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# IEEE Transactions on Communications

## Filter Results

Displaying Results 1 - 25 of 41

Publication Year: 2014, Page(s):C1 - C4
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• ### IEEE Transactions on Communications publication information

Publication Year: 2014, Page(s): C2
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• ### On the Optimum Cyclic Subcode Chains of ${\cal RM}(2, m)^{\ast}$ for Increasing Message Length

Publication Year: 2014, Page(s):2145 - 2155
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The distance profiles of linear block codes can be employed to design variational coding scheme for encoding message with variational length and getting lower decoding error probability by large minimum Hamming distance, where one example is in the design of transport format combination indicators (TFCIs) in CDMA. Considering convenience for encoding, we focus on the distance profiles with respect... View full abstract»

• ### Using Short Synchronous WOM Codes to Make WOM Codes Decodable

Publication Year: 2014, Page(s):2156 - 2169
Cited by:  Papers (2)
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In the framework of write-once memory (WOM) codes, it is important to distinguish between codes that can be decoded directly and those that require the decoder to know the current generation so as to successfully decode the state of the memory. A widely used approach to constructing WOM codes is to design first nondecodable codes that approach the boundaries of the capacity region and then make th... View full abstract»

• ### Minimum Pseudoweight Analysis of 3-Dimensional Turbo Codes

Publication Year: 2014, Page(s):2170 - 2182
Cited by:  Papers (2)
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In this paper, we consider pseudocodewords of (relaxed) linear programming (LP) decoding of 3-dimensional turbo codes (3D-TCs). We present a relaxed LP decoder for 3D-TCs, adapting the relaxed LP decoder for conventional turbo codes proposed by Feldman in his thesis. We show that the 3D-TC polytope is proper and C-symmetric and make a connection to finite graph covers of the 3D-TC factor graph. Th... View full abstract»

• ### Hybrid Interweave-Underlay Spectrum Access for Cognitive Cooperative Radio Networks

Publication Year: 2014, Page(s):2183 - 2197
Cited by:  Papers (8)
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In this paper, we study a hybrid interweave-underlay spectrum access system that integrates amplify-and-forward relaying. In hybrid spectrum access, the secondary users flexibly switch between interweave and underlay schemes based on the state of the primary users. A continuous-time Markov chain is proposed to model and analyze the spectrum access mechanism of this hybrid cognitive cooperative rad... View full abstract»

• ### Performance Analysis of Adaptive Modulation in Cognitive Relay Network With Cooperative Spectrum Sensing

Publication Year: 2014, Page(s):2198 - 2211
Cited by:  Papers (6)
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In practice, sensing results often affect the data transmission in cognitive radio systems. Therefore, a hybrid interweave/underlay cognitive radio system is presented by jointly considering spectrum sensing and data transmission. In particular, multiple relays are deployed for both the spectrum sensing and data transmission. The secondary user (SU) source and the relays cooperatively sense the sp... View full abstract»

• ### Downlink Beamforming in Underlay Cognitive Cellular Networks

Publication Year: 2014, Page(s):2212 - 2223
Cited by:  Papers (5)
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We propose a novel scheme for downlink beamforming design in an underlay cognitive cellular system. The beamforming design is formulated as an optimization problem with the objective of keeping the cognitive base station transmit power as well as the induced interference on the primary users, below predefined system thresholds. This is subject to providing a certain level of signal-to-interference... View full abstract»

• ### Resource Allocation in MIMO-OFDM-Based Cooperative Cognitive Radio Networks

Publication Year: 2014, Page(s):2224 - 2235
Cited by:  Papers (6)
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We consider a MIMO-OFDM-based cooperative cognitive radio network (CCRN) in which there exists a number of regenerative relays to cooperate with the cognitive base station (CBS) in serving an SU. Our objective is to optimize the transmit covariance matrices at the CBS and the relays and obtain the optimal subcarrier pairing, relay assignment, where the dual-decomposition technique is recruited as ... View full abstract»

• ### Design and Analysis of Low-Complexity Multi-Antenna Relaying for OFDM-Based Relay Networks

