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2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)最新文献

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Resource allocation with beamforming technique for MDC multicast in OFDM-based CRNs 基于ofdm的crn中基于波束形成技术的多播资源分配
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992133
Yidi Yang, K. Niu, Zhicheng Li
{"title":"Resource allocation with beamforming technique for MDC multicast in OFDM-based CRNs","authors":"Yidi Yang, K. Niu, Zhicheng Li","doi":"10.1109/WCSP.2014.6992133","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992133","url":null,"abstract":"In this paper, we study a resource allocation scheme for downlink orthogonal frequency division multiplexing (OFDM) cognitive radio networks (CRNs) in which the cognitive base station (BS) is equipped with multiple antennas. The multiple description coding multicast (MDCM) model and beamforming technique are employed to maximize the total received rate of all cognitive radio (CR) users with the constraint on total transmission power and interference threshold to primary user (PU). This paper proposes a two-step suboptimal scheme to conduct the resource allocation: firstly, the beamforming vector (BY) and the subset of each multicast group (MG) are obtained with a heuristic approach, and then the transmission power and subcarńer allocation is realized by the dual optimization method. It has been verified in the simulation results that the proposed scheme performs better on both throughput maximization and interference management.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"23 26","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113973285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Interference-mitigation based antenna selection scheme in device-to-device communication underlaying cellular networks 蜂窝网络中基于设备对设备通信的干扰抑制天线选择方案
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992158
Yuyang Wang, Shi Jin, Yiyang Ni, Kai‐Kit Wong
{"title":"Interference-mitigation based antenna selection scheme in device-to-device communication underlaying cellular networks","authors":"Yuyang Wang, Shi Jin, Yiyang Ni, Kai‐Kit Wong","doi":"10.1109/WCSP.2014.6992158","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992158","url":null,"abstract":"This paper investigates an antenna selection scheme performing interference mitigation in device-to-device (D2D) communication underlaying cellular networks. Exact closed-form expression of the ergodic achievable rate is derived. Based on this result, the analysis in the high SNR regime at the base station (BS) and the scenario with very large antenna number are investigated, which indicate the saturation of the ergodic achievable rate when these parameters grow very large. Next, two approximations are then shown to be fairly tight, thus yielding much simpler expression of the ergodic achievable rate. Furthermore, we provide the performance analyses in the small cell and macro cell respectively and show that in the small cell, the high SNR approximation of the ergodic achievable rate varies proportionally with the transmit power ratio between the BS and the D2D transmitter. In the macro cell setting where the pathloss factor between the D2D terminals becomes much larger, we show that the ergodic achievable rate's improvement potentials by increasing the antenna number can be elevated with higher transmit power at the BS. Numerical results are then provided to verify the correctness of the expressions derived above. Some observations are made accordingly.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122536321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Constructing conflict graph for D2D communications in cellular systems 蜂窝系统D2D通信冲突图的构建
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992092
Wenbin Wu, Yuan Zhang
{"title":"Constructing conflict graph for D2D communications in cellular systems","authors":"Wenbin Wu, Yuan Zhang","doi":"10.1109/WCSP.2014.6992092","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992092","url":null,"abstract":"This paper presents a new method for constructing a conflict graph for D2D communications in cellular systems, which is useful for efficient radio resource allocation for D2D links. The construction is an iterative process which includes a broadcast-and-acknowledgment protocol. The convergence and delay performance of the proposed constructing process is theoretically analyzed. Simulation results demonstrate that our method have good performance in constructing the conflict graph and the result of theoretical analysis matches well with the simulation results.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125939433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A cascaded precoding scheme for two-tier heterogeneous networks 两层异构网络的级联预编码方案
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992209
Shengjie Guo, Xiangwei Zhou
