Dissemination in Communication Networks Laboratory

Jiazhuang, China

Dissemination in Communication Networks Laboratory

Jiazhuang, China
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Wang Z.,Harbin Institute of Technology | Wang Z.,Dissemination in Communication Networks Laboratory | Mei L.,Harbin Institute of Technology | Wang X.,Harbin Institute of Technology | Zhang N.,Harbin Institute of Technology
IET Communications | Year: 2017

Generalised frequency division multiplexing (GFDM) as a non-orthogonal waveform candidate is posed to reduce the high out of band radiation of orthogonal frequency division multiplexing system via pulse shaping. In this study, an analytical model of introduced interference from neighbouring subcarriers caused by pulse shaping is firstly proposed. Signal-to-interference-plus-noise ratio (SINR) is calculated according to related GFDM models with different weighted-type fractional Fourier transform (WFRFT) precoding orders. Approximated bit error rate (BER) expressions are derived for the low complexity GFDM system over additive white Gaussian noise and fading channels based on the analysis of SINR. Particularly, the BER superiority of WFRFT precoding is highlighted over the fading channels. Furthermore, peak-to-average power ratio and out of band power suppression performances are simulated at different WFRFT orders to illustrate the advantages of WFRFT precoding. © The Institution of Engineering and Technology.


Zhang J.,Beijing University of Posts and Telecommunications | Li Y.,Beijing University of Posts and Telecommunications | Niu K.,Beijing University of Posts and Telecommunications | Niu K.,Dissemination in Communication Networks Laboratory
Proceedings of 2016 5th International Conference on Network Infrastructure and Digital Content, IEEE IC-NIDC 2016 | Year: 2017

Generalized Frequency Division Multiplexing (GFDM) is a promising solution for the cellular system of the fifth generation (5G) PHY layer because its flexibility can address the different application requirements. However, due to the pulse shaping, there is inherent interference existing in the received signal, which has a negative impact on pilot-based channel estimation. Although the interference on the pilot symbols can be eliminated at the transmitter by using precoding matrices, the accompanied transmitting power penalty increases with the non-orthogonality of subcarriers and subsymbols. In our work, we propose an iterative method for interference cancellation at the receiver, which can efficiently mitigate the effect of neighboring symbols on pilots without transmitting power penalty. In addition, to improve the accuracy of channel estimation, we adopt the compressive sensing (CS) technology. Simulation results show that our proposed channel estimation algorithm is efficient even when the interference is severe, and by using orthogonal match pursuit (OMP) recovery algorithm, the performance of our algorithm can be close to the Cramer-Rao bound (CRB). © 2016 IEEE.


Guo J.,Beijing University of Posts and Telecommunications | Guo J.,Dissemination in Communication Networks Laboratory | Niu K.,Beijing University of Posts and Telecommunications | Niu K.,Dissemination in Communication Networks Laboratory | And 2 more authors.
Proceedings of 2016 5th International Conference on Network Infrastructure and Digital Content, IEEE IC-NIDC 2016 | Year: 2017

In this paper, we study an iterative beamforming scheme for downlink multiuser channels. The sum-rate of the system can be maximized by weighted sum-rate maximization method. However, the interference of leakage signal is not considered in this method. We propose a new metric named leakage sum-rate (LSR) to treat leakage interference. Then, the leakage sum-rate maximization is modeled by the power budget constraint of base stations. The optimization problem can be transformed to an equivalent weighted mean-square error minimization (WMMSE) problem and an iterative algorithm is proposed to solve it. In the algorithm, weighted factors, transmit and receive beamformers are updated iteratively. The proposed algorithm outperforms the SLNR maximizing algorithm in terms of the system sum-rate. Compared with the weighted sum-rate maximization scheme, the proposed algorithm can converge to a stationary point more quickly although the system performance is lower. Simulation results illustrate that the algorithm can make a good balance between system performance and complexity. © 2016 IEEE.


Han W.,National University of Defense Technology | Wang S.,National University of Defense Technology | Wang S.,Dissemination in Communication Networks Laboratory | Yang B.,National University of Defense Technology
Proceedings of 2016 IEEE International Conference on Integrated Circuits and Microsystems, ICICM 2016 | Year: 2016

This paper presents an automatic gain control (AGC) algorithm and circuit used in wireless communication receivers with high peak power to average power ratio (PAPR) signal. Combining fixed gain amplifier and programmable attenuator, the AGC function can be implemented by comparing the strength of thresholds with reading two points power detection value of radio frequency (RF) signal. The proposed method can well solve the gain jitter problem in the gain control procedure, implement gain control for each frame of input signal, and shut off the input signal channel if the SNR of input signal is small. © 2016 IEEE.


Su N.,Xidian University | Wang K.,Xidian University | Yu X.,Xidian University | Gu H.,Xidian University | And 2 more authors.
IEICE Electronics Express | Year: 2017

Scheduling algorithm is crucial to the performance of the Network- on-chip router. Different from traditional scheduling algorithms that concentrate on local fairness, we propose a congestion-aware scheduling algorithm based on input buffer of downstream router. The scheduling algorithm keeps a match dynamically between input and output by detecting the flits number to be transferred in the same packet. It can reduce network congestion especially under heavy traffic loads. Compared to RRM and iSLIP algorithm, the new scheduling algorithm can increase the saturation throughput by 8.2% and reduce the average communication latency by 7.8% under non-uniform traffic. © IEICE 2017.