Publication Year: 2014, Page(s):2236 - 2248
Cited by:  Papers (3)
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A class of low-complexity multi-antenna relaying schemes is proposed for orthogonal frequency division multiplexing based one-way and two-way relay networks. In the proposed schemes, two single-antenna terminal nodes complete the data transfer in two time phases via a multi-antenna amplify-and-forward relay without channel state information, discrete Fourier transform (DFT), and inverse DFT. The r... View full abstract»

• ### Auction-Based Relay Power Allocation: Pareto Optimality, Fairness, and Convergence

Publication Year: 2014, Page(s):2249 - 2259
Cited by:  Papers (7)
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It is well known that a cooperative communication technique can offer significant energy saving improvements. In particular, the efficient relay resource allocation makes energy saving practically appealing. In this work, we propose an auction-based relay power allocation scheme over multi-user relay networks from the energy-efficient perspective. In particular, during the relay resource allocatio... View full abstract»

• ### MSE and Outage Probability Based Training Power Allocations for Relay Networks

Publication Year: 2014, Page(s):2260 - 2270
Cited by:  Papers (1)
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For a multi-relay amplify-and-forward (AF) network, we investigate the power allocation problem during the channel training process for the destination to estimate the global channel state information (CSI) of the whole network. We consider two objective functions: the total mean-square-error (MSE) of all channel estimates and the end-to-end outage probability (OP) of the network under channel est... View full abstract»

• ### I/Q Imbalance in Two-Way AF Relaying

Publication Year: 2014, Page(s):2271 - 2285
Cited by:  Papers (17)
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We analyze the performance of dual-hop two-way amplify-and-forward relaying in the presence of in-phase and quadrature-phase imbalance (IQI) at the relay node. In particular, two power allocation schemes, namely, fixed power allocation and instantaneous power allocation, are proposed to improve the system reliability and robustness against IQI under a total transmit power constraint. For each prop... View full abstract»

• ### A New Beamforming Design for MIMO AF Relaying Systems With Direct Link

Publication Year: 2014, Page(s):2286 - 2295
Cited by:  Papers (8)
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In this paper, we propose a new beamforming technique that maximizes the end-to-end signal-to-noise ratio (SNR) for amplify-and-forward multiple-input-multiple-output cooperative relaying systems with direct link between thesource and the destination. Instead of conventional schemes resorting to an iterative method, such as a gradient ascentalgorithm, our scheme provides a simple closed-form solut... View full abstract»

• ### On the Achievable Diversity of Repetition-Based and Relay Selection Network-Coded Cooperation

Publication Year: 2014, Page(s):2296 - 2313
Cited by:  Papers (8)
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In this paper, we provide a mathematical framework for the analysis, design, and optimization of network-coded cooperative diversity (NCCD) protocols. The analysis is applicable to relay-aided protocols based on the error propagation model, which rely on appropriately designed diversity-combining demodulators at the destination. Wireless networks with an arbitrary number of sources and relays are ... View full abstract»

• ### Ergodic Capacity Comparison of Different Relay Precoding Schemes in Dual-Hop AF Systems With Co-Channel Interference

Publication Year: 2014, Page(s):2314 - 2328
Cited by:  Papers (25)
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In this paper, we analyze the ergodic capacity of a dual-hop amplify-and-forward relaying system, where the relay is equipped with multiple antennas and subject to co-channel interference and the additive white Gaussian noise. Specifically, we consider three heuristic precoding schemes, where the relay first applies the: 1) maximal-ratio combining (MRC); 2) zero-forcing (ZF); and 3) minimum mean-s... View full abstract»

• ### Filter-And-Forward Relay Design for MIMO-OFDM Systems

Publication Year: 2014, Page(s):2329 - 2339
Cited by:  Papers (1)
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In this paper, the filter-and-forward (FF) relay design for multiple-input-multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems is investigated. Due to the considered MIMO structure, the FF relay design is investigated in the framework of joint design together with the linear MIMO transceiver. As the design criterion, first, the minimization of weighted sum mean square ... View full abstract»

• ### Diversity–Multiplexing Tradeoff of Asynchronous Decode-and-Forward Cooperative Networks

