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| 1 | Low complexity construction for quasi-cyclic low-density parity-check codes by Progressive-Block Growth显示文摘In this paper, a novel method for constructing quasi-cyclic LDPC codes with low complexity is proposed. By choosing each circulant permutation matrix sequentially, the proposed method ensures that the current circulant permutation matrix forms no cycles of length smaller than g with the existent circulant permutation matrices. The construction complexity of the proposed algorithm is much lower than that of the random construction. Simulation results show that the proposed QC-LDPC codes can outperform both the random regular LDPC codes with short to moderate block lengths, and the proposed construction method LDPC codes based on the finite geometries in terms of bit-error-rate (BER). | REN PinYi YUAN Qiang WANG Rui CAI Jun | 2011 | Science China(Information Sciences)2011，54，2： | 6 |
| 2 | Semi-Supervised Learning Based Big Data-Driven Anomaly Detection in Mobile Wireless Networks显示文摘With rising capacity demand in mobile networks, the infrastructure is also becoming increasingly denser and complex. This results in collection of larger amount of raw data(big data) that is generated at different levels of network architecture and is typically underutilized. To unleash its full value, innovative machine learning algorithms need to be utilized in order to extract valuable insights which can be used for improving the overall network's performance. Additionally, a major challenge for network operators is to cope up with increasing number of complete(or partial) cell outages and to simultaneously reduce operational expenditure. This paper contributes towards the aforementioned problems by exploiting big data generated from the core network of 4 G LTE-A to detect network's anomalous behavior. We present a semi-supervised statistical-based anomaly detection technique to identify in time: first, unusually low user activity region depicting sleeping cell, which is a special case of cell outage; and second, unusually high user traffic area corresponding to a situation where special action such as additional resource allocation, fault avoidance solution etc. may be needed. Achieved results demonstrate that the proposed method can be used for timely and reliable anomaly detection in current and future cellular networks. | bilal hussain qinghe du pinyi ren | 2018 | China Communications2018，15，4： | 5 |
| 3 | Review of optical fibre sensors for electrical equipment characteristic state parameters detection显示文摘Optical fibre sensing technology is a powerful method for long-term reliable sensing in harsh environments,which means it is particularly suitable for the detection of electrical equipment characteristic state parameters,including characteristic gases,abnormal vibration,ultrasonic produced by partial discharge,and abnormal temperature rise.This paper reviews several individual optical fibre sensors for different state parameters detection,discusses the advantages,limitations and possible improvement methods,and finally presents the most promising optical fibre sensor for each state parameter. | Weigen Chen Jianxin Wang Fu Wan Pinyi Wang | 2019 | High Voltage2019，4，4： | 4 |
| 4 | Rectangle blocking matrices based unitary multistage Wiener reduced-rank joint detection algorithm for multiple input multiple output systems显示文摘Traditional equalization algorithms for multiple input multiple output (MIMO) systems suffer from high complexity and low convergence rate. So an improved adaptive reduced-rank joint detection algorithm of multistage Wiener filter (MSWF) based on rectangle blocking matrices is proposed. The MSWF is implemented by the correlation subtraction algorithm (CSA) structure and is called unitary multistage Wiener filter (UMSWF). The new scheme adopts rectangle submatrix as blocking matrix, which is chosen from the square blocking matrix for UMSWF. The proposed algorithm can reduce the size of the observation data vectors step by step in the forward recursion decomposition of UMSWF. Thus, the computational complexity is reduced and the convergence rate is increased. Theoretical analysis and simulation results show that this improved adaptive reduced-rank joint detection algorithm of UMSWF based on rectangle blocking matrix has better performance such as lower complexity and faster convergence rate. In particular, simulations are conducted in the verticalBell Labs layered space-time (V-BLAST) system which adopts BPSK modulation, where 4 and 8 antennas are equipped at the transmitter and receiver, respectively. Compared with traditional equalization algorithm based on UMSWF, our new method can achieve the same BER performance at high SNR with only 0.5 times that of computational complexity. | REN PinYi WANG Rui ZHANG ShiJiao | 2010 | Science China(Information Sciences)2010，53，10： | 3 |
