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Zhigang Cao
Tsinghua University
Communication channelComputer networkComputer scienceReal-time computingFading
299Publications
24H-index
2,334Citations
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Publications 257
Newest
#1Bo Bai (THU: Tsinghua University)H-Index: 16
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Last. Zhigang Cao (THU: Tsinghua University)H-Index: 24
view all 4 authors...
Device-to-device (D2D) communication has great potential to improve spectrum efficiency and offload traffic for cellular networks. In this paper, we focus on a multiflow two-way D2D network with decode-and-forward (DF) relays, coexisting with OFDMA cellular network. The spectrum sharing and relay selection are considered to minimize the outage probability of the device in D2D networks. The induced problem is a complicated probabilistic integral programming. A novel weighted random bipartite grap...
6 CitationsSource
#1Tian Zhang (SDNU: Shandong Normal University)H-Index: 2
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Last. Zhigang Cao (THU: Tsinghua University)H-Index: 24
view all 3 authors...
Error propagation and noise propagation at the relay node would highly degrade system performance in two-way relay networks. In this paper, we introduce DNF---AF selection two-way relaying scheme which aims to avoid error propagation and mitigate noise propagation. If the relay successfully decodes the exclusive or (XOR) of the messages sent by the two transceivers, it applies denoise-and-forward (DNF). Otherwise, amplify-and-forward (AF) strategy will be utilized. In this way, decoding error pr...
3 CitationsSource
Dec 1, 2014 in GLOBECOM (Global Communications Conference)
#1Bo Bai (THU: Tsinghua University)H-Index: 16
#2Wei Chen (THU: Tsinghua University)H-Index: 8
Last. Zhigang Cao (THU: Tsinghua University)H-Index: 24
view all 3 authors...
Security and privacy issues are becoming more and more important in orthogonal frequency division multiple access (OFDMA) based 4G wireless communication systems. Recently, the security issue was treated from the perspective of physical layer, which mainly focused on improving the average secrecy rate in wireless fading channels. In this paper, the subcarrier allocation problem is considered for secure OFDMA systems. The objective is to minimize the outage probability of each user while guarante...
5 CitationsSource
#1Tian Zhang (SDNU: Shandong Normal University)H-Index: 2
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Last. Zhigang Cao (THU: Tsinghua University)H-Index: 24
view all 4 authors...
In the paper, we consider delay-optimal charging scheduling of the electric vehicles (EVs) at a renewable energy aided charging station with multiple charge points. The uncertainty of the EV arrival, the intermittence of the renewable energy, and the variation of the grid power price are taken into account. In each period, the station determines the number of charging EVs during this period. Meanwhile, it also chooses the amount of renewables used for charging (the rest amount of energy will be ...
1 CitationsSource
#1Tian ZhangH-Index: 3
#2Chen WeiH-Index: 26
Last. Zhigang CaoH-Index: 24
view all 4 authors...
Source
Jun 1, 2014 in ICC (International Conference on Communications)
#1Bo Bai (THU: Tsinghua University)H-Index: 16
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Last. Khaled Ben Letaief (HKUST: Hong Kong University of Science and Technology)H-Index: 66
view all 4 authors...
The green communications, which focus on improving the energy efficiency, have attracted much attention from both academia and industry recently. In this paper, the tradeoff between outage probability and energy efficiency will be addressed for multi-flow cooperative communication systems with taking energy budget and devices energy consumption into consideration. The proposed approach will first formulate the multi-flow cooperative communication system as a weighted random bipartite graph (WRBG...
4 CitationsSource
#1Yunjian Xu (MIT: Massachusetts Institute of Technology)H-Index: 1
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Last. Zhigang Cao (THU: Tsinghua University)H-Index: 24
view all 3 authors...
Power allocation is an important issue for spectrum sharing of unlicensed bands, in which multiple unlicensed systems may coexist and operate. Some recent works have been reported on spectrum sharing in frequency-flat FF unlicensed bands. However, there has not been much work on power allocation for spectrum sharing in frequency-selective FS unlicensed bands. For multiple cooperative systems cooperating on FS interference channels ICs, we study an optimal power allocation strategy, which allows ...
4 CitationsSource
#1Yu RaoH-Index: 1
#2Wei ChenH-Index: 8
Last. Zhigang CaoH-Index: 24
view all 3 authors...
Source
Dec 1, 2013 in GLOBECOM (Global Communications Conference)
#1Juan Liu (NCSU: North Carolina State University)H-Index: 12
#2Huaiyu Dai (NCSU: North Carolina State University)H-Index: 30
Last. Zhigang Cao (THU: Tsinghua University)H-Index: 24
view all 4 authors...
5 CitationsSource
#1Bo Bai (THU: Tsinghua University)H-Index: 16
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Last. Zhigang Cao (THU: Tsinghua University)H-Index: 24
view all 3 authors...
As the energy consumption in information and communication (ICT) systems becomes a more and more important problem, the ICT systems have been being equipped with energy harvesting devices and redesigned from the perspective of energy efficiency. In this paper, a point-to-point communication system with energy harvesting transmitter will be considered in the Rayleigh block-fading channel. In contrast to previous works, the minimum target rate of the considered system must be guaranteed, and both ...
2 CitationsSource
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