Cooperative communication can achieve spatial diversity gains,and consequently combats signal fading due to multipath propagation in wireless networks powerfully.A novel complex field network-coded cooperation（CFNCC...Cooperative communication can achieve spatial diversity gains,and consequently combats signal fading due to multipath propagation in wireless networks powerfully.A novel complex field network-coded cooperation（CFNCC） scheme based on multi-user detection for the multiple unicast transmission is proposed.Theoretic analysis and simulation results demonstrate that,compared with the conventional cooperation（CC） scheme and network-coded cooperation（NCC） scheme,CFNCC would obtain higher network throughput and consumes less time slots.Moreover,a further investigation is made for the symbol error probability（SEP） performance of CFNCC scheme,and SEPs of CFNCC scheme are compared with those of NCC scheme in various scenarios for different signal to noise ratio（SNR） values.展开更多
In this paper, we propose cooperative relay networks with non-orthogonal multiple access in order to design a near-optimal power allocation strategy. Like other next generation wireless technologies, spatially multipl...In this paper, we propose cooperative relay networks with non-orthogonal multiple access in order to design a near-optimal power allocation strategy. Like other next generation wireless technologies, spatially multiplexed transmissions are achieved by relay nodes which enables decode-and-forward relaying of a new superposition code after reception from the source. It is worth noting that, since it is hard to exactly prove the proposed PA scheme, due the fact that it is one kind of the approximate conjectures. Therefore, mathematical and numerical methods have been used to clarify the feasibility of the proposal. Numerical results indicate that it is able to asymptotically achieve the optimal sum rate at the higher signal-to-noise ratio region with the proposed strategy applied instead of negligible performance loss.展开更多
The joint optimization of cooperative relays in a multiple-input multiple-output(MIMO)multiple relay aided communication system is discussed in this article.A simple linear optimization solution is designed and a mult...The joint optimization of cooperative relays in a multiple-input multiple-output(MIMO)multiple relay aided communication system is discussed in this article.A simple linear optimization solution is designed and a multiuser scheduling algorithm is proposed.The new algorithm chooses users with larger cooperation diversity gains from the waiting list to serve;it can reduce inter-user interference and maintain space diversity caused by parallel transmission of multiple relays,and achieve higher system throughput.展开更多
基金supported by the National Natural Science Foundation of China(6104000561001126+5 种基金61271262)the China Postdoctoral Science Foundation Funded Project(201104916382012T50789)the Natural Science Foundation of Shannxi Province of China(2011JQ8036)the Special Fund for Basic Scientific Research of Central Colleges (CHD2012ZD005)the Research Fund of Zhejiang University of Technology(20100244)
文摘Cooperative communication can achieve spatial diversity gains,and consequently combats signal fading due to multipath propagation in wireless networks powerfully.A novel complex field network-coded cooperation（CFNCC） scheme based on multi-user detection for the multiple unicast transmission is proposed.Theoretic analysis and simulation results demonstrate that,compared with the conventional cooperation（CC） scheme and network-coded cooperation（NCC） scheme,CFNCC would obtain higher network throughput and consumes less time slots.Moreover,a further investigation is made for the symbol error probability（SEP） performance of CFNCC scheme,and SEPs of CFNCC scheme are compared with those of NCC scheme in various scenarios for different signal to noise ratio（SNR） values.
基金partly supported by the research funds of the National Natural Science Foundation of China (NO. 61371113, 61401241)the research funds of Chonbuk National University in 2017BK-21 of Korea and the Nantong University-Nantong Joint Research Center for Intelligent Information Technology (KFKT2016B04)
文摘In this paper, we propose cooperative relay networks with non-orthogonal multiple access in order to design a near-optimal power allocation strategy. Like other next generation wireless technologies, spatially multiplexed transmissions are achieved by relay nodes which enables decode-and-forward relaying of a new superposition code after reception from the source. It is worth noting that, since it is hard to exactly prove the proposed PA scheme, due the fact that it is one kind of the approximate conjectures. Therefore, mathematical and numerical methods have been used to clarify the feasibility of the proposal. Numerical results indicate that it is able to asymptotically achieve the optimal sum rate at the higher signal-to-noise ratio region with the proposed strategy applied instead of negligible performance loss.
基金supported by the National Basic Research Program of China (No.2007CB310603)the National Natural Science Foundation of China (Grant Nos.60672093,60496310)the National Hi-Tech Research and Development Program of China (No.2007AA01Z262).
文摘The joint optimization of cooperative relays in a multiple-input multiple-output(MIMO)multiple relay aided communication system is discussed in this article.A simple linear optimization solution is designed and a multiuser scheduling algorithm is proposed.The new algorithm chooses users with larger cooperation diversity gains from the waiting list to serve;it can reduce inter-user interference and maintain space diversity caused by parallel transmission of multiple relays,and achieve higher system throughput.
