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公开(公告)号:US08804598B2
公开(公告)日:2014-08-12
申请号:US12996189
申请日:2009-06-12
申请人: Jianglei Ma , Hang Zhang , Ming Jia , Wen Tong , Hua Xu , Peiying Zhu
发明人: Jianglei Ma , Hang Zhang , Ming Jia , Wen Tong , Hua Xu , Peiying Zhu
CPC分类号: H04L5/0039 , A61K9/2081 , A61K9/209 , A61K9/2886 , A61K9/5026 , A61K9/5073 , A61K9/5084 , A61K31/455 , A61K31/54 , A61K45/06 , H04B7/15542 , H04L5/0007 , H04L5/003 , H04L5/14 , H04L25/20 , H04W52/143 , H04W72/0453 , H04W84/047 , A61K2300/00
摘要: International Mobile Telecommunications (IMT) Advanced technology, also known as 4th Generation (4G) targets to support up to 100 MHz BW. LTE currently supports single carrier bandwidths of up to 20 MHz. The present application describes a multi-carrier approach in which some embodiments of the invention provide a simple solution of aggregating multiple single carrier bandwidths to obtain a wider bandwidth (>20 MHz). Such an approach may extend Long Term Evolution (LTE) bandwidth to greater than that provided by a single carrier, yet maintain full backward compatibility with technologies that predate 4G technology and utilize smaller, single carrier bandwidths. More generally, embodiments of the invention can apply to other communication standards than only LTE.
摘要翻译: 国际移动电信(IMT)先进技术,也被称为第四代(4G)目标,以支持高达100 MHz的BW。 LTE目前支持高达20 MHz的单载波带宽。 本申请描述了多载波方法,其中本发明的一些实施例提供聚合多个单载波带宽以获得更宽带宽(> 20MHz)的简单解决方案。 这种方法可以将长期演进(LTE)带宽扩展到大于由单个载波提供的带宽,但仍然保持与早于4G技术并利用更小的单载波带宽的技术的完全向后兼容性。 更一般地,本发明的实施例可以应用于仅比LTE的其他通信标准。
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公开(公告)号:US20110164491A1
公开(公告)日:2011-07-07
申请号:US13047259
申请日:2011-03-14
申请人: Jianglei Ma , Wen Tong , Ming Jia , Hua Xu , Peiying Zhu , Hang Zhang
发明人: Jianglei Ma , Wen Tong , Ming Jia , Hua Xu , Peiying Zhu , Hang Zhang
IPC分类号: H04J11/00
CPC分类号: H04L27/263 , H04L1/0003 , H04L1/0009 , H04L5/0007 , H04L5/0023 , H04L5/0044 , H04L5/0096 , H04L27/2613 , H04L27/2628 , H04L27/2634 , H04L27/2646
摘要: Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.
摘要翻译: 提供了使OFDM发射机能够用于传输常规OFDM或变换OFDM形式的方法和系统。 提供了一种用于在IFFT之前变换样本的编码和调制序列的技术,其使得能够使用常规OFDM或变换OFDM来发送变换的样本序列。 用于变换样本的编码和调制序列的变换函数的选择可以基于优化发射机和接收机之间的特定操作条件的变换函数。 在本发明的一些实施例中,OFDM和时变OFDM在传输帧中以时间和/或频率被复用。 在本发明的一些实施例中,提供了导频模式,其中使用OFDM发送导频,并且使用OFDM和/或经变换的OFDM发送数据。
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公开(公告)号:US07929407B2
公开(公告)日:2011-04-19
申请号:US11909567
申请日:2006-03-30
申请人: Jianglei Ma , Wen Tong , Ming Jia , Hua Xu , Peiying Zhu , Hang Zhang
发明人: Jianglei Ma , Wen Tong , Ming Jia , Hua Xu , Peiying Zhu , Hang Zhang
CPC分类号: H04L27/263 , H04L1/0003 , H04L1/0009 , H04L5/0007 , H04L5/0023 , H04L5/0044 , H04L5/0096 , H04L27/2613 , H04L27/2628 , H04L27/2634 , H04L27/2646
摘要: Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.
