中国通信杂志 统计源期刊 CSCD期刊

Low-Complexity Signal Detection Based on Relaxation Iteration Method in Massive MIMO Systems

作者：GUO; Ruohan; LI; Xiaohui; FU; Weihong; HEI; Yongqiang 刊期：2015年第S1期

Minimum mean square error(MMSE) detection algorithm can achieve nearly optimal performance when the number of antennas at the base station(BS) is large enough compared to the number of users. But the traditional MMSE involves complicated matrix inversion. In this paper, we propose a modified MMSE algorithm which expl...

Towards 5G

作者：The; Editor 刊期：2015年第S1期

Low-Complexity Soft-Output Detection for Massive MIMO Using SCBiCG and Lanczos Methods

作者：XIAO; Chiyang; SU; Xin; ZENG; Jie; RONG; Liping; XU; Xibin; WANG; Jing 刊期：2015年第S1期

Massive MIMO is a promising technology to improve spectral efficiency, cell coverage, and system capacity for 5G. However, these benefits take place at great cost of computational complexity, especially in systems with hundreds of antennas at the base station. This paper aims to address the minimum mean square error(...

Co-Channel Interference Suppression Techniques for Full Duplex Cellular System

作者：XIN; Yongchao; MA; Meng; ZHAO; Zijun; JIAO; Bingli 刊期：2015年第S1期

Co-frequency and co-time full duplex(CCFD) is a promising technique for improving spectral efficiency in next generation wireless communication systems. However, for the applications of CCFD in a cellular network, severe co-channel interference is an essential problem. Specifically, there are two significant interfer...

Non-Orthogonal Multiple Access(NOMA) for Future Downlink Radio Access of 5G

作者：LI; Anxin; LAN; Yang; CHEN; Xiaohang; JIANG; Huiling 刊期：2015年第S1期

Multiple access(MA) technology is of most importance for 5G. Non-orthogonal multiple access(NOMA) utilizing power domain and advanced receiver has been considered as a promising candidate MA technology recently. In this paper, the NOMA concept is presented toward future enhancements of spectrum efficiency in lower fr...

Prototype for 5G New Air Interface Technology SCMA and Performance Evaluation

作者：LU; Lei; CHEN; Yan; GUO; Wenting; YANG; Huilian; WU; Yiqun; XING; Shuangshuang 刊期：2015年第S1期

Sparse code multiple access(SCMA) is a novel non-orthogonal multiple access scheme proposed to meet the challenging demand of the future 5G communications, especially in support of the massive connections. The coded bits from each data stream will be directly mapped as multi-dimensional SCMA codeword in complex domai...

Low-Complexity Channel Reconstruction Methods Based on SVD-ZF Precoding in Massive 3D-MIMO Systems

作者：REN; Yuwei; SONG; Yang; SU; Xin 刊期：2015年第S1期

In this paper, we study the low-complexity channel reconstruction methods for downlink precoding in massive multiple-Input multiple-Output(MIMO) systems. When the user is allocated less streams than the number of its antennas, the base station(BS) or user usually utilizes the singular value decomposition(SVD) to get ...

Heterogeneous Control and Data Sub-network for Millimeter-Wave Communications

作者：ZHANG; Xiaoxiao; ZHAO; Liqiang; LIANG; Kai 刊期：2015年第S1期

Millimeter-wave(mmWave) communications are highly focused as a powerful mean enabling to perform very high data transmission. However it has several inherent shortcomings like directional transmission and serious attenuation in atmosphere. So it is difficult to implement random access in mm Wave WLANs. In this paper,...

Spectral Efficiency Analysis for Downlink Massive MIMO Systems with MRT Precoding

作者：LIN; Yingchao; LI; Xiaohui; FU; Weihong; HEI; Yongqiang 刊期：2015年第S1期

As an important part of the channel fading, large scale fading should be considered in downlink massive multiple-input multipleoutput(MIMO) systems. This paper investigates the downlink massive MIMO system over a large scale fading channel, when the base station takes advantage of maximum-radio transmission(MRT) prec...

Low Complexity Energy Optimization Algorithm for Massive MIMO systems

作者：YUAN; Jingya; LI; Xiaohui; HEI; Yongqiang; FU; Weihong 刊期：2015年第S1期

We consider the problem of nearly optimal energy efficiency in massive(Multiinput Multi-output) MIMO systems. Considering the correlated channel in practice, we derive the ergodic expression with zero-forcing precoding and analyze the simplified antennas selection method. Aiming at optimizing the energy efficiency, t...

Joint Optimization of Peak-to-Average Power Ratio and Spectral Leakage in 5G Multicarrier Waveforms

作者：WEI; Peng; DAN; Lilin; ZHOU; Cheng; XIAO; Yue; WU; Gang; LI; Shaoqian 刊期：2015年第S1期

High peak-to-average-power ratio(PAPR) and spectral leakage are two main drawbacks of multicarrier systems, such as in orthogonal frequency division multiplexing(OFDM), in future 5G wireless communications. For generating optimized wave forms for 5G communications, this paper proposes an iterative scheme combining ti...

Energy-Efficient User Association in Heterogeneous Networks with M2M/H2H Coexistence under QoS Guarantees

作者：TIAN; Hui; XU; Youyun; XU; Kui; JING; Jun; WU; Kun 刊期：2015年第S1期

In this paper, we propose an energy efficient user association scheme for uplink heterogeneous networks with machine-to-machine(M2M) and human-to-human(H2H) coexistence. A group based random access protocol is designed for massive number of machine-typecommunications(MTC) user equipments’(UEs) transmissions. A user ...

Inter-Operator Interference Coordination for CoPrimary Spectrum Sharing in UDN

作者：YU; Qiaoling; WANG; Jiang; YANG; Xiumei; ZHU; Yuanping; TENG; Yong; Horneman; Kari 刊期：2015年第S1期

Co-primary spectrum sharing for multiple operators has been utilized to fully explore the spectrum resources and thus improve the spectrum efficiency. The inter-operator interference(IOI) problem should be seriously considered in order to achieve the mentioned target, especially under the scenario of the ultradense n...

Easy Network: The Way to Go for 5G

作者：LIU; Yang; SHE; Xiaoming; CHEN; Peng; ZHU; Jianchi; YANG; Fengyi 刊期：2015年第S1期

To satisfy the explosive growth of mobile data traffic and communication connections in the year 2020 and beyond, the 5th generation(5G) mobile network will have to support more access schemes, frequency bands and diversified scenarios compared with the existing networks. Throughout the development of communication s...

A Flexible Three Clouds 5G Mobile Network Architecture Based on NFV & SDN

作者：YANG; Fengyi; WANG; Haining; MEI; Chengli; ZHANG; Jianmin; WANG; Min 刊期：2015年第S1期

Along with the completion of the development of 4G technologies, the global mobile community starts the study of the next generation technologies, i.e. 5G technologies. This paper proposes a new flexible architecture for 5G mobile networks based on Network Function Virtualization(NFV) and Software Defined Network(SDN...