Iterative rake equalization method for low-complexity OTSM in high-speed mobile environment by Guojun LI, Kun LONG, Changrong YE, Jiawen LIANG

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Iterative interference cancellation based on decoding algorithm of space-time block coding in frequency-selective fading by DONG Tao, YOU Xiao-hu

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Novel direct sequence spread spectrum communication method by Fanglin GU, Jinlin PENG, Yuzhen HUANG, Shengqun CAO, Haitao ZHAO, Jibo WEI

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Performance analysis of space-time block-coded multitone CDMA system by YANG Wei1, WANG Xin-sheng1

“…A space-time block-coded multitone code-division multiple-access（STBC MT-CDMA） system was proposed.The uplink bit error rate（BER） performance of the proposed system with maximum ratio combining（MRC） was theoretically analyzed in a multipath fading channel and the corresponding BER expressions were derived,which was verified through simulations.Numerical results show that the BER performance,error floor and capacity of the proposed system are improved significantly due to the joint space-time and path gain.…”
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Energy efficiency joint optimization algorithm for low-precision ADC massive MIMO systems by Haiyan CAO, Wenjuan HU, Yingjuan ZHI, Fangmin XU, Xin FANG

“…An uplink energy efficiency optimization algorithm based on alternating optimization algorithm was proposed for large-scale multiple-input multiple-output (MIMO) systems with low-precision analog to digital converters (ADC).That is,based on the maximum ratio combining (MRC) reception,an optimization model aiming at maximizing energy efficiency was established,and then the original fractional form optimization problem was converted into an equivalent subtractive form according to the nature of the fractional programming.In the case where the number of quantization bits was constant,the iterative optimization of the transmission power and the pilot length were performed.Simulation results show that the proposed algorithm has better spectral efficiency and energy efficiency.…”
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High-Rate Redundant Space-Time Coding by Jawad Manssour, Afif Osseiran, Slimane Ben Slimane

“…A complementary low-complexity decoding algorithm based on maximum ratio combining and successive interference cancelation is further proposed. …”
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Energy efficiency joint optimization algorithm for mixed-ADC massive MIMO systems by Haiyan CAO, Zhongliang WANG, Hao XU, Qianhong CHEN, Fangmin XU

“…An energy efficiency optimization algorithm was proposed for the uplink of massive MIMO system with mixed precision analog-to-digital converter (ADC) at the receiver.Based on the maximum ratio combining detection algorithm (MRC), the approximate closed-form expression of system uplink energy efficiency was derived.Firstly, the proportion of high-precision ADC was determined, and then the quantization accuracy of low-resolution ADC, the user’s transmission power and the number of antennas at the base station was taken as the optimization objectives to alternately iterate to obtain the optimal energy efficiency value.Furthermore, the influence on energy efficiency and spectrum efficiency was analyzed by adjusting the proportion of high-precision ADC.The simulation results show that the proposed algorithm has high energy efficiency, and can achieve a better balance between energy efficiency and spectrum efficiency by adjusting the proportion of high-precision ADC.…”
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Performance Analysis of DE-QPSK with Joint Transmit and Receive Diversity in Nakagami Fading by Guangqiu Li, Jiayun Dong

“…By using the statistical average results of higher-order powers of Gaussian Q-function in multi-branch diversity reception with maximum ratio combining（MRC）in Rayleigh fading channel，exact closed-form for the average symbol error rate（ASER）of differentially encoded quadri-phase shift keying（DE-QPSK）using coherent detection with transmit selection combining（SC）and receive MRC（SC/MRC）in Nakagami fading channels was derived.Approximate closed-form for the ASER of DE-QPSK with SC/MRC in Nakagami fading channels was derived by using the approximate expression of Gaussian Q-function and moment generating function based analysis approach.Numerical and simulation results show that the theoretical analysis of the ASER of DE-QPSK is exact and the approximate closed-form for the ASER of DE-QPSK is accurate.The above results can be used to design SC/MRC antenna diversity systems with DE-QPSK.…”
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Outage probability and capacity analysis of distributed MIMO systems over a composite fading channel by Wen-jie PENG, Yue-heng LI, Tuan-jie XUE, Mei-yan JU, Ping HUANG

