OFDM_SYSTEMS

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Partial intersection sphere decoding with weighted voting for sparse rotated V-OFDM systems
《Science China(Information Sciences)》2018年第2期73-85,共13页Qi FENG Xiang-Gen XIA Naitong ZHANG 
supported by National Natural Science Foundation of China(Grant No.61401194);China Scholarship Council(Grant No.201406190083);Program B for Outstanding Ph.D.Candidate of Nanjing University(Grant No.201501B013)
Vector orthogonal frequency division multiplexing（V-OFDM） is a general system that builds a bridge between OFDM and single-carrier frequency domain equalization in terms of intersymbol interference level and receive...
关键词：vector orthogonal frequency division multiplexing sparse multipath channel partial intersection sphere decoding weighted voting diversity order 
Compressed sensing-based time-domain channel estimator for full-duplex OFDM systems with IQ-imbalances
《Science China(Information Sciences)》2017年第8期172-184,共13页Hai YU Feng SHU You YOU Jin WANG Tingting LIU Xiaohu YOU Jinhui LU Jianxin WANG Xiaohua ZHU 
supported in part by National Natural Science Foundation of China(Grant Nos.61271230,61472190,6147210,61501238);Open Research Fund of National Key Laboratory of Electromagnetic Environment,China Research Institute of Radiowave Propagation(Grant No.201500013);Open Research Fund of National Mobile Communications Research Laboratory,Southeast University(Grant No.2013D02);Research Fund for Doctoral Program of Higher Education of China(Gant No.20113219120019)
In full-duplex orthogonal frequency-division multiplexing（OFDM） systems with in-phase and quadrature（IQ） imbalances, a time-domain least squares（TD-LS） channel estimator is proposed for estimating both the sourc...
关键词：full-duplex OFDM IQ imbalance channel estimation TIME-DOMAIN least squares adaptive OMP gradient projection 
Waveform design for higher-level 3D constellation mappings and its construction based on regular tetrahedron cells被引量：2
《Science China(Information Sciences)》2015年第8期8-19,共12页SHI PengFei HUAN Hao TAO Ran 
supported in part by the Ph.D.Programs Foundation of Ministry of Education of China(Grant No.20121101130001);China Academy of Space Technology Key Foundation(Grant No.CAST201215);the Open Research Fund of the Academy of Satellite Application(Grant No.2014CXJJTX05);Open Research fund Program of Key Lab for Spacecraft TT&C and Communication,Ministry of Education,China
In this paper, we propose a generalized method of high-level three dimensional （3D） signal constella- tion mapping based on the most basic 3D structure： regular tetrahedron cells. First, we redefined the waveform d...
关键词：waveform design 3D constellation mapping regular tetrahedron cells OFDM systems wirelesscommunication 
Cyclic delay transmission for unique word OFDM systems被引量：3
《Science China(Information Sciences)》2014年第8期70-78,共9页LIAO Mang XIA XiangGen ZHANG YouGuang 
supported in part by the National Science Foundation (NSF) (Grant No.0964500);National Basic Research Program of China (Grant No.2010CB731803);National Science Foundation for Innovative Research Groups of China (Grant No.61221061)
In this article, we propose a cyclic delay diversity （CDD） transmission scheme for unique word （UW） OFDM system, which is denoted as CDD-UW-OFDM. In our proposed CDD-UW-OFDM system, the first transmit antenna tran...
关键词：MIMO-OFDM systems frequency-selective fading channels cyclic delay diversity （CDD） uniqueword （UW） transmit diversity 
Optimal phase searching of PTS using modified genetic algorithm for PAPR reduction in OFDM systems被引量：4
《Science China(Information Sciences)》2014年第6期50-60,共11页CHEN Zhi ZHANG Shuai YANG Lin JIA YingYing LI ShaoQian 
supported in part by National Natural Science Foundation of China(Grants No.61001088,61370012);Fundamental Research Funds for the Central Universities(Grant No.ZYGX2012J141);Specialized Research Fund for the Doctoral Program of Higher Education(Grant No.20100185120007)
In this paper,a novel genetic algorithm assisted partial transmit sequence（NGA-PTS）is proposed to reduce the peak-to-average power ratio（PAPR）of orthogonal frequency division multiplexing（OFDM）.However,the searc...
