Journal of China Universities of Posts and Telecommunications最新文献_第8页

Low complexity robust linear transceiver design for MIMO interference channel MIMO干扰信道的低复杂度鲁棒线性收发器设计

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-12-01 Epub Date: 2017-02-24 DOI: 10.1016/S1005-8885(16)60073-0

Geng Xuan, Li Conggai, Liu Feng

引用次数: 1

Textual-geographical-social aware point-of-interest recommendation 文本地理社会意识兴趣点推荐

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-12-01 Epub Date: 2017-02-24 DOI: 10.1016/S1005-8885(16)60066-3

Ren Xingyi, Song Meina, E Haihong, Song Junde

{"title":"Textual-geographical-social aware point-of-interest recommendation","authors":"Ren Xingyi, Song Meina, E Haihong, Song Junde","doi":"10.1016/S1005-8885(16)60066-3","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60066-3","url":null,"abstract":"<div><p>The rapid development of location-based social networks (LBSNs) has provided an unprecedented opportunity for better location-based services through point-of-interest (POI) recommendation. POI recommendation is personalized, location-aware, and context depended. However, extreme sparsity of user-POI matrix creates a severe challenge. In this paper we propose a textual-geographical-social aware probabilistic matrix factorization method for POI recommendation. Our model is textual-geographical-social aware probabilistic matrix factorization called TGS-PMF, it exploits textual information, geographical information, social information, and incorporates these factors effectively. First, we exploit an aggregated latent Dirichlet allocation (LDA) model to learn the interest topics of users and infer the interest POIs by mining textual information associated with POIs and generate interest relevance score. Second, we propose a kernel estimation method with an adaptive bandwidth to model the geographical correlations and generate geographical relevance score. Third, we build social relevance through the power-law distribution of user social relations to generate social relevance score. Then, our exploit probabilistic matrix factorization model (PMF) to integrate the interest, geographical, social relevance scores for POI recommendation. Finally, we implement experiments on a real LBSN check-in dataset. Experimental results show that TGS-PMF achieves significantly superior recommendation quality compared to other state-of-the-art POI recommendation techniques.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 6","pages":"Pages 24-33, 67"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60066-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72232224","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: 6

VoIP transmission mechanism based on TCP 基于TCP的VoIP传输机制

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-12-01 Epub Date: 2017-02-24 DOI: 10.1016/S1005-8885(16)60075-4

Shuang Kai, Guan Zhe, Meng Chunzhi

{"title":"VoIP transmission mechanism based on TCP","authors":"Shuang Kai, Guan Zhe, Meng Chunzhi","doi":"10.1016/S1005-8885(16)60075-4","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60075-4","url":null,"abstract":"<div><p>As the widespread employment of firewalls on the Internet, user datagram protocol (UDP) based voice over Internet protocol (VoIP) system will be unable to transmit voice data. This paper proposed a novel method to transmit voice data based on transmission control protocol (TCP). The method adopts a disorder TCP transmission strategy, which allows discontinuous data packets in TCP queues read by application layer directly without waiting for the retransmission of lost data packets. A byte stream data boundary identification algorithm based on consistent overhead byte stuffing algorithm is designed to efficiently identify complete voice data packets from disordered TCP packets arrived so as to transmit the data to the audio processing module timely. Then, by implementing the prototype system and testing, we verified that the proposed algorithm can solve the high time delay, jitter and discontinuity problems in standard TCP protocol when transmitting voice data packets, which caused by its error control and retransmission mechanism. We proved that the method proposed in this paper is effective and practical.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 6","pages":"Pages 90-96"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60075-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72232230","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

Design of a modified circular-cut multiband fractal antenna 一种改进的圆形切割多频带分形天线的设计

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-12-01 Epub Date: 2017-02-24 DOI: 10.1016/S1005-8885(16)60072-9

Hu Zhangfang, Xin Wei, Luo Yuan, Hu Yinping, Zhou Yongxin

{"title":"Design of a modified circular-cut multiband fractal antenna","authors":"Hu Zhangfang, Xin Wei, Luo Yuan, Hu Yinping, Zhou Yongxin","doi":"10.1016/S1005-8885(16)60072-9","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60072-9","url":null,"abstract":"<div><p>This paper presents a modified circular-cut multiband fractal antenna with good radiation patterns designed for digital cellular system (DCS), personal communication system (PCS), 2.4/5.2/5.8 GHz wireless local area networks (WLAN) and 2.5/3.5/5.5 GHz worldwide interoperability for microwave access (WiMAX) applications simultaneously. Originally, the modified circular monopole antenna is designed to resonate at around 2.1 GHz and 3.6 GHz. After subtracting the circular iterative tree fractal structure, it can produce three other resonances at around 5.6 GHz, 6.47 GHz and 7.89 GHz. Besides, as the number of iterations increases, not only do the new frequency bands appear (it demonstrates the good self-similarity property of the proposed antenna), but also the operating bands shift from high frequency to low frequency (it shows the well space filling property). Furthermore, the proposed antenna owns a compact structure, which can achieve the 5.28 dBi of relative high gain. And the measured results are basically accordant to simulated results, which proves the effectiveness of the proposed antenna.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 6","pages":"Pages 68-75"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60072-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72232227","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: 16