“…The exact closed-form expressions about the outage probability and capacity of distributed MIMO systems over a composite fading channel are derived firstly by using Lognormal approximation to complicated Gamma-lognormal distribution when mobile station (MS) in the cell is fixed at some position and the so-called maximum ratio transmission/selected combining (MRT-SC) and selected transmission/maximum ratio combining (ST-MRC) schemes are adopted in uplink and downlink respectively.Then based on a newly proposed non-uniform MS cell distribution model,which is more consistent with the MS cell hotspot distribution in an actual communication environment,the average outage probability and capacity formulas synthesizing the MS cell position information are further derived.Finally,the accuracy of the approximation method and the rationality of the corresponding theoretical analysis about the system performance are proven and illustrated by computer simulations.…”
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Error performance of multi-branch dual-hop PF cooperative systems by Guangqiu LI, Jiayun DONG, Tao JIANG

“…Design of multi-branch dual-hop phase-only forward(PF)cooperative systems with continuous phase frequency shift keying(CPFSK)modulation needs to determine the number of branch and modulation index.The usual solution of determining the above parameters is the time-consuming and inefficient computer simulation.An efficient solution of determining these parameters is theoretical analysis method.Semi-analytical expressions for the average bit error rate(ABER)of multi-branch dual-hop PF cooperative systems in conjunction with discrimination detection CPFSK over time-selective Rayleigh fading channels was presented.Two cases with and without antenna selection at the relays and maximum-ratio combining(MRC)receive diversity at the destination were considered.The simulation results show that numerical calculation results and simulation results for the ABERs of PF，discrimination detection,CPFSK cooperative systems are consistent and show that the above ABER theory results of CPFSK cooperative systems can be used to design PF cooperative systems.…”
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A joint optimization algorithm based on energy efficiency maximization for massive MIMO systems by Haiyan CAO, Ruirui FENG, Xin FANG, Xiumin WANG, Fangmin XU

“…For the massive multi-cell multi-input multiple-output (MIMO) communication uplink system with unknown channel status information,a resource allocation algorithm which jointly optimizes the pilot sequence length,pilot symbol power and data symbol power was proposed.With the maximum ratio combining (MRC) receiver,the influence of circuit power was considered,pilot contamination and the constraint of maximum transmission power,and a nonconvex function modeled with the goal of maximizing energy efficiency (EE) was established.Firstly,the fractional form was transformed into an equivalent subtractive form by using the properties of fractional programming and then decomposed into a series of DC problems,finally,by using an iterative optimization algorithm,the three variables were alternately adjusted with maximizing the energy efficiency.Simulation results show that with the increasing of the maximum symbol transmission power,the proposed scheme can still have the great EE performance for the massive MIMO systems.…”
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Outage performance of multi-relay collaborative NOMA systems supporting multiple multicast services by Yifei CHU, Xinjie YANG

“…A cooperative non-orthogonal multiple access (NOMA) system was proposed to support unicast primary user and multiple multicast services based on multiple relays strategy.Under the Rayleigh channel, the secondary user with the best channel condition from each multicast group was selected as full-duplex relay to decode and forward the unicast primary user’s signal, and the primary user employed the maximum ratio combining (MRC) technique to improve the signal to interference and noise ratio (SINR).The closed-form expressions for the outage probability of primary user in full-duplex and half-duplex modes with multi-relay simultaneous forwarding (MRSF) and optimal relay forwarding (ORF) were derived and verified by Monte Carlo simulations.The results verify that full-duplex relay outperforms half-duplex relay scheme.Furthermore, with same number of multicast groups, the MRSF strategy effectively improve the unicast primary user outage performance, in comparison with ORF strategy, when the number of multicast groups increases, the improvement becomes more significant.…”
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Performance analysis of orthogonal signals with TASP/MRC diversity by Guangqiu LI, Siting WANG

