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| 1 | BGMM: A Body Gauss-Markov Based Mobility Model for Body Area Networks显示文摘Existing mobility models have limitations in their ability to simulate the movement of Wireless Body Area Network(WBAN) since body nodes do not exactly follow either classic mobility models or human contact distributions. In this paper, we propose a new mobility model called Body Gauss–Markov Mobility(BGMM) model,which is oriented specially to WBAN. First, we present the random Gauss-Markov mobility model as the most suitable theoretical basis for developing our new model, as its movement pattern can reveal real human body movements. Next, we examine the transfer of human movement states and derive a simplified mathematical Human Mobility Model(HMM). We then construct the BGMM model by combining the RGMM and HMM models. Finally,we simulate the traces of the new mobility model. We use four direct metrics in our proposed mobility model to evaluate its performance. The simulation results show that the proposed BGMM model performs with respect to the direct mobility metrics and can effectively represent a general WBAN-nodes movement pattern. | Yi Liu Danpu Liu Guangxin Yue | 2018 | Tsinghua Science and Technology2018，23，3： | 4 |
| 2 | A Cooperative MIMO Transmission Scheme for Cluster-based Wireless Sensor Networks显示文摘 | Ding Jie Liu Danpu Wu Huari | 2010 | China Communications2010，7，5： | 3 |
| 3 | Robust hybrid beamforming design for millimeter-wave massive MIMO systems显示文摘Hybrid analog-digital beamforming is recognized as a promising solution for a practical implementation of massive multiple-input multiple-output(MIMO) systems based on millimeter-wave(mmWave) technology. In view of the overwhelming hardware cost and excessive power consumption and the imperfection of the channel state information(CSI), a robust hybrid beamforming design is proposed for the mmWave massive MIMO systems, where the robustness is defined with respect to imperfect knowledge or error of the CSI at the transmitter due to limited feedback and/or imperfect channel estimation. Assuming the errors of the CSI are bounded, the optimal hybrid beamforming design with robustness is formulated to a mean squared error(MSE) minimization problem. An iterative semidefinite programming(SDP) based algorithm is proposed to obtain the beamforming matrices. Simulation results show that the proposed robust design can provide more than 4 dB performance gain compared to that of non-robust design. | Zhang Kai Xu Guixian Yin Changchuan Liu Danpu | 2019 | The Journal of China Universities of Posts and Telecommunications2019，26，3： | 1 |
| 4 | Off-Grid Compressed Channel Estimation with Parallel Interference Cancellation for Millimeter Wave Massive MIMO显示文摘Millimeter wave(mmWave)massive multiple-input multiple-output(MIMO)plays an important role in the fifth-generation(5G)mobile communications and beyond wireless communication systems owing to its potential of high capacity.However,channel estimation has become very challenging due to the use of massive MIMO antenna array.Fortunately,the mmWave channel has strong sparsity in the spatial angle domain,and the compressed sensing technology can be used to convert the original channel matrix into the sparse matrix of discrete angle grid.Thus the high-dimensional channel matrix estimation is transformed into a sparse recovery problem with greatly reduced computational complexity.However,the path angle in the actual scene appears randomly and is unlikely to be completely located on the quantization angle grid,thus leading to the problem of power leakage.Moreover,multiple paths with the random distribution of angles will bring about serious interpath interference and further deteriorate the performance of channel estimation.To address these off-grid issues,we propose a parallel interference cancellation assisted multi-grid matching pursuit(PIC-MGMP)algorithm in this paper.The proposed algorithm consists of three stages,including coarse estimation,refined estimation,and inter-path cyclic iterative inter-ference cancellation.More specifically,the angular resolution can be improved by locally refining the grid to reduce power leakage,while the inter-path interference is eliminated by parallel interference cancellation(PIC),and the two together improve the estimation accuracy.Simulation results show that compared with the traditional orthogonal matching pursuit(OMP)algorithm,the normalized mean square error(NMSE)of the proposed algorithm decreases by over 14dB in the case of 2 paths. | Liu Jinru Tian Yongqing Liu Danpu Zhang Zhilong | 2024 | China Communications2024，21，3： | 0 |
