Peer-to-peer communication has been recently considered as a popular issue for local area services. An innovative resource allocation scheme is proposed to improve the performance of mobile peer-to-peer, i.e., device-to-device (D2D), communications an underlay in downlink (DL) cellular networks. To optimize system sum rate over sharing both D2D and modes, we introduce reverse iterative combinatorial auction mechanism. In auction, all spectrum resources are set units, which bidders compete...

In this paper, we investigate joint relay and jammer selection in two-way cooperative networks, consisting of two sources, a number intermediate nodes, one eavesdropper, with the constraints physical-layer security. Specifically, proposed algorithms select or three nodes to enhance security against malicious eavesdropper. The first selected node operates conventional mode assists sources deliver their data corresponding destinations using an amplify-and-forward protocol. second third are...

Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is a recently developed transmission technique that extends the principle of spatial to OFDM subcarriers. In this paper, performance OFDM-IM studied in terms achievable rate assuming an M-ary constellation and channel state information available at receiver. A closed-form lower bound derived, based on which interleaved grouping method proposed for use comparison existing method, one can better benefit from diversity...

In this paper, we consider a two-way relay system where the two sources can only communicate through an untrusted intermediate and investigate physical layer security issue in scenario. Specifically, regard as eavesdropper from which information transmitted by needs to be kept confidential, despite fact that its cooperation relaying is essential. We first indicate nonzero secrecy rate indeed achievable even without help of external friendly jammers. As for with jammers, after further...

Spatial modulation (SM) is a newly emerging multiple-input-multiple-output technique that activates only single antenna for transmission at any time instant and uses the index of active as an additional information-carrying mechanism. However, by its nature, SM decoding coherent in channel state information (CSI) required receiver. In fact, can be very complex due to heavily entangled estimation symbol detection. this correspondence, differential scheme completely bypasses CSI transmitter or...

In this paper, we propose a new regular-shaped geometry-based stochastic model (RS-GBSM) for non-isotropic scattering wideband multiple-input multiple-output vehicle-to-vehicle (V2V) Ricean fading channels. By correcting the unrealistic assumption widely used in current RS-GBSMs, proposed can more practically study impact of vehicular traffic density on channel statistics different time delays. From model, derive Doppler power spectral (PSD) and find that highly dynamic spectrum appears V2V...

The full duplex (FD) technique, which allows the communication node to transmit and receive signals over same frequency band simultaneously, has potential double spectral efficiency in comparison with traditional half (HD) technique. However, self-interference, leaking from FD node's transmission its own reception, detrimental impact on performance of communication. In this paper, we analyze optimize two-way relay system using amplify-and-forward protocol, when multi-relay scenario is...

Device-to-device (D2D) communications underlaying cellular networks have recently been considered as a promising means to improve the resource utilization of network and user throughput between devices in proximity each other. In this paper, we investigate sharing problem optimize system performance such scenario. Specifically, formulate interference relationships among different D2D communication links novel interference-aware graph, propose an graph based algorithm that can effectively...

In this letter, we introduce information-guided channel-hopping, a new scheme for high data rate communication over Rayleigh fading channel using multiple transmit antennas. This is proposed based on the fact that independence character of multi-channel can be used as an additional information transmitting channel, and maximum likelihood decoding achieved in simple way by decoupling signals conveyed different methods. The analysis results prove capacity behavior better than space-time block...

An innovative resource allocation scheme is proposed to improve the performance of device-to-device (D2D) communications as an underlay in downlink (DL) cellular networks. To optimize system sum rate over sharing both D2D and modes, we introduce a sequential second price auction mechanism. In auction, all spectrum resources are considered set units, which auctioned off by groups pairs sequence. We first formulate value each unit for pair, basis auction. And then detailed algorithm explained...

In this paper, a novel unified channel model framework is proposed for cooperative multiple-input multiple-output (MIMO) wireless channels. The generic and adaptable to multiple MIMO scenarios by simply adjusting key parameters. Based on the using typical communication environment as an example, we derive geometry-based stochastic (GBSM) applicable propagation scenarios. GBSM first that has ability investigate impact of local scattering density (LSD) characteristics. From derived GBSM,...

At the time of writing, vehicle-to-vehicle (V2V) communication is enjoying substantial research attention as a benefit its compelling applications. However, ever-increasing tele-traffic expected to result in overcrowding available band. As first resort, multiple input output (MIMO) can be utilized enhance attainable bandwidth efficiency or link reliability. hostile V2V wireless propagation environments, achievable multiple-antenna gain eroded by channel correlation. promising MIMO technique,...

An innovative auction-based allocation scheme is proposed to improve the performance of device-to-device (D2D) communications as an underlay in downlink (DL) cellular networks. To optimize system sum rate over resource sharing both D2D and modes, we introduce a reverse iterative combinatorial auction mechanism. In auction, all spectrum resources are considered set units, which compete obtain business bidders while packages pairs auctioned off goods each round. We first formulate valuation...