| 5 | Joint Dynamic Clustering and User Scheduling for Downlink Cloud Radio Access Network with Limited Feedback显示文摘In limited feedback-based CloudRAN(C-RAN) systems,the inter-cluster and intra-cluster interference together with the quantification error can seriously deteriorates the system spectral efficiency.We,in this paper,propose an efficient three-phase framework and corresponding algorithms for dealing with this problem.Firstly,a greedy scheduling algorithm based on the lower bound of the ergodic rate is performed for generating an elementary cluster in the first phase.And then the elementary cluster is divided into many small clusters according to the following proposed algorithms based on the short term instantaneous information in the second phase.In the end,based on the limited feedback two zero-forcing(ZF) precoding strategies are adopted for reducing the intra-cluster interference in the third phase.The provided Monte Carlo simulations show the effectiveness of our proposed algorithms in the respect of system spectral efficiency and average user rate. | XU Dongyang REN Pinyi DU Qinghe SUN Li | 2015 | China Communications2015，12，12： | 2 |
| 6 | Towards win-win: weighted-Voronoi-diagram based channel quantization for security enhancement in downlink cloud-RAN with limited CSI feedback显示文摘Physical layer(PHY) security is recently proved to enable improving the security of wireless communication networks. In downlink frequency division duplex(FDD) cloud radio access network(C-RAN), the performance of PHY security highly relies on the channel state information(CSI) which is usually acquired through the codebook-quantization-based technique at the transceiver. However, the conventional quantization method aggravates the leakage of privacy information in C-RAN under the eavesdropping environment. In this paper, a novel channel quantization method is investigated to improve the secrecy-rate performance of C-RAN by exploiting the high-dimension space geometry. Based on this method, it is proved that when the statistical distribution of the channel matrices of both the legitimate user and the eavesdropper is exploited, a win-win situation can be created where secrecy-rate gains are improved without sacrificing beamforming gains from the point of view of ergodic rate. Particularly, a secrecy-oriented criterion is devised to implement the proposed method for generating codebooks. Then a weighted Voronoi diagram(WVD) is formulated on the complex Grassmann manifold and finally, a vector quantization based algorithm is proposed to build up novel quantization codebooks iteratively. Simulation results further validate the superiority of our proposed codebooks over conventional codebooks in C-RAN systems. | Dongyang XU Pinyi REN Qinghe DU Li SUN Yichen WANG | 2017 | Science China(Information Sciences)2017，60，4： | 2 |
| 7 | A DYNAMIC SPECTRUM ACCESS NETWORK BASED ON COGNITIVE RADIO显示文摘Dynamic spectrum access technologies based on Cognitive Radio(CR) is under intensive research carried out by the wireless communication society and is expected to solve the problem of spectrum scarcity.However,most enabling technologies related to dynamic spectrum access are con-sidered individually.In this paper,we consider these key technologies jointly and introduce a new implementation scheme for a Dynamic Spectrum Access Network Based on Cognitive Radio(DSAN-BCR).We start with a flexible hardware platform for DSAN-BCR,as well as a flexible protocol structure that dominates the operation of DSAN-BCR.We then focus on the state of the art of key technologies such as spectrum sensing,spectrum resources management,dynamic spectrum access,and routing that are below the network layer in DSAN-BCR,as well as the development of technologies related to higher layers.Last but not the least,we analyze the challenges confronted by these men-tioned technologies in DSAN-BCR,and give the perspectives on the future development of these technologies.The DSAN-BCR introduced is expected to provide a system level guidance to alleviate the problem of spectrum scarcity. | Ren Pinyi Wang Jun Li Shaoqian | 2010 | Journal of Electronics(China)2010，27，5： | 2 |