| 5 | IPv4 Based Reliable Mobile Multicast Technology显示文摘The mobile multicast technology has been a research hotspot in the wireless Internet field in recent years.Quite a large part of its applications requires the reliability in a mobile environment to be equivalent to that provided by wireline links.However,the inherent features of a mobile environment,that is,high error rate of links and dynamically changing multicast members' locations,are great difficulties for mobile multicast,let alone reliable mobile multicast.The IPv4-based reliable mobile multicast algorithms come with two different design philosophies.A part of the algorithms is to be improved for better reliability by solving existing algorithm-related problems;while other algorithms are to implement reliable mobile multicast with new function entities introduced to guarantee reliability. | Zhong Qiu,Chen Xiaohua,Liu Danpu(Beijing University of Posts and Telecommunications,Beijing 100876,P.R.China) | 2009 | ZTE Communications2009，7，3： | 0 |
| 6 | WiMAX and Its Applications (1)显示文摘WiMAX, an emerging broadband radio access technology, has attracted much attention from the whole telecom industry in recent years. Its main features are the high-speed transmission rate, large coverage, support for mobility, QoS guarantee and all-IP architecture. The technology fulfills the integration of packetized data, broadband access and mobillized terminal therefore, it has a bright future for wide application. This lecture will discuss WiMAX in four parts. This part will introduce the main features of WiMAX and IEEE 802.16 standards, the protocol structure, and the basic characteristics and key technologies for the physical layer. In the next three parts, the MAC layer and its QoS mechanism, WiMAX network architecture, WiMAX applications, and the development tendency of WiMAX will be discussed. | Liu Danpu, Hao Jianjun, Yue Guangxin (Beijing University of Posts and Telecommunications, Beijing 100876, China) | 2008 | ZTE Communications2008，6，1： | 0 |
| 7 | WiMAX and Its Applications (2)显示文摘Worldwide Interoperability for Microwave Access (WiMAX), an emerging broadband radio access technology, has attracted much attention from the whole telecom industry in recent years. Its main features are the high-speed transmission rate, large coverage, support for mobility, QoS guarantee and all-IP architecture. The technology fulfills the integration of packetized data, broadband access and mobilized terminal; therefore, it has a bright future for wide application. This lecture discusses WiMAX in four parts, and this part introduces the MAC layer and its QoS mechanism. | Liu Danpu, Hao Jianjun, Yue Guangxin (Beijing University of Posts and Telecommunications, Beijing 100876, China) | 2008 | ZTE Communications2008，6，2： | 0 |
| 8 | WiMAX and Its Applications (3)显示文摘Worldwide Interoperability for Microwave Access (WiMAX), an emerging broadband radio access technology, has attracted much attention from the whole telecom industry in recent years. Its main features are the high-speed transmission rate, large coverage, support for mobility, QoS guarantee and all-IP architecture. The technology fulfills the integration of packetized data, broadband access and mobilized terminal; therefore, it has a bright future for wide application. This lecture discusses WiMAX in four parts, and this part introduces QoS mechanism of the MAC layer and the WiMAX network architecture. | Liu Danpu, Hao Jianjun, Yue Guangxin (Beijing University of Posts and Telecommunications, Beijing 100876, China) | 2008 | ZTE Communications2008，6，3： | 0 |
| 9 | WiMAX and Its Applications (4)显示文摘Worldwide Interoperability for Microwave Access (WiMAX), an emerging broadband radio access technology, has attracted much attention from the whole telecom industry in recent years. Its main features are high-speed transmission rate, large coverage, support for mobility, QoS guarantee and all-IP architecture. The technology fulfills the integration of packetized data, broadband access and mobilized terminal; therefore, it has a bright future for wide application. This lecture discusses WiMAX in four parts, and this part introduces QoS mechanism of the MAC layer and the WiMAX network architecture. | Liu Danpu, Hao Jianjun, Yue Guangxin (Beijing University of Posts and Telecommunications, Beijing 100876, P.R.China) | 2008 | ZTE Communications2008，6，4： | 0 |
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