Device-to-device (D2D) communications underlaying cellular networks have been recently considered as a promising means to enhance resource utilization of the network and local user throughput among devices in proximity each other. In this paper, we investigate joint block assignment transmit power allocation problem optimize performance such scenario. Specifically, model interference relationships different D2D communication links novel graph with unique attributes propose corresponding...

A solution to the power leakage minimization problem in discrete Fourier transform (DFT) based communication systems is presented. In a conventional DFT system, modulated subcarriers exhibit high sidelobe levels, which leads significant out-of-band leakage. Existing techniques found literature either do not achieve sufficient suppression or suffer from spectral efficiency loss. Precoding can be seen as general linear processing method for reduction, however, how design optimal precoder still...

This paper investigates the resource-sharing problem in vehicular networks, including both vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication links. A novel underlaying mode for networks is proposed, which different V2V V2I links are permitted to access same resources their individual data transmission. To solve we, first time, apply graph theory propose following two interference graph-based schemes: 1) interference-aware scheme 2) interference-classified scheme....

In this paper, we propose a novel centralized time-division multiple access (TDMA)-based scheduling protocol for practical vehicular networks based on new weight-factor-based scheduler. A roadside unit (RSU), as controller, collects the channel state information and individual of communication links within its coverage, it calculates their respective weight factors, which decisions are made by RSU. Our proposed factor mainly consists three parts, i.e., quality factor, speed category factor....

Driven by both safety concerns and commercial interests, vehicular ad hoc networks (VANETs) have recently received considerable attentions.In this paper, we address popular content distribution (PCD) in VANETs, which one large file is downloaded from a stationary roadside unit (RSU), group of on-board units (OBUs) driving through an area interest (AoI) along highway.Due to high speeds vehicles deep fadings vehicle-to-roadside (V2R) channels, some the may not finish downloading entire but...

Data dissemination is a promising application for the vehicular network. Existing data schemes are generally built upon some random-access protocol, which results in unavoidable collision problem. To address this problem, paper we design novel strategy from scheduling perspective. A framework then proposed. In proposed framework, main challenge how best to assign transmission opportunity nodes with maximum utility and avoid We propose practical relay selection adopt space-time network coding...

Highlights Polyimide-based flexible microneedle array (PI-MNA) electrodes realize high electrical/mechanical performance and are compatible with wearable wireless recording systems. The normalized electrode–skin interface impedance (EII) of the PI-MNA reaches 0.98 kΩ cm 2 at 1 kHz 1.50 10 Hz, approximately 1/250 clinical standard electrodes. This is first report on study applied to long-term continuous monitoring for polysomnography. Abstract Microneedle (MNA) an effective solution achieve...

In this correspondence, we propose an analog network coding scheme with differential modulation (ANC-DM) using amplify-and-forward protocol for bidirectional relay networks when neither the source nodes nor knows channel state information (CSI). The performance of proposed ANC-DM is analyzed and a simple asymptotic bit error rate (BER) expression derived. analytical results are verified through simulations. It shown that BER about 3 dB away from coherent detection scheme. To improve system...

Recently, cardiovascular disease (CVD) has become one of the leading death causes worldwide, and it contributes to 41% all deaths each year in China. This incurs a cost more than 400 billion US dollars China on healthcare expenditures lost productivity during past ten years. It been shown that CVD can be effectively prevented by an interdisciplinary approach leverages technology development both IT electrocardiogram (ECG) fields. In this paper, we present WE-CARE , intelligent telecardiology...

For simulations of multiple-input multiple-output (MIMO) vehicle-to-vehicle (V2V) Rayleigh fading channels under more realistic non-isotropic scattering scenarios, we propose a new parameter computation method for the design sum-of-sinusoids (SoS) simulation models. Compared with existing relevant methods, proposed has same efficiency but provides better approximation to desired statistical properties theoretical reference model.

In this paper, we investigate the resource sharing problem to optimize system performance in device-to-device (D2D) communications underlaying cellular networks from a distributed and cooperative perspective. Specifically, formulate coalitional game with transferable utility, which each user intends maximize its own utility has incentive cooperate other users form strengthened group that can increase opportunity win preferred spectrum resources. Furthermore, propose merge-and-split based...

The hybrid relay selection (HRS) scheme, which adaptively chooses amplify-and-forward (AF) and decode-and-forward (DF) protocols, is very effective to achieve robust performance in wireless networks. This paper analyzes the frame error rate (FER) of HRS scheme general cooperative networks without with utilizing control coding at source node. We first develop an improved signal-to-noise ratio (SNR) threshold-based FER approximation model. Then, we derive analytical average expression as well...