Compensation of Linear Multiscale Doppler for OFDM-Based Underwater Acoustic Communication Systems by A. E. Abdelkareem, B. S. Sharif, C. C. Tsimenidis, J. A. Neasham

“…The first method employed to achieve an estimate of this particular parameter is based upon centroid localization and this prediction is reinforced by a second technique which utilises linear prediction, based on the assumption that the speed changes linearly during the OFDM symbol time. Subsequently, the two estimations of the symbol timing offset parameter are smoothed in order to obtain a fine tuned approximation of the Doppler scale. …”
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基于导频的OFDM信道估计及其研究进展 by 张继东, 郑宝玉

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Research on the algorithm for reducing the PAPR of OFDM system based on quantum chaotic mapping by Yingjie MA, Geng ZHAO, Zhanzhen WEI, Zhaobin LI, Lei JU

Subjects: “…OFDM…”
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PAPR Reduction Using Fireworks Search Optimization Algorithm in MIMO-OFDM Systems by Lahcen Amhaimar, Saida Ahyoud, Ali Elyaakoubi, Abdelmoumen Kaabal, Kamal Attari, Adel Asselman

“…The transceiver combination technology, of orthogonal frequency division multiplexing (OFDM) with multiple-input multiple-output (MIMO), provides a viable alternative to enhance the quality of service and simultaneously to achieve high spectral efficiency and data rate for wireless mobile communication systems. …”
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低复杂度的OFDM粗频偏估计算法 by 刘占利, 曾嵘, 赵春明

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Optimal downlink power allocation schemes for OFDM-NOMA-based Internet of things by Ya Gao, Fei Yu, Haoran Zhang, Yongpeng Shi, Yujie Xia

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Resource Allocation Algorithm for the Downlink of Multi-User OFDM System with Optimized Fairness by Limei Tang, Haiyan Cao, Jun Li, Shiyi Xie

Subjects: “…OFDM…”
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Sparse channel fast reconstruction algorithm for OFDM system based on IOC-CSMP by Wei CUI, Ying YU, Haixia YU, Chao CHEN, Yunpeng LI

“…A fast reconstruction algorithm based on inner product optimization and sparsity updating constraint was proposed for OFDM system channel estimation when the number of channel paths was unknown.By constructing and updating the selection vector, the inner product operation was reduced by using the atoms corresponding to the non-zero index of the selection vector.The atoms were optimized based on compressed sampling and backtracking strategies, and the channel estimation was completed by matching pursuit.The sparsity update and the stop condition for the algorithm was achieved by the energy difference between the two adjacent channel estimation so as to ensure fast convergence of the algorithm.The simulation results show that the proposed algorithm has better channel estimation performance than the least square algorithm, minimum mean square error algorithm, sparsity adaptive matching pursuit algorithm and adaptive regularized compressed sampling matching pursuit algorithm, and consumes less channel estimation time than the two adaptive methods.…”
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基于多带OFDM的超宽带通信系统 by 张士兵, 张力军, 徐晨

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Novel restructuring method for CP-based LS channel estimation in OFDM system by Wang-xing ZHAO, Qun WAN, Zhang-xin CHEN

“…A restructuring method for least square (LS) channel est ation using cyclic-prefix frequency sequences (CPFS) in orthogonal frequency division multiplexing (OFDM) system was proposed. The restructuring method was based on the relationship of CPFS and comb-pilots which made a higher LS channel estimation precision. …”
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Design and Implementation of High Frequency Broadband Gbit/s System Based on MIMO-OFDM by Junyu Peng, Sunzeng Cai, Zhenghang Zhu, Jing Xu, Ting Zhou

“…Spectrum bands below 6 GHz have been crowded currently,but demand for high speed wireless communication in low speed environment is growing.Research and development of high-frequency wireless communication system is an important way to alleviate this problem.System structure for high frequency broadband communication was proposed.Physical layer key algorithm such as synchronization,channel estimation and MIMO detection was described briefly.The high frequency broadband Gbit/s system based on MIMO-OFDM was implemented on FPGA based hardware platform.Bandwidth and data rate of the system was tested in indoor environment.Test result shows that performance of the system conforms to design requirements.…”
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Simple scheme combining space-time coded OFDM with multi-dimension beamforming by HUANG Yong-ming, YANG Lv-xi

Subjects: “…MIMO-OFDM…”
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Transceiver design and performance analysis for uplink SCMA based on CP-free OFDM by Li ZHOU, Xiqing LIU

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Resource assignments algorithm based on energy efficiency optimization in OFDM relay networks by Yun LI, Hai-xia DUAN, Kai-rong SU, Bin CAO

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Pilot Design for Sparse Channel Estimation in Large-Scale MIMO-OFDM System by Chao Xu, Jianhua Zhang, Mengmeng Liu, Changchuan Yin

“…The pilot design problem in large-scale multi-input-multioutput orthogonal frequency division multiplexing (MIMO-OFDM) system is investigated from the perspective of compressed sensing (CS). …”
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YAZILI BASINDA FOTOĞRAF DIŞINDA KULLANILAN GÖRSEL ÖGELER: GRAFİKLER VE İLLUSTRASYONLAR by Feyyaz Bodur

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Resource allocation algorithm based on the multi-relay decoding-and-forwarding in OFDM system by Tao GUO, Youming LI, Ting LI, Yuzhi YAN

Subjects: “…OFDM…”
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利用训练帧进行OFDM系统同步的新算法 by 周一青, 胡爱群

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Study on RF module in UHF OFDM node for mobile multimedia sensor network by PANG Rui-fan, JIANG Jian, WANG Ying-guan, ZHANG Hong-jun, LIU Hai-tao

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Switching MIMO System with Adaptive OFDM Modulation for Indoor Visible Light Communication by Xinyue Guo, Keer Zhang, Xufa Huang

“…The adaptive OFDM modulation, which is realized by power and bit allocation on OFDM subchannels, is utilized to achieve the maximum channel capacity under a given target bit error rate (BER). …”
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