关键词：orthogonal frequency division multiplexing（OFDM） genetic algorithm（GA） partial transmit sequences（PTS） peak-to-average power ratio（PAPR） side information（SI） 
An efficient sparse channel estimator combining time-domain LS and iterative shrinkage for OFDM systems with IQ-imbalances被引量：10
《Science China(Information Sciences)》2012年第11期2604-2610,共7页SHU Feng ZHAO JunHui YOU XiaoHu WANG Mao CHEN Qian STEVAN Berber 
supported in part by National Natural Science Foundation of China (Grant Nos. 61172073,61271230);the open research fund of National Mobile Communications Research Laboratory (Grant No.2010D13),Southeast University,China
A time-domain （TD） least square （LS） channel estimator is first proposed to estimate channel parameters of OFDM system with IQ imbalances at both transmitter and receiver. Then, an iterative shrinkage （IS） algor...
关键词：iterative shrinkage TIME-DOMAIN least square IQ imbalance channel estimation 
Blind estimation of multipath delays in OFDM systems被引量：1
《Science China(Information Sciences)》2012年第6期1397-1401,共5页SHENG Bin YOU XiaoHu 
supported by National "Eleventh Five-year" Project of China(Grant No.2009ZX03003-006-03);National Natural Science Foundation of China(Grant No.60902013)
In order to coherently detect the transmitted data symbols,an orthogonal frequency division multi-plexing （OFDM） receiver requires reliable identification and equalization of the experienced wireless multipath fadin...
关键词：multipath delay cyclic prefix OFDM 
Performance analysis of peak cancellation in OFDM systems被引量：2
《Science China(Information Sciences)》2012年第4期789-794,共6页XIAO Yue BAI WenLing DAN LiLin WU Gang LI ShaoQian 
supported by National Basic Research Program of China(Grant No.2007CB310604);International Science & Technology Cooperation Project of Ministry of Science & Technology of China(Grant No.2008DFA11700);National Natural Science Foundation of China(Grant No.60902026)
Peak cancellation is a class of peak-to-average power ratio （PAPR） reduction techniques for orthogohal frequency division multiplexing （OFDM）. It can control the PAPR and out-of-band radiation simultaneously at th...
关键词：OFDM peak cancellation PAPR 
ML integer frequency offset estimation for OFDM systems with null subcarriers:Estimation range and pilot design被引量：8
《Science China(Information Sciences)》2010年第12期2567-2575,共9页SHU Feng BERBER Stevan WANG DongMing ZHANG QinChuan WANG Mao 
supported by the National Natural Science Foundation of China (Grant No. 60702028);the Research Fund of National Mobile Communications Research Laboratory,Southeast University,China (Grant No. 2010D13);the Aeronautics Fund of 8511 Research Institute of China Aerospace Science & Industry Corporation (Grant No. KM04214)
In this paper the estimation range （ERG） of any null subcarriers （NSC） placement is further investigated and sufficient and necessary conditions of an NSC allocation that achieves a full ERG are defined. Then, a p...
关键词：orthogonal frequency division multiplexing （OFDM） null subcarrier estimation range integer carrier frequency offset false detection probability frequency-selective fading 
Pilot-aided channel estimation for CDD-OFDM systems被引量：2
《Science China(Information Sciences)》2010年第2期379-389,共11页FAN JianCun , YIN QinYe & WANG WenJie MOE Key Laboratory for Intelligent Networks and Network Security, Institute of Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China 
supported by the National Natural Science Foundation of China (Grant Nos. 60772095, 60971113);the Doctoral Foundation of Ministry of Education of China (Grant No. 200806980020);the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 60921003)
Cyclic delay diversity （CDD） is a low-complexity transmit diversity technique for coded orthogonal frequency division multiplexing （OFDM）, which transforms a multiple-input channel into an equivalent singleinput c...
关键词：channel estimation cyclic delay diversity OFDM systems cyclic cross-correlation Wiener filter 
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