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1.发明申请Main Synchronization Sequence Design Method for Global Covering Multi-Beam Satellite LTE 有权全球覆盖多波束卫星LTE的主同步序列设计方法公开(公告)号：US20160112973A1
公开(公告)日：2016-04-21
申请号：US14780096
申请日：2013-06-20
Applicant: Southeast University
Inventor： Haiming Wang , Zhuming Deng , Xiqi Gao , Xiaohu You
IPC: H04W56/00
CPC classification number: H04W56/001 , H04J13/0062 , H04L27/2655 , H04L27/2692 , H04W84/06
Abstract: Disclosed is a main synchronization sequence design method for global covering multi-beam satellite LTE, comprising the follow steps: extending a standard Zadoff-Chu sequence to a generalized Zadoff-Chu sequence so as to obtain an initial candidate main synchronization sequence set of more candidate sequences; gradually narrowing down the candidate main synchronization sequence set according to a selection standard of a main synchronization sequence to obtain a final candidate main synchronization sequence set; and obtaining a main synchronization sequence set with optimal eclectic performance and complexity from the final candidate main synchronization sequence set. According to the present invention, a main synchronization sequence with optimal eclectic performance and calculation complexity can be designed for a global covering same-frequency networking multi-beam satellite LTE system.
Abstract translation: 公开了一种全球覆盖多波束卫星LTE的主同步序列设计方法，包括以下步骤：将标准Zadoff-Chu序列扩展到广义Zadoff-Chu序列，以获得更多候选的初始候选主同步序列集 序列; 根据主同步序列的选择标准逐渐缩小候选主同步序列集，以获得最终候选主同步序列集; 并且从最终候选主同步序列集合获得具有最佳折衷性能和复杂性的主同步序列集合。 根据本发明，可以为全球覆盖同频联网多波束卫星LTE系统设计具有最佳折衷性能和计算复杂度的主同步序列。
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公开(公告)号：US12155427B2
公开(公告)日：2024-11-26
申请号：US17762195
申请日：2020-04-22
Applicant: Southeast University
IPC: H04B7/04 , H04B7/0456 , H04B7/08 , H04B17/391 , H04L25/02
Abstract: Disclosed are a method and system for acquiring massive MIMO beam domain statistical channel information. A refined beam domain channel model involved in the disclosed method is based on a refined sampling steering vector matrix. Compared with a traditional DFT matrix-based beam domain channel model, when antenna size is limited, said model is closer to a physical channel model, and provides a model basis for solving the problem of the universality of massive MIMO for various typical mobile scenarios under a constraint on antenna size. The present invention provides a method for acquiring massive MIMO refined beam domain a priori statistical channel information and a posteriori statistical channel information, the a posteriori statistical channel information comprising mean and variance information of the a posteriori channel. The method of the present invention has low complexity, can be applied to an actual massive MIMO system, provides support for a robust precoding transmission method, and has large application value.
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公开(公告)号：US11658711B2
公开(公告)日：2023-05-23
申请号：US17597778
申请日：2020-12-21
Applicant: SOUTHEAST UNIVERSITY
Inventor： Xiqi Gao , Xianglong Yu , Anan Lu
IPC: H04B7/04 , H04B7/0456 , H04B17/391 , H04B7/22 , H04L27/26
CPC classification number: H04B7/0456 , H04B7/22 , H04B17/391 , H04L27/2602
Abstract: The present disclosure relates to a skywave large-scale MIMO communication method, model, and system. A skywave communication base station in a short waveband is constructed using a large-scale antenna array, wherein skywave large-scale MIMO communication is carried out between the skywave communication base station and a user terminal in a coverage area by ionospheric reflection. The skywave communication base station determines a spacing of the large-scale antenna array according to a maximum operating frequency, and communicates with the user terminal based on a TDD communication mode, wherein a skywave large-scale MIMO signal is transmitted based on an OFDM modulation mode or a power efficiency improvement modulation mode. The skywave communication base station selects a communication carrier frequency within a short waveband range according to a real-time ionospheric channel characteristic, and adaptively selects an OFDM modulation parameter and a signal frame structure.