| 8 | TRANSMIT ANTENNA SELECTION IN V-BLAST SYSTEM显示文摘In order to reduce the cost of Radio Frequency (RF) chains in the spatial multiplexing systems with Vertical-Bell Labs Layered Space-Time (V-BLAST) nonlinear receiver, a novel transmit antenna selection cri-terion is proposed with the motivation of minimizing the Vector Symbol Error Rate (VSER). In the proposed scheme, both the number of substreams and the mapping of substreams to antennas are dynamically adjusted based on the knowledge of channel. Simulation results illustrate that the proposed two-step selection criterion outperforms the existing eigenmode based selection criterion by 0.3dB at a VSER of 10?3. | Feng Xingle Zhu Shihua Ren Pinyi | 2006 | Journal of Electronics(China)2006，23，4： | 2 |
| 9 | A Highly Selective and Sensitive Ratiometric Fluorescent Probe for pH Measurement Based on Fluorescence Resonance Energy Transfer显示文摘 | LIANG Fanghui WANG Di MA Pinyi WANG Xinghua SONG Daqian YU Yong | 2015 | Chemical Research in Chinese Universities2015，31，5： | 1 |
| 10 | Genkwadane F-I,New Daphnane-type Diterpenes from the Flower Buds of Daphne genkwa Sieb.et Zucc.Exhibit Anti-tumor Activities via lnducing Apoptosis显示文摘of main observation and conclusion Genkwadane F-I(1-4),four new diterpenes,along with four known ones(5-8),were isolated from the flower buds of D.genkwa.The structures including absolute configurations of 1-4 were determined based on the analysis of NMR and ECD calculations.All compounds were evaluated for their cytotoxicities against MCF-7 and Hep3B cell lines,among which compounds 3 and 4 showed significant activities.Compound 4 exhibited the most potent activity with IC50 values of 1.33μM against MCF-7,and the IC50 values of compound 3 against MCF-7 and Hep3B were 5.54μM and 8.73μM;respectively.Further studies by Hoechst 33258 staining and Annexin V/PI analysis demonstrated that compounds 3 and 4 could induce apoptosis to exhibit anti-tumor activities. | Xuewen Hou Jingjie Chen Xuefen Hou Pinyi Gao Jinlin Wang Shaojiang Song Lingzhi Li | 2020 | Chinese Journal of Chemistry2020，38，12： | 1 |
| 11 | Delay and Throughput Oriented Continuous Spectrum Sensing Schemes in Cognitive Radio Networks 显示文摘 | WENSHAN Y PINYI R QINGHE D | 2012 | Wireless Communications IEEE Transactions on2012，11，6： | 1 |
| 12 | Fountain-coding aided strategyfor secure cooperative transmission in industrialwireless sensor networks显示文摘 | Sun Li Ren Pinyi Du Qinghe | 2015 | IEEE Transactions on IndustrialInformatics2015，12，1： | 1 |
| 13 | Risk factors and clinical indica- tion of metastasis to lymph nodes posterior to fight recurrent la- ryngeal nerve in papillary thyroid carcinoma: A single-center study in China显示文摘 | Pinyi Z Bin Z Jianlong B | 2014 | Head Neck2014，36，9： | 1 |
| 14 | Microwave sintering and grain growth behavior of nano-grained BaTiO3 materials显示文摘 | Cben Chengsao Chen Pinyi Chou Chenchia | 2012 | Ceramics International2012，38，1： | 1 |
| 15 | Clinical trials of traditional Chinese medicine in the treatment of diabetic nephropathy - A systematic review based on a subgroup analysis显示文摘 | Liu Xiaoyu Liu Lling Chen Pinyi | 2013 | Journal of Ethnopharmacology2013，151，2： | 1 |
| 16 | Risk factors and clinical indica- tion of metastasis to lymph nodes posterior to righ recurrent la- ryngeal nerve in papillary thyroid carcinoma: A single-center study in China 显示文摘 | Pinyi Z Bin Z Jianlong B | 2014 | Head Neck2014，36，9： | 1 |
| 17 | Using HPMC to improve crust crispness in microwave-reheated battered mackerel nuggets: Water barrier effect of HPMC 显示文摘 | Chen Chienli Li Pinyi Hu Wenhung | 2008 | Food Hydrocolloids2008，22，7： | 1 |
| 18 | Rapid deter- mination of mela mine in milk and milk powder by surface- enhanced Raman spectroscopy and using cyclodextrin- decorated silver nanoparticles显示文摘 | Ma Pinyi Liang Fanghui Sun Ying | 2013 | Microchimica Acta2013，180，： | 1 |
| 19 | Nutritional protective mechanisms against gut inflammation显示文摘 | Monica Viladomiu Raquel Hontecillas Lijuan Yuan Pinyi Lu Josep Bassaganya-Riera | 2013 | The Journal of Nutritional Biochemistry2013，，6： | 1 |
| 20 | Rapid determination of melamine in milk and milk powder by surface-enhanced Raman spectroscopy and using cyclodextrin-decorated silver nanoparticles显示文摘 | Pinyi Ma Fanghui Liang Ying Sun Yue Jin Yang Chen Xinghua Wang Hanqi Zhang Dejiang Gao Daqian Song | 2013 | Microchimica Acta (-)2013，，11： | 1 |
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