Location-Assisted Coding for FSO Communication

Publication Year: 2017, Page(s):4360 - 4370
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Recent years have witnessed an explosive growth in the number of wireless devices. This development has fueled much research in wireless access technologies to efficiently use radio frequency spectrum. On the other hand, recent advances in free space optical (FSO) technologies promise a complementary approach to increase wireless capacity. In this paper, we describe WiFO, a hybrid WiFi and FSO hig... View full abstract»

• DCO-OFDM Signals With Derated Power for Visible Light Communications Using an Optimized Adaptive Network-Based Fuzzy Inference System

Publication Year: 2017, Page(s):4371 - 4381
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Direct current-biased optical orthogonal frequency division multiplexing (DCO-OFDM) signals used in visible light communications suffer from high peak-to-average-power ratio (PAPR) or cubic metric (CM). It strongly degrades the performance due to the great back-off necessary to avoid the clipping effect in the light-emitting diode. Thus, PAPR and CM reduction techniques become crucial to improve t... View full abstract»

• Secrecy in MIMO Networks With No Eavesdropper CSIT

Publication Year: 2017, Page(s):4382 - 4391
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We consider two fundamental multi-user channel models: the multiple-input multiple-output (MIMO) wiretap channel with one helper (WTH) and the MIMO multiple access wiretap (MAC-WT) channel. In each case, the eavesdropper has $K$ antennas while the remaining terminals have $N$ View full abstract»

Aims & Scope

IEEE Transactions on Communications focuses on all telecommunications including telephone, telegraphy, facsimile, and point-to-point television by electromagnetic propagation.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Naofal Al-Dhahir
University of Texas at Dallas