{"title":"A cascaded precoding scheme for two-tier heterogeneous networks","authors":"Shengjie Guo, Xiangwei Zhou","doi":"10.1109/WCSP.2014.6992209","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992209","url":null,"abstract":"In a two-tier heterogeneous network with shared spectrum, the cross-tier interference and co-tier interference significantly affect the network performance. In this paper, we investigate a cascaded precoding scheme in orthogonal frequency-division multiplexing systems to protect macro-cell user equipments (MUEs) from the interference caused by co-located small cells and at the same time to satisfy the quality-of-service (QoS) requirement of small-cell user equipments (SUEs). An outer precoder ensures that the signals intended for the SUEs are orthogonal to the MUEs thus avoids the cross-tier interference from the second tier. Moreover, optimal power allocation through an inner precoder at each small base station (SBS) yields better performance of the SUEs and guarantees their QoS requirement. Considering the dense deployment of SBSs, we further propose an SBS selection algorithm to reduce the computational complexity of our scheme. Simulation results demonstrate that the cascaded precoding structure is effective in mitigating the interference and enhancing the capacity of small cells.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129387857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
D-GLDPC codes with 3-D single parity-check product codes as super check nodes D-GLDPC码以三维单奇偶校验产品码作为超级校验节点
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992199
Yejun He, Guiyuan Sun, Jie Yang, F. Lau
{"title":"D-GLDPC codes with 3-D single parity-check product codes as super check nodes","authors":"Yejun He, Guiyuan Sun, Jie Yang, F. Lau","doi":"10.1109/WCSP.2014.6992199","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992199","url":null,"abstract":"A doubly-generalized low-density parity-check (D-GLDPC) code is a low-density parity-check (LDPC) code, where both of the check nodes and variable nodes use linear block codes instead of repetition and single parity-check (SPC) codes. In this paper, we propose a class of D-GLDPC codes in which 3-dimensional (3-D) single parity-check product-codes (SPC-PCs) are used as super-check nodes (SCNs). We derive the extrinsic information transfer (EXIT) function of 3-D SPC-PCs used as SCNs, and analyze the performance of the proposed D-GLDPC codes over the additive white Gaussian noise (AWGN) channel with EXIT charts. Numerical analysis from EXIT charts shows that our proposed D-GLDPC codes can offer better decoding threshold than D-GLDPC codes with 2-D SPC-PCs as SCNs.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128525592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Low complexity LMMSE beamforming design for uplink virtual MIMO systems 上行虚拟MIMO系统低复杂度LMMSE波束形成设计
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992086
Niwei Wang, C. Xing, Yuan Zhou, Zesong Fei, Jingming Kuang
{"title":"Low complexity LMMSE beamforming design for uplink virtual MIMO systems","authors":"Niwei Wang, C. Xing, Yuan Zhou, Zesong Fei, Jingming Kuang","doi":"10.1109/WCSP.2014.6992086","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992086","url":null,"abstract":"In this paper, the beamforming designs for uplink virtual MIMO systems are investigated. In such systems, the most challenging difficulty in beamforming designs comes from the fact that the nodes consisting the virtual MIMO are subjected to individual power constraints or named per-antenna power constraints instead of sum power constraints. The instinct individual power constraints for virtual MIMO prohibit the derivation for closed-form solutions. Although in existing works, it has been revealed that under per-antenna power constraints the design problems are still convex and can be efficiently solved using some famous convex optimization tools such as semidefinite programming (SDP). Unfortunately, it is far from desired for practical implementations. In our work, linear minimum mean square error (LMMSE) beamforming is designed under per-antenna power constraints. Exploiting the hidden convexity, an iterative solution is proposed, which has clear structure and well-suited for virtual MIMO communications e.g, the uplink of Machine-to-Machine (M2M)communications in cellular networks. Finally, simulation results demonstrate the advantages of the proposed design.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128532819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An improved Bayesian NMF-based speech enhancement method using multivariate Laplace distribution 基于多变量拉普拉斯分布的改进贝叶斯神经网络语音增强方法
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992007
Liwei Zhang, Xiongwei Zhang, Xia Zou, Gang Min
{"title":"An improved Bayesian NMF-based speech enhancement method using multivariate Laplace distribution","authors":"Liwei Zhang, Xiongwei Zhang, Xia Zou, Gang Min","doi":"10.1109/WCSP.2014.6992007","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992007","url":null,"abstract":"Bayesian NMF (BNMF) algorithm joints nonnegative matrix factorization (NMF) with a statistical framework, and performs well in speech enhancement. However, the dependencies of atoms in speech frame are not considered in the method. In order to exploit the dependencies of the speech and noise signals, we introduce multivariate Laplace distribution for the basis W and NMF coefficients matrix H. In this paper, we propose a novel speech enhancement method, which is based on an improved Bayesian NMF (IBNMF) algorithm using multivariate Laplace distribution. The experimental results show that the proposed algorithm yields improvements in Log-spectral distance (LSD) and Perceptual Evaluation of Speech Quality (PESQ), compared to the other two algorithms, which are based on NMF and BNMF methods.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128707333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Joint relay beamforming and power splitting ratio optimization in a multi-antenna relay network 多天线中继网络中联合中继波束形成与功率分割比优化