Coverage analysis of cache-enabled small cell networks with stochastic geometry methods 基于随机几何方法的高速缓存小型蜂窝网络覆盖率分析

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-12-01 Epub Date: 2017-02-24 DOI: 10.1016/S1005-8885(16)60068-7

Zhang Qi, Teng Yinglei, Liu Mengting, Song Mei

引用次数: 0

Joint load balancing and interference coordination in multi-antenna heterogeneous networks 多天线异构网络中的联合负载平衡与干扰协调

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-12-01 Epub Date: 2017-02-24 DOI: 10.1016/S1005-8885(16)60067-5

Zhu Wenfeng, Qiu Ling, Chen Zheng, Liang Xiaowen

{"title":"Joint load balancing and interference coordination in multi-antenna heterogeneous networks","authors":"Zhu Wenfeng, Qiu Ling, Chen Zheng, Liang Xiaowen","doi":"10.1016/S1005-8885(16)60067-5","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60067-5","url":null,"abstract":"<div><p>In heterogeneous networks (HetNets), it is desirable to offload users from macro cells to small cells to achieve load balancing. However, the offloaded users suffer a strong inter-tier interference. To guarantee the performance of the offloaded users, the interference from macro cells should be carefully managed. In this paper, we jointly optimize load balancing and interference coordination in multi-antenna HetNets. Different from previous works, instead of almost blank subframes (ABS) on which the macro cells waste time resource, the macro cells suppress the interference to the offloaded users by zero-forcing beamforming (ZFBF) on interference nulling subframes (INS). Considering user association cannot be conduct frequently, we derive the long-term throughput of users over Rayleigh fading channels while previous works focused on instantaneous rate. From the perspective of the spectrum efficiency and user fairness, we formulate a long-term network-wide utility maximization problem. By decomposing the problem into two subproblems, we propose an efficient joint load balancing and interference coordination strategy. Simulation results show that our proposal can achieve good system performance gains over counterparts in term of the network utility, cell edge throughput and average throughput.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 6","pages":"Pages 34-40"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60067-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72232223","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

Construction of compressed sensing matrixes based on the singular pseudo-symplectic space over finite fields 有限域上基于奇异伪辛空间的压缩传感矩阵的构造

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-12-01 Epub Date: 2017-02-24 DOI: 10.1016/S1005-8885(16)60074-2

Gao You, Tong Fenghua, Zhang Xiaojuan

引用次数: 0

Performance analysis of frequency synchronization in MIMO-OFDM systems with ST/MRC scheme 基于ST/MRC方案的MIMO-OFDM系统频率同步性能分析

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-10-01 Epub Date: 2017-01-02 DOI: 10.1016/S1005-8885(16)60052-3

Han Daoqi, Zhang Jianhua, Yu Hao, Liu Mengmeng

引用次数: 3

Video super-resolution reconstruction based on deep convolutional neural network and spatio-temporal similarity 基于深度卷积神经网络和时空相似性的视频超分辨率重建

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-10-01 Epub Date: 2017-01-02 DOI: 10.1016/S1005-8885(16)60060-2

Li Linghui, Du Junping, Liang Meiyu, Ren Nan, Fan Dan

{"title":"Video super-resolution reconstruction based on deep convolutional neural network and spatio-temporal similarity","authors":"Li Linghui, Du Junping, Liang Meiyu, Ren Nan, Fan Dan","doi":"10.1016/S1005-8885(16)60060-2","DOIUrl":"https://doi.org/10.1016/S1005-8885(16)60060-2","url":null,"abstract":"<div><p>Existing learning-based super-resolution (SR) reconstruction algorithms are mainly designed for single image, which ignore the spatio-temporal relationship between video frames. Aiming at applying the advantages of learning-based algorithms to video SR field, a novel video SR reconstruction algorithm based on deep convolutional neural network (CNN) and spatio-temporal similarity (STCNN-SR) was proposed in this paper. It is a deep learning method for video SR reconstruction, which considers not only the mapping relationship among associated low-resolution (LR) and high-resolution (HR) image blocks, but also the spatio-temporal non-local complementary and redundant information between adjacent low-resolution video frames. The reconstruction speed can be improved obviously with the pre-trained end-to-end reconstructed coefficients. Moreover, the performance of video SR will be further improved by the optimization process with spatio-temporal similarity. Experimental results demonstrated that the proposed algorithm achieves a competitive SR quality on both subjective and objective evaluations, when compared to other state-of-the-art algorithms.</p></div>","PeriodicalId":35359,"journal":{"name":"Journal of China Universities of Posts and Telecommunications","volume":"23 5","pages":"Pages 68-81"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8885(16)60060-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72232722","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: 5

Modeling and analysis of epidemic spreading on community network with node's birth and death 考虑节点生死的社区网络疫情传播建模与分析

Journal of China Universities of Posts and Telecommunications Pub Date : 2016-10-01 Epub Date: 2017-01-02 DOI: 10.1016/S1005-8885(16)60061-4

Li Chanchan , Jiang Guoping

引用次数: 0