摘要翻译: 提供了使OFDM发射机能够用于传输常规OFDM或变换OFDM形式的方法和系统。 提供了一种用于在IFFT之前变换样本的编码和调制序列的技术,其使得能够使用常规OFDM或变换OFDM来发送变换的样本序列。 用于变换样本的编码和调制序列的变换函数的选择可以基于优化发射机和接收机之间的特定操作条件的变换函数。 在本发明的一些实施例中,OFDM和时变OFDM在传输帧中以时间和/或频率被复用。 在本发明的一些实施例中,提供了导频模式,其中使用OFDM发送导频,并且使用OFDM和/或经变换的OFDM发送数据。
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公开(公告)号:US20110075651A1
公开(公告)日:2011-03-31
申请号:US12995206
申请日:2009-06-12
申请人: Ming Jia , Jianglei Ma , Peiying Zhu , Wen Tong , Hua Xu , Hang Zhang
发明人: Ming Jia , Jianglei Ma , Peiying Zhu , Wen Tong , Hua Xu , Hang Zhang
IPC分类号: H04B7/208
CPC分类号: H04L5/0058 , H04B7/0602 , H04B7/0671 , H04B7/2621 , H04J11/00 , H04L1/0003 , H04L1/0625 , H04L5/0007 , H04L5/0023 , H04L5/0044 , H04L5/0048 , H04L5/0091 , H04L27/2615 , H04L27/2626 , H04L27/2636
摘要: The present application provides methods, devices and transmitters that mitigate increases in peak to average power ratio (PAPR) from transmission diversity in a single carrier frequency division multiple access (SC-FDMA) modulated uplink A PAPR preserving precode matrix hopping method that utilizes cyclic shift delays is provided, as well as a sub-band based transmit diversity scheme. The present application also provides methods, devices and transmitters that relax the scheduling restrictions associated with uplink scheduling in the LTE standard.
摘要翻译: 本申请提供了在单载波频分多址(SC-FDMA)调制上行链路PAPR保持预编码矩阵跳频方法中减轻峰均功率比(PAPR)从传输分集增加的方法,装置和发射机,其利用循环移位 提供延迟,以及基于子带的发射分集方案。 本申请还提供了放宽与LTE标准中的上行链路调度相关联的调度限制的方法,设备和发射机。
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公开(公告)号:US20080186843A1
公开(公告)日:2008-08-07
申请号:US11909567
申请日:2006-03-30
申请人: Jianglei Ma , Wen Tong , Ming Jia , Hua Xu , Peiying Zhu , Hang Zhang
发明人: Jianglei Ma , Wen Tong , Ming Jia , Hua Xu , Peiying Zhu , Hang Zhang
CPC分类号: H04L27/263 , H04L1/0003 , H04L1/0009 , H04L5/0007 , H04L5/0023 , H04L5/0044 , H04L5/0096 , H04L27/2613 , H04L27/2628 , H04L27/2634 , H04L27/2646
摘要: Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM.
摘要翻译: 提供了使OFDM发射机能够用于传输常规OFDM或变换OFDM形式的方法和系统。 提供了一种用于在IFFT之前变换样本的编码和调制序列的技术,其使得能够使用常规OFDM或变换OFDM来发送变换的样本序列。 用于变换样本的编码和调制序列的变换函数的选择可以基于优化发射机和接收机之间的特定操作条件的变换函数。 在本发明的一些实施例中,OFDM和时变OFDM在传输帧中以时间和/或频率被复用。 在本发明的一些实施例中,提供了导频模式,其中使用OFDM发送导频,并且使用OFDM和/或经变换的OFDM发送数据。
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公开(公告)号:US08687480B2
公开(公告)日:2014-04-01
申请号:US12995206
申请日:2009-06-12
申请人: Ming Jia , Jianglei Ma , Peiying Zhu , Wen Tong , Hua Xu , Hang Zhang
发明人: Ming Jia , Jianglei Ma , Peiying Zhu , Wen Tong , Hua Xu , Hang Zhang
CPC分类号: H04L5/0058 , H04B7/0602 , H04B7/0671 , H04B7/2621 , H04J11/00 , H04L1/0003 , H04L1/0625 , H04L5/0007 , H04L5/0023 , H04L5/0044 , H04L5/0048 , H04L5/0091 , H04L27/2615 , H04L27/2626 , H04L27/2636
摘要: The present application provides methods, devices and transmitters that mitigate increases in peak to average power ratio (PAPR) from transmission diversity in a single carrier frequency division multiple access (SC-FDMA) modulated uplink A PAPR preserving precode matrix hopping method that utilizes cyclic shift delays is provided, as well as a sub-band based transmit diversity scheme. The present application also provides methods, devices and transmitters that relax the scheduling restrictions associated with uplink scheduling in the LTE standard.
摘要翻译: 本申请提供了在单载波频分多址(SC-FDMA)调制上行链路PAPR保持预编码矩阵跳频方法中减轻峰均功率比(PAPR)从传输分集增加的方法,装置和发射机,其利用循环移位 提供延迟,以及基于子带的发射分集方案。 本申请还提供了放宽与LTE标准中的上行链路调度相关联的调度限制的方法,设备和发射机。
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公开(公告)号:US08331465B2
公开(公告)日:2012-12-11
申请号:US12064566
申请日:2006-08-22
申请人: Jianglei Ma , Ming Jia , Hua Xu , Wen Tong , Peiying Zhu , Dong-Sheng Yu , Hang Zhang
发明人: Jianglei Ma , Ming Jia , Hua Xu , Wen Tong , Peiying Zhu , Dong-Sheng Yu , Hang Zhang
IPC分类号: H04K1/10
CPC分类号: H04L27/2611 , H04B7/06 , H04B7/08 , H04L5/0007 , H04L5/0023 , H04L25/0226 , H04L25/0232 , H04L27/2626 , H04L27/2647
摘要: A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).