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公开(公告)号：US09462599B2
公开(公告)日：2016-10-04
申请号：US14232193
申请日：2013-04-19
Applicant: SOUTHEAST UNIVERSITY
CPC classification number: H04W72/12 , H04B7/04 , H04B7/0617 , H04L5/0005 , H04L5/0007 , H04L5/0048 , H04W72/046 , H04W72/085 , H04W88/08
Abstract: A wireless communication method utilizes a large-scale antenna array, which is deployed at the base station and can be a one-dimensional or two-dimensional array and can form tens of beams over the area covered by the base station. The communications method utilizes beam domain division of spatial resources at the base station side utilizing an analog multi-beam forming network or a digital domain multi-beam forming method. The base station carries out wireless communication with multiple users with the same time frequency resource and with the communications process implemented in the beam domain. Scheduling is accomplished through the utilization of a deterministic unitary matrix to form beams. The unitary matrix is a correlation matrix of interference that includes a channel characteristics mode energy coupling matrix, the beam allocation providing beam sets of different users that are non-overlapping to distinguish users in the beam domain.
Abstract translation: 无线通信方法利用在基站部署的大型天线阵列，并且可以是一维或二维阵列，并且可以在由基站覆盖的区域上形成数十个波束。 通信方法利用模拟多波束形成网络或数字域多波束形成方法在基站侧利用空间资源的波束域划分。 基站与同一时间频率资源的多个用户进行无线通信，并在波束域中实现通信过程。 通过利用确定性酉矩阵来形成波束来实现调度。 酉矩阵是包括信道特征模式能量耦合矩阵的干扰相关矩阵，波束分配提供不重叠以区分波束域中的用户的不同用户的波束组。
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公开(公告)号：US20150334726A1
公开(公告)日：2015-11-19
申请号：US14232193
申请日：2013-04-19
Applicant: SOUTHEAST UNIVERSITY
CPC classification number: H04W72/12 , H04B7/04 , H04B7/0617 , H04L5/0005 , H04L5/0007 , H04L5/0048 , H04W72/046 , H04W72/085 , H04W88/08
Abstract: The present invention provides a wireless communication method that utilizes large-scale antenna array. The method comprises: deploying a large-scale antenna array at the base station side wherein, the antenna array can be an one-dimensional or two-dimensional array, and can form tens of beam coverage over the area covered by the base station; accomplishing beam domain division of spatial resources at the base station side with an analog multi-beam forming network or a digital domain multi-beam forming method, wherein, the base station carries out wireless communication with multiple users with the same time-frequency resource, and the communication process is implemented in the beam domain; each user uses a different time-frequency resource to transmit detection signals; the base station obtains the beam domain long-time channel information of each user according to the received detection signals, to determine users that can communicate with the same time-frequency resource and allocate an corresponding beam set for each user; each user communicates with the base station on the selected beam set, wherein, the beam sets occupied by the users communicating with the same time-frequency resource have no overlap among them; pilot frequency signals from different users don't have to be orthogonal to each other, and the pilot frequency can be reused among the space division users.
Abstract translation: 本发明提供一种利用大型天线阵列的无线通信方法。 该方法包括：在基站侧部署大型天线阵列，其中天线阵列可以是一维或二维阵列，并且可以在由基站覆盖的区域上形成数十个波束覆盖; 利用模拟多波束形成网络或数字域多波束形成方法在基站侧实现空域资源的波束域划分，其中基站与具有相同时频资源的多个用户进行无线通信， 并且通信过程在波束域中实现; 每个用户使用不同的时频资源来发送检测信号; 基站根据接收到的检测信号获取每个用户的波束长时间信道信息，以确定可以与相同时间频率资源通信的用户，并为每个用户分配相应的波束组; 每个用户在所选择的波束组上与基站进行通信，其中，与相同的时间 - 频率资源通信的用户占用的波束组在它们之间没有重叠; 来自不同用户的导频信号不必彼此正交，导频可以在空分用户之间重用。
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Patent Agency Ranking
公开(公告)号：US11954681B2
公开(公告)日：2024-04-09
申请号：US17617577
申请日：2020-06-16
Applicant: SOUTHEAST UNIVERSITY
Inventor： Xintong Ling , Yuwei Le , Bowen Zhang , Jiaheng Wang , Xiqi Gao
CPC classification number: G06Q20/401 , G06Q20/3825 , H04L9/50 , H04W12/08 , H04W12/122 , G06Q2220/00
Abstract: A blockchain-enhanced open Internet of Things (IoT) access architecture includes an access point, a number of IoT devices, a hash access mechanism, a blockchain mining network, and a blockchain enabling mechanism that manages network access of the IoT device. The blockchain-enhanced open IoT access architecture provided in the present invention provides a secure, reliable, fair, and short-packet access service for a plurality of devices in an IoT network by using features of a blockchain such as distributed storage, tamper-proofing, and traceability, thereby promoting the trust and cooperation between the devices and ensuring the security and efficiency of the network in the large-scale untrustworthy IoT network. The blockchain-enhanced open IoT access architecture in the present invention can provide secure and reliable IoT access with low latency and a high value in practice.
