# IEEE Communications Letters

## Issue 12 • Dec. 2017

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## Filter Results

Displaying Results 1 - 25 of 57

Publication Year: 2017, Page(s):C1 - 2549
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• ### IEEE Communications Society

Publication Year: 2017, Page(s): C2
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• ### Blind Detection With Polar Codes

Publication Year: 2017, Page(s):2550 - 2553
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In blind detection, a set of candidates has to be decoded within a strict time constraint, to identify which transmissions are directed at the user equipment. We propose a blind detection scheme based on polar codes, where the radio network temporary identifier is transmitted instead of some of the frozen bits. A low-complexity decoding phase decodes all candidates, selecting a subset that is deco... View full abstract»

• ### A Rigorous Revisit to the Partial Distortion Theorem in the Case of a Laplacian Source

Publication Year: 2017, Page(s):2554 - 2557
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This letter studies rigorously the partial distortion theorem in the case of a Laplacian probability density function and proves that, while essentially each cell of a minimum mean-square error nonuniform scalar quantizer contributes to distortion more or less the same as its neighbor, each outer cell contributes slightly more than its inner neighbor. Also it is proved that the outermost cell dist... View full abstract»

• ### Constructions of LDPCs From Elliptic Curves Over Finite Fields

Publication Year: 2017, Page(s):2558 - 2561
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In this letter, a new framework for the construction of low density parity check codes is exposed. Parameters of the new codes are estimated, performance simulations are reported and compared with some classical constructions. View full abstract»

• ### An Enhanced Probabilistic Computation Method for the Weight Distribution of Polar Codes

Publication Year: 2017, Page(s):2562 - 2565
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Owning to the explicit structure, Hamming weight distribution (HWD) of polar codes with large length can be recursively computed with that of the short one. In this letter, an enhanced probabilistic computation method is proposed to estimate the HWD of polar codes. Only the uniform distribution assumption for the 1 s in the codeword is used and the exhaustively searched HWD for very short polar co... View full abstract»

• ### A Reused-Public-Path Successive Cancellation List Decoding for Polar Codes With CRC

Publication Year: 2017, Page(s):2566 - 2569
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Since the decoding of polar codes goes wrong in sometime, several decoding methods have been proposed to overcome this issue. Unfortunately, the several schemes are still suffering from high decoding complexity. To this end, we propose a reused-public-path successive-cancellation list decoder, which can re-do the decoding from ${E}$ View full abstract»

• ### Design of Protograph-Based LDPC Codes with Limited Decoding Complexity

Publication Year: 2017, Page(s):2570 - 2573
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In this letter, we present a design method to find good protograph-based low-density parity-check codes with the numbers of nonzero elements in the parity-check matrix and decoding iterations both strictly limited. We utilize the protograph-based extrinsic information transfer (PEXIT) analysis to evaluate the error performance and employ the differential evolution algorithm to devise a well-perfor... View full abstract»

• ### Bounding Gallager’s Expurgated Bound

Publication Year: 2017, Page(s):2574 - 2577
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A modification of the Lovász theta function, called $vartheta (rho )$ , was introduced for the purpose of studying error exponents for codes over discrete memoryless channels by Dalai. It was mentioned that this function allows one to upper bound the multi-letter version of Gallager’s expurgated ... View full abstract»

• ### Clipping Can Improve the Performance of Spatially Coupled Sparse Superposition Codes

Publication Year: 2017, Page(s):2578 - 2581
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Gaussian signaling of spatially coupled sparse superposition codes incurs a high peak-to-average-power ratio (PAPR) problem. Clipping can be used to reduce PAPR. At the receiver side, generalized approximate message passing algorithm is employed to handle the non-linear clipping distortion. Surprisingly, we observe empirically that clipping can improve the performance in low-to-medium rate region.... View full abstract»

• ### Flow Aggregation Mechanism for Flow-Aware Multi-Topology Adaptive Routing

Publication Year: 2017, Page(s):2582 - 2585
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Today, the notion of treating the network traffic as flows is popular. The analyzed flow-based architectures are focused on access networks, because for the core, there is simply too many flows to efficiently deal with. Therefore, an important aspect of flow-based networking is flow aggregation. We show that it is possible and profitable to use aggregates of flows in flow-aware multi-topology adap... View full abstract»

• ### Joint Time-Frequency Alignment for PAPR and OOBE Suppression of OFDM-Based Waveforms

Publication Year: 2017, Page(s):2586 - 2589
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Orthogonal frequency division multiplexing (OFDM) waveform has been adopted by many wireless standards due to its numerous advantages. However, OFDM symbols have two critical drawbacks: high out-of-band emission (OOBE) and high peak-to-average power ratio (PAPR). Cyclic prefix (CP) alignment is one of the promising methods that jointly suppresses the OOBE and PAPR of OFDM symbols without introduci... View full abstract»

• ### Soft-Decision Decoding of Permutation Block Codes in AWGN and Rayleigh Fading Channels

Publication Year: 2017, Page(s):2590 - 2593
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We introduce an efficient soft-decision decoder for permutation block codes when assuming AWGN and slow fading frequency-nonselective channels. The decoder implements a combination of the Hungarian algorithm and Murty’s algorithm for the $k$ th assignment. Results show that the proposed algorithm achieves better coding ... View full abstract»

• ### A Tight Bound on BER of MCIK-OFDM With Greedy Detection and Imperfect CSI

Publication Year: 2017, Page(s):2594 - 2597
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This letter first investigates bit error rate (BER) of Multi-Carrier Index Keying–Orthogonal Frequency Division Multiplexing using a low-complexity greedy detector (GD). We derive a tight, closed-form expression for the BER of the GD in the presence of channel state information (CSI) uncertainty. Particularly, exploiting the fact that the GD detects the active indices first, and then detect... View full abstract»