摘要翻译: 一种用于改善OFDM通信系统内的信道估计的方法和装置。 OFDM中的信道估计通常借助于导频符号来执行。 导频符号通常在时间和频率上间隔开。 将导频符号插入的频率和时间的集合称为导频模式。 在一些情况下,导频图案是对角线形格子,规则的或不规则的。 该方法首先在较大相干性(时间或频率)的方向内插。 使用这些测量,导频符号在更快变化方向上的密度将增加,从而改善信道估计而不增加开销。 因此,第一内插步骤的结果然后可以用于辅助尺寸较小的相干性(时间或频率)的内插。
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公开(公告)号:US08111763B2
公开(公告)日:2012-02-07
申请号:US11910091
申请日:2006-03-30
申请人: Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Hua Xu , Hang Zhang , Mo-Han Fong
发明人: Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Hua Xu , Hang Zhang , Mo-Han Fong
IPC分类号: H04L27/28
CPC分类号: H04J13/0003 , H04B1/707 , H04B7/0404 , H04B7/0678 , H04J13/00 , H04J13/16 , H04L5/0016 , H04L5/0026 , H04L5/0048 , H04L5/005 , H04L25/0204 , H04L25/0226 , H04L25/0232 , H04L25/03866 , H04L27/2613 , H04L27/2627 , H04W72/044
摘要: In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions.
摘要翻译: 在本发明的一些实施例中,OFDM符号作为多个簇发送。 在多个OFDM符号持续时间内,群集包括频率上的多个OFDM子载波。 每个簇包括数据以及作为信道估计的参考信号的导频信息。 在一些实施例中,多个集群共同地占用用于传输的频域中的可用子载波集合。 在本发明的一些实施例中,使用码分多路复用(CDM)在每个簇内扩展数据和/或导频。 在一些实施例中,通过在OFDM码元持续时间的其余部分上分配关于多个OFDM符号持续时间的特定数目和导频上的数据来分离导频和数据。 可以在时间和/或频率方向上执行CDM扩展。
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公开(公告)号:US07924935B2
公开(公告)日:2011-04-12
申请号:US11663946
申请日:2005-09-29
申请人: Wen Tong , Jianglei Ma , Ming Jia , Peiying Zhu , Hang Zhang , Dongsheng Yu , Hua Xu
发明人: Wen Tong , Jianglei Ma , Ming Jia , Peiying Zhu , Hang Zhang , Dongsheng Yu , Hua Xu
CPC分类号: H04L1/0026 , H04B7/0413 , H04B7/0619 , H04B7/0669 , H04B7/0697 , H04L1/0675 , H04L5/0007 , H04L5/0032 , H04L5/0048 , H04L5/0057 , H04L25/0204 , H04L25/0224 , H04L27/2602
摘要: Method and apparatus for determining a downlink channel response in an orthogonal frequency division multiplexing access (OFDMA) system. The method and apparatus uses the uplink quality indication channel for determining the downlink channel response, or uses round trip pilot relay channel sounding. The uplink quality indication channel may comprise modified mini-tiles. The subscriber station using round trip pilot relay channel sounding sends composite transponder pilots after receiving the DL pilots.
摘要翻译: 用于确定正交频分复用接入(OFDMA)系统中的下行链路信道响应的方法和装置。 该方法和装置使用上行链路质量指示信道来确定下行链路信道响应,或者使用往返导频中继信道发声。 上行链路质量指示信道可以包括经修改的微瓦。 在接收到DL飞行员之后,使用往返导频中继信道探测的用户站发送复合应答器导频。
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公开(公告)号:US09271221B2
公开(公告)日:2016-02-23
申请号:US11630391
申请日:2005-06-22
申请人: Wen Tong , Ming Jia , Jianglei Ma , Peiying Zhu , Hua Xu , Dong-Sheng Yu , Hang Zhang , Mo-Han Fong
发明人: Wen Tong , Ming Jia , Jianglei Ma , Peiying Zhu , Hua Xu , Dong-Sheng Yu , Hang Zhang , Mo-Han Fong
CPC分类号: H04B7/0478 , H04B7/0413 , H04B7/0617 , H04B7/0619 , H04B7/0671 , H04B7/0673 , H04B7/0691 , H04L5/0007 , H04L5/0023 , H04L5/0028 , H04L5/005 , H04L5/006 , H04L5/023 , H04L27/2601 , H04W48/08 , H04W72/042 , H04W72/044 , H04W72/08 , H04W74/06
摘要: Systems and methods for closed loop MIMO (multiple input and multiple output) wireless communication are provided. Various transmit formats including spatial multiplexing and STTD are defined in which vector or matrix weighting is employed using information fed back from receivers. The feedback information may include channel matrix or SVD-based feedback.
摘要翻译: 提供了闭环MIMO(多输入和多输出)无线通信的系统和方法。 定义了包括空间复用和STTD在内的各种发送格式,其中使用从接收机反馈的信息的向量或矩阵加权。 反馈信息可以包括信道矩阵或基于SVD的反馈。
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