“…In order to solve the design problem of predictive transmit antenna selection (TASP) / receive antenna maximum ratio combining (MRC) wireless communication system with the minimum mean square error (MMSE) channel prediction,exact and approximate closed-forms for the average symbol error rate (ASER) of M-ary ortho-gonal and biorthogonal signals with coherent detection and TASP/MRC over Rayleigh block fading channel were de-rived by using parabolic cylinder function,the approximate expression of Gaussian Q-function and moment generat-ing function (MGF) based analysis approach respectively.Numerical and simulation results show that the theoretical analysis of the ASERs of orthogonal and biorthogonal signals is exact and the approximate closed-form for the ASER of orthogonal signals is accurate.The above exact or/and approximate closed-forms of ASER of orthogonal and biortho-gonal signals with coherent detection and TASP/MRC can be used to determine the number of antennas of transmitter and receiver and the parameters of predictor quickly,instead of the time-consuming and inefficient computer simulation.…”
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First-Order Statistical Characteristics of Macrodiversity System with Three Microdiversity MRC Receivers in the Presence of k-µ Short-Term Fading and Gamma Long-Term Fading by Branimir Jaksic, Mihajlo Stefanovic, Danijela Aleksic, Dragan Radenkovic, Sinisa Minic

“…Macrodiversity system with macrodiversity SC receiver and three microdiversity MRC (maximum ratio combining) receivers is considered. Independent k-μ short-term fading and correlated Gamma long-term fading are present at the inputs of microdiversity MRC receivers. …”
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Design and performance analysis of energy efficiency based CR primary user emulation attack defensive scheme by Yunchuan WANG, Xiaorong XU, Yingbiao YAO, Weiwei WU

“…Energy efficiency based PUEA defensive scheme was investigated with performance analysis.In this scheme,CSS energy efficiency was constructed as the optimum objective in the presence of PUEA with secure detection probability and false alarm probability threshold as the constraint conditions.Secure CSS model and PUEA defensive scheme were proposed to achieve energy efficiency based secure CSS.K-out-of-N criterion is set as global decision criterion in the scheme.Optimal fusion threshold K and optimal cooperative SUs N can be determined in secure CSS with the guarantee of energy efficiency.Compared with the traditional maximum ratio combining (MRC) fusion rule,the proposed PUEA defensive scheme not only guarantees system energy efficiency,but also improves system detection performance.Namely,the proposed scheme makes a trade-off between energy efficiency and detection performance in the presence of PUEA.The numerical simulation results show that the proposed strategy is not affected by the PUE interference power,and it has a high degree of persistence for PUEA attack.…”
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Research on Performance of Fiber-Based Multiple Apertures Receiver System with PPM Modulation by Kangning LI, Xu FENG, Jianwen GAO, Jing Ma

“…The performance of fi ber-based FSO with multiple apertures receiver system was studied for pulse position modulation (PPM) .Expressions of PPM modulated signal-to-noise ratio (SNR) and bit-error rate (BER) for fi ber-based FSO multiple apertures receiver system were presented based on the probability density function of Gamma-Gamma intencity distribution and non–central chisquare fi ber coupling effi ciency distribution under atmospheric infl uence.Selection combining (SC), equal gain combining (EGC) and maximum ratio combining (MRC) were considered to be three signal combining methods for multiple apertures receiver system.The BER performance of 4PPM modulted SC, EGC and MRC fi ber-based multiple apertures receiver system and single aperture receiver system with the same total aperture area were comparative analyzed by Monte Carlo simulation.The BER performance of fi ber-based multiple apertures receiver systems in 4PPM and 8PPM modulation modes were directly compared for diff erent combining methods.…”
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Performance Analysis of Large-Scale Digital Phased Array Mixed-ADC Receiver in Compact Space by ZHANG Yi, GAO Hang, MA Song, GUO Hongru, XIA Bin, ZHANG Chaoxian

“…Then, used a linear maximum ratio combining receiver and based on random matrix theory, a closed form expression for the achievable rate of the system under a given antenna array topology was derived. …”
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Energy Detection in Multihop Cooperative Diversity Networks: An Analytical Study by M. O. Mughal, L. Marcenaro, C. S. Regazzoni

“…In particular, upper bound average detection probability expressions are obtained for three scenarios: (i) multihop cooperative relay communication; (ii) multi-hop cooperative relay communication with direct link and maximum ratio combiner (MRC) at destination; and (iii) multi-hop cooperative relay communication with direct link and selection combiner (SC) at destination. …”
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