• ### Hybrid Carrier Order Selection Scheme Based on Minimum Mean Square Error Equalization

Publication Year: 2017, Page(s):2598 - 2601
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In this letter, the relationship between the transformation order and the interference power in the hybrid carrier (HC) system is analyzed. The transformation order does not affect the total interference power but influences the distribution of the interference power. Furthermore, the more uniform the interference power distribution is, the better performance HC system can achieve. Then, an optima... View full abstract»

• ### Blind Detection for SPAD-Based Underwater VLC System Under P–G Mixed Noise Model

Publication Year: 2017, Page(s):2602 - 2605
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There is Poisson slot noise generated by the single photon avalanche diode (SPAD) and Gaussian thermal noise generated by the transimpedance amplifier, respectively, if an analog SPAD detector is applied in the visible light communication (VLC) system. In this letter, for the long distance SPAD-based underwater VLC system, a fast blind multiple-symbol detection (MSD) algorithm is developed under t... View full abstract»

• ### Physical-Layer Security Against Known/Chosen Plaintext Attacks for OFDM-Based VLC System

Publication Year: 2017, Page(s):2606 - 2609
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This letter introduces a chaos-based physical-layer security approach for an orthogonal frequency division multiplexing (OFDM)-based visible light communication (VLC) system with the capability against known-plaintext attacks (KPAs) and chosen-plaintext attacks (CPAs). This approach generates dynamic cyphertexts by exploiting the random characteristics of chaotic keys and input data. It performs c... View full abstract»

• ### Robust Energy Efficiency Optimization for Secure MIMO SWIPT Systems With Non-Linear EH Model

Publication Year: 2017, Page(s):2610 - 2613
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In this letter, we investigate the energy efficiency optimization for simultaneous wireless information and power transfer in multiple-input-multiple-output wiretapping systems, which consist of one transmitter, multiple desired receivers (DRs), and multiple eavesdroppers. Specifically, considering non-linear energy harvesting model, we aim to maximize the ratio of the total harvested power at the... View full abstract»

• ### Efficient 3-D Positioning Using Time-Delay and AOA Measurements in MIMO Radar Systems

Publication Year: 2017, Page(s):2614 - 2617
Cited by:  Papers (1)
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This letter investigates the problem of 3-D target localization in multiple-input multiple-output radars with distributed antennas, using hybrid time-delay and angle of arrival measurements. We propose a closed-form positioning method based on weighted least squares estimation. The proposed estimator is shown theoretically to achieve the Cramer-Rao lower bound under mild noise conditions. Numerica... View full abstract»

• ### High Accuracy Doppler Processing With Low Complexity in OFDM-Based RadCom Systems

Publication Year: 2017, Page(s):2618 - 2621
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Due to its suitability to combine the radar and communication (RadCom) applications simultaneously, the integrated RadCom systems using orthogonal frequency division multiplexing (OFDM) signals have been widely investigated. However, the Doppler processing strategy in traditional OFDM radars exhibits low accuracy along with high complexity caused by the communication data bits conveyed on the OFDM... View full abstract»

• ### Effective Block Sparse Representation Algorithm for DOA Estimation With Unknown Mutual Coupling

Publication Year: 2017, Page(s):2622 - 2625
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Unknown mutual coupling effect can degrade the performance of a direction of arrival estimation method. In this letter, a new method is proposed for uniform linear arrays (ULAs) to tackle this problem. Considering the sparse representation exploiting the inherent structure of the received data, the effective block sparse representation and the convex optimization problem are constructed using the ... View full abstract»

• ### A Distributed 1-bit Compressed Sensing Algorithm for Nonlinear Sensors With a Cramer–Rao Bound

Publication Year: 2017, Page(s):2626 - 2629
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A distributed 1-bit compressed sensing (CS) algorithm in a wireless sensor network with nonlinear sensors is proposed. In the context of 1-bit CS, the diffusion cooperation scheme is used with distributed implementation. Toward that end, a traditional steepest-descent solution is considered to minimize the appropriate global and local convex cost functions. Hence, a common parameter vector is opti... View full abstract»

• ### Direct Localization of Multiple Stationary Narrowband Sources Based on Angle and Doppler

Publication Year: 2017, Page(s):2630 - 2633
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Direct position determination (DPD) is a single-step method that directly localizes transmitters from sensor outputs without estimating intermediate parameters. With a moving array, DPDs are usually performed by implicitly using only angle information. This letter proposes a DPD algorithm for multiple stationary transmitters by exploiting location information embedded in angles and Doppler shifts.... View full abstract»

• ### An Open Loop With Kalman Filter for Intermittent GNSS Signal Tracking

Publication Year: 2017, Page(s):2634 - 2637
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Intermittent tracking technique can be used in the global navigation satellite system (GNSS) receiver to reduce its power consumption. To the pedestrian and vehicle navigation in the urban areas, an open loop with the Kalman filter for the GNSS signal intermittent tracking is proposed and its tracking accuracy relationship with the duty cycle is analyzed. Simulation and experiment results show tha... View full abstract»

• ### Joint Optimization of Analog Beam and User Scheduling for Millimeter Wave Communications

Publication Year: 2017, Page(s):2638 - 2641
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Millimeter wave (mmWave) technology is a promising candidate for future wireless communication systems to provide gigabit data rates to meet the stringent quality of service requirements of multimedia applications. Analog beam selection and user scheduling are two key problems for realizing multiuser mmWave communication in practical systems. We focus on the joint optimization of analog beam selec... 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