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992047
Yi Yuan, Zheng Chu, Z. Ding, K. Cumanan, M. Johnston
{"title":"Joint relay beamforming and power splitting ratio optimization in a multi-antenna relay network","authors":"Yi Yuan, Zheng Chu, Z. Ding, K. Cumanan, M. Johnston","doi":"10.1109/WCSP.2014.6992047","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992047","url":null,"abstract":"This paper investigates simultaneous wireless information and power transfer (SWIPT) in a multi-antenna relay network. We consider robust transmit power minimization problem at the relay by jointly optimizing beamforming and adaptive power splitting subject to the signal-to-inference-plus-noise (SINR) and energy harvesting constraints by incorporating channel uncertainty model. We formulate the original non-convex problem into semidefinite programming problem (SDP) by relaxing rank-one constraint and we show the optimal solution of SDP is always rank-one. Simulation results are provided to validate the performance of the proposed robust algorithms.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"15 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121002885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
UCA-based orbital angular momentum radio beam generation and reception under different array configurations 不同阵列配置下基于uca的轨道角动量射电波束产生与接收
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992134
Huayang Wu, Y. Yuan, Zhaoyang Zhang, Ji Cang
{"title":"UCA-based orbital angular momentum radio beam generation and reception under different array configurations","authors":"Huayang Wu, Y. Yuan, Zhaoyang Zhang, Ji Cang","doi":"10.1109/WCSP.2014.6992134","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992134","url":null,"abstract":"The Orbital-Angular-Momentum (OAM)-carrying radio waves may provide extra rotational degree of freedom, which may potentially increase channel capacity and spectrum efficiency for future wireless communications. It has been demonstrated that circular antenna array could radiate OAM-carrying radio beam by feeding each element with certain phase offset. In this paper, by proper analyses and extensive simulations on the spatial amplitude and phase characteristics of the radiated electromagnetic field under three different array configurations, i.e., radial array, tangential array, and uniform circular array (UCA), respectively. We found that among the above settings UCA is the best way to generate the desired OAM-carrying beam with linear excitation. We then use multiple concentric antenna rings with elements of half-wave dipoles to generate and demultiplex multiple OAM states, and both spectral analyses and simulations verified the feasibility.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116341341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 38
Small cell switch policy: A reinforcement learning approach 小细胞切换策略:一种强化学习方法
2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP) Pub Date : 2014-12-22 DOI: 10.1109/WCSP.2014.6992126
Luyang Wang, Xinxin Feng, Xiaoying Gan, Jing Liu, Hui Yu
{"title":"Small cell switch policy: A reinforcement learning approach","authors":"Luyang Wang, Xinxin Feng, Xiaoying Gan, Jing Liu, Hui Yu","doi":"10.1109/WCSP.2014.6992126","DOIUrl":"https://doi.org/10.1109/WCSP.2014.6992126","url":null,"abstract":"Small cell is a flexible solution to satisfy the continuously increasing wireless traffic demand. In this paper, we focus on on-off switch operation on small cell base stations (SBS) in heterogeneous networks. In our scenario, the users can either choose SBS when it is active or macro cell base station (MBS) to transmit data. Start-up energy cost is considered when SBS switches on. The whole network acts as a queueing system, and network latency is also under consideration. The network traffic is modeled by a Markov Modulated Poisson Process (MMPP) whose parameters are unknown to the network control center. To maximize the system reward, we introduce a reinforcement learning approach to obtain the optimal on-off switch policy. The learning procedure is defined as a Markov Decision Process (MDP). An estimation method is proposed to measure the load of the network. A single-agent Q-learning algorithm is proposed afterwards. The convergence of this algorithm is proved. Simulation results are given to evaluate the performance of the proposed algorithm.","PeriodicalId":412971,"journal":{"name":"2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127092478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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