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公开(公告)号：US11139908B2
公开(公告)日：2021-10-05
申请号：US16302676
申请日：2017-09-22
Applicant: SOUTHEAST UNIVERSITY
Abstract: The invention discloses a beam domain optical wireless communication method and system. A base station is equipped with an array of optical transceiver ports or transmitter/receiver ports and a lens, each optical transceiver port forms a beam with centralized energy through the lens, and the base station generates beams in different directions by using the optical transceiver port array and the lens, thereby realizing multi-beam coverage or large-scale beam coverage in a communication region. The base station transmits/receives signals of multiple or a large number of user terminals by using channel state information of each user terminal, and different optical transceiver ports transmit/receive signals in different directions, thereby realizing simultaneous communication and bidirectional communication between the base station and different user terminals.
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公开(公告)号：US10541850B2
公开(公告)日：2020-01-21
申请号：US15744909
申请日：2016-10-31
Applicant: SOUTHEAST UNIVERSITY
Inventor： Xiqi Gao , Li You , Wenjin Wang
IPC: H04L27/26 , H04B7/0408 , H04B7/0413 , H04B7/06 , H04W56/00 , H04B7/01 , H04L5/00
Abstract: Signal transmitting/receiving electronic devices or terminals in the present disclosure are configured to conduct per-beam signal synchronization in massive MIMO communication with a signal receiving/transmitting device or base station. During the massive MIMO communication, the devices or terminals are configured to transmit/receive signals via a set of beams to or from the signal receiving/transmitting device or base station. For beam domain signal of each individual beam of the plurality beams, the devices or terminals are configured to determine target time adjustments based on time shifts of the beam domain signals induced by multipath effect and target frequency adjustments based on frequency offsets of the beam domain signals induced by the Doppler effect; adjust time independent variables of the beam domain signals by the time adjustments; and adjust frequency independent variables of the beam domain signals by the frequency adjustments. Further, per-beam synchronized BDMA massive MIMO transmission method is disclosed, which provides a solution to efficient and reliable wireless communications with high mobility and/or high carrier frequency.
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公开(公告)号：US11419068B2
公开(公告)日：2022-08-16
申请号：US17256656
申请日：2020-02-20
Applicant: SOUTHEAST UNIVERSITY
Inventor： Xiqi Gao , Li You , Xu Chen , Yufei Huang , Xueyuan Shi , Siran He , Wenjin Wang
IPC: H04W52/42 , H04B7/0452 , H04W56/00 , H04W72/04
Abstract: A large-scale MIMO (Multiple-Input Multiple-Output) wireless transmission method for millimeter wave/Terahertz networks is provided. In order to reduce the interruption of propagation in the millimeter wave/Terahertz band, a plurality of cells are combined into a wireless transmission network, the base station in each cell is equipped with a large-scale antenna array, and a unitary transformation matrix is used to achieve large-scale beam coverage for user terminals in the entire network. Moreover, in order to reduce the influence of the multipath and Doppler effects on transmission performance, received signals are synchronized for time and frequency in each receiving beam of a user terminal. The method allocates power for signal transmission according to the statistic information of synchronized equivalent channels, and gives an optimal power allocation matrix by iterative solution based on the CCCP (concave-convex procedure) and the deterministic equivalent method.
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公开(公告)号：US11177863B2
公开(公告)日：2021-11-16
申请号：US16643560
申请日：2017-10-16
Applicant: SOUTHEAST UNIVERSITY
IPC: H04B1/04 , H04B7/0456 , H04B7/0417
Abstract: A massive multiple-input multiple-output (MIMO) robust precoding transmission method under imperfect channel state information (CSI), wherein the imperfect CSI obtained by the base station (BS) side of the massive MIMO system is modeled as an a posteriori statistical channel model including channel mean and channel variance information. The model considers the effects of channel estimation error, channel aging and spatial correlation. The BS performs the robust precoding transmission by using the a posteriori statistical channel model, so that the universality problem of the massive MIMO to various typical moving scenarios can be solved, and high spectral efficiency is achieved.
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