Wang B.,Beijing Jiaotong University | Tao D.,Beijing Jiaotong University | Lin Z.,Beijing University of Posts and Telecommunications | Lin Z.,Dissemination in Communication Networks Laboratory | Lin Z.,China Mobile
2016 IEEE International Conference on Consumer Electronics-Taiwan, ICCE-TW 2016 | Year: 2016

In this paper, we integrate Hadoop onto IaaS cloud platform and propose a new Dynamic Hadoop Cluster on IaaS (DHCI) architecture. In DHCI architecture, three key modules are designed, they are monitoring module, virtual machine management module and scheduling module. The load information of both physical hosts and virtual machines are collected by the monitoring module, and can be used for designing a load feedback based resource scheduling algorithm. The basic idea of the solution is to dynamically balance the load of physical hosts and virtual machines by differentiated service. Simulation results show that our solution can balance workload and improve system performance. © 2016 IEEE.


Bai Y.-B.,Beihang University | Bai Y.-B.,Dissemination in Communication Networks Laboratory | Zhu X.,Beihang University | Shao X.,Institute for Infocomm Research | Yang W.-T.,Beihang University
Mobile Networks and Applications | Year: 2012

Mobile Ad Hoc Networks (MANETs) have inherently dynamic topologies and heterogeneous network environments. Due to the distributed, multi-hop nature of these networks, as well as limited network resource, wireless capacity and random mobility of nodes, Quality of Service (QoS) provisioning faces severe challenges, especially in multicast scenarios. Resource admission control is one of the most effective methods for resource utilization and QoS guaranteed. In this paper, we combine resource admission control technologies and intelligent methods, propose a fuzzy decision-based resource admission control mechanism for MANETs (FAST), which can fast respond to dynamic topology changes and unstable link status. FAST also supports multicast and destination heterogeneity. Users can choose multiple evaluation parameters with different weights of services in fuzzy decision. Simulation results have proved the efficiency of the mechanism. © Springer Science+Business Media, LLC 2012.


Wang J.,China Electronics Technology Group Corporation | Wang J.,Dissemination in Communication Networks Laboratory | He Z.,China Electronics Technology Group Corporation | Xu Z.,Unit 96275
WIT Transactions on Information and Communication Technologies | Year: 2014

In order to improve the jamming identification performance in fading channels, a cooperative jamming identification algorithm was proposed in this paper. The jamming signal was detected and identified in each node, and then the identification information was sent to the selected center node. The identification information was amalgamated at the center node. Simulation results show that the proposed cooperative jamming identification can improve the detection probability and the miss probability. © 2014 WIT Press.


Feng T.,University of Electronic Science and Technology of China | Zhang X.,University of Electronic Science and Technology of China | Tang W.,University of Electronic Science and Technology of China | Wang J.,University of Electronic Science and Technology of China | Guo Y.,Dissemination in Communication Networks Laboratory
2014 Australasian Telecommunication Networks and Applications Conference, ATNAC 2014 | Year: 2015

Cooperative relaying technology has been proved to be one of the most promising techniques to improve the throughput of CR networks. In this paper, cognitive relay networks with amplify-and-forward (AF) protocol in a spectrumsharing scenario have been considered. Compared with previous studies, we further consider the transmit power constraint on secondary source node (SS). Namely, we impose both transmit power constraint and interference power constraint on SS and secondary relay node (SR). As well we obtain the exact outage probability which works as the performance measurement of CR networks. To analyze the influential factors for system performance, the closed form expression of outage probability needs to be derived. However, it is mathematical intractable. Hence, an approximate approach is adopted as a solution. Finally, Monte-Carlo simulations are conducted to verify the accuracy of our approximation, the error sources of our analytical results are discussed as well. © 2014 IEEE.


Sun Z.,Harbin Engineering University | Sun Z.,Dissemination in Communication Networks Laboratory | Ning X.,Harbin Engineering University | Hu J.,Harbin Engineering University | Wang X.,Harbin Engineering University
2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering, MEIC 2014 | Year: 2014

In order to increase bandwidth efficiency of band limited communication system, a new multi-band digital modulation scheme based on Quaternary Carrier Orthogonal Sinusoidal Non-linear Chirp Keying (QCO-SNCK) is proposed. Firstly, by analyzing the orthogonality of SNCK modulated waveform samples, 4 mutually orthogonal waveform samples are selected as a set of new orthogonal subcarriers. Secondly, by using coherent demodulation method in the receiver, the quaternary wireless digital communication system has been achieved. Then the MATLAB software simulation platform is built to analysis the performance of the QCO-SNCK system. Theoretical and simulation results show that: when the communication channel bandwidth is limited, the bandwidth efficiency of QCO-SNCK system is 2 times wider than that of SNCK. Compared with Quadrature Phase Shift Keying (QPSK), the bandwidth efficiency of QCO-SNCK system has adjustable performance and higher flexibility. In addition, QCO-SNCK system has a strong ability of resisting Doppler frequency shift (DFS) which can be applied to wireless communication system with high rate mobile communication terminals. © 2014. The authors - Published by Atlantis Press.

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