Publication Year: 2014, Page(s):2340 - 2352
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The diversity-multiplexing tradeoff (DMT) of a general two-hop asynchronous cooperative network is examined for orthogonal and nonorthogonal selection decode-and-forward relaying protocols. The transmitter nodes send pulse amplitude modulation signals, in which information symbols are linearly modulated by a shaping waveform to be sent to the destination. We consider two different cases of band-li... View full abstract»

• ### Energy-Efficient Uplink Resource Allocation in LTE Networks With M2M/H2H Co-Existence Under Statistical QoS Guarantees

Publication Year: 2014, Page(s):2353 - 2365
Cited by:  Papers (39)
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Recently, energy efficiency in wireless networks has become an important objective. Aside from the growing proliferation of smartphones and other high-end devices in conventional human-to-human (H2H) communication, the introduction of machine-to-machine (M2M) communication or machine-type communication into cellular networks is another contributing factor. In this paper, we investigate quality-of-... View full abstract»

• ### Resource Allocation in Spectrum-Sharing OFDMA Femtocells With Heterogeneous Services

Publication Year: 2014, Page(s):2366 - 2377
Cited by:  Papers (127)
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Femtocells are being considered a promising technique to improve the capacity and coverage for indoor wireless users. However, the cross-tier interference in the spectrum-sharing deployment of femtocells can degrade the system performance seriously. The resource allocation problem in both the uplink and the downlink for two-tier networks comprising spectrum-sharing femtocells and macrocells is inv... View full abstract»

• ### An Extension of Clarke's Model With Stochastic Amplitude Flip Processes

Publication Year: 2014, Page(s):2378 - 2389
Cited by:  Papers (1)
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Stochastic modeling is an essential tool for studying statistical properties of wireless channels. In multipath fading channel (MFC) models, the signal reception is modeled by a sum of wave path contributions, and Clarke's model is an important example of such which has been widely accepted in many wireless applications. However, since Clarke's model is temporally deterministic, Feng and Field not... View full abstract»

• ### Characterizing the Spectral Properties and Time Variation of the In-Vehicle Wireless Communication Channel

Publication Year: 2014, Page(s):2390 - 2399
Cited by:  Papers (8)
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To deploy effective communication systems in vehicle cavities, it is critical to understand the time variation of the in-vehicle channel. Initially, rapid channel variation is addressed, which is characterized in the frequency domain as a Doppler spread. It is then shown that, for typical Doppler spreads, the in-vehicle channel is underspread, and therefore, the information capacity approaches the... View full abstract»

• ### A Semiblind Two-Way Training Method for Discriminatory Channel Estimation in MIMO Systems

Publication Year: 2014, Page(s):2400 - 2410
Cited by:  Papers (10)
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Discriminatory channel estimation (DCE) is a recently developed strategy to enlarge the performance difference between a legitimate receiver (LR) and an unauthorized receiver (UR) in a multiple-input multiple-output (MIMO) wireless system. Specifically, it makes use of properly designed training signals to degrade channel estimation at the UR, which in turn limits the UR's eavesdropping capability... View full abstract»

• ### Robust Distributed Beamforming With Interference Coordination in Downlink Cellular Networks

Publication Year: 2014, Page(s):2411 - 2421
Cited by:  Papers (8)
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This paper focuses on multicell coordinated beamforming in the presence of channel state information (CSI) errors, where base stations (BSs) collaboratively mitigate their intercell interference (ICI). Assuming that the CSI errors are hyper-spherically bounded, we consider an optimization problem that minimizes the overall transmission power of BSs subject to signal-to-interference-plus-noise-rati... View full abstract»

• ### Coded Sampling Bound—How Much Training is Needed for Iterative Semi-Blind Channel Estimation?

Publication Year: 2014, Page(s):2422 - 2431
Cited by:  Papers (1)
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Coherent detection is commonly facilitated by means of pilot-aided channel estimation. While this approach offers a high estimation accuracy, the spectral and power efficiencies are reduced due to the pilot overhead. In the case that redundancy due to channel coding is not used for the purpose of channel estimation, the maximum pilot spacing for which a time-varying channel can be reconstructed wi... 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