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31. 发明授权

US08830816B2 System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design 有权
标题翻译：用于MIMO OFDM通信系统和物理层分组和前导码设计的系统接入和同步方法
公开(公告)号：US08830816B2
公开(公告)日：2014-09-09
申请号：US13487898
申请日：2012-06-04
申请人： Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong
发明人： Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong
IPC分类号： H04J11/00
CPC分类号： H04W36/08 , H04B7/022 , H04B7/04 , H04B7/0413 , H04B7/0667 , H04B7/0697 , H04J11/0069 , H04L5/0023 , H04L5/0037 , H04L5/0048 , H04L7/0008 , H04L27/2602 , H04L27/2607 , H04L27/2613 , H04L27/2627 , H04L27/2628 , H04L27/2663 , H04L27/2665 , H04L27/2672 , H04L27/2675
摘要： A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.
摘要翻译：提供了一种用于在MIMO-OFDM通信系统内执行采集，同步和小区选择的方法和装置。执行粗同步以确定搜索窗口。然后通过测量其第一信号样本位于搜索窗口内的信号样本的子集与已知值之间的相关性来执行精细同步。相关性在接收信号的频域中进行。在多输出OFDM系统中，OFDM发射机的每个天线具有唯一的已知值。已知值作为连续导频符号对发送，每对导频符号在OFDM帧内的子载波频率的相同子集上发送。

32. 发明授权

US08774151B2 Closed-loop MIMO systems and methods 有权
标题翻译：闭环MIMO系统和方法
公开(公告)号：US08774151B2
公开(公告)日：2014-07-08
申请号：US13435002
申请日：2012-03-30
申请人： Ming Jia , Jianglei Ma , Wen Tong , Peiying Zhu
发明人： Ming Jia , Jianglei Ma , Wen Tong , Peiying Zhu
IPC分类号： H04W4/00
CPC分类号： H04L5/0048 , H04B7/0417 , H04B7/0456 , H04B7/0634 , H04B7/0639 , H04L5/14 , H04L25/0204 , H04L25/0224 , H04L25/0242 , H04L25/03343 , H04L27/2601 , H04L27/2613 , H04L2025/03426 , H04L2025/03802
摘要： Methods, devices and systems are provided for transmitting and receiving MIMO signals. In one embodiment, transmitting of the MIMO signals involves pre-coding each of at least two data symbols using a respective pre-coding codeword to preclude a corresponding plurality of pre-coded data symbols. A respective signal is transmitted from each of a plurality of antennas, the respective signal including one of the pre-coded signals and at least one pilot for use in channel estimation. The signals collectively further include at least one beacon pilot vector consisting of a respective beacon pilot per antenna, the beacon pilot vector containing contents known to a receiver for use by the receiver in determining the codeword used to pre-code the at least one data signal.
摘要翻译：提供了发送和接收MIMO信号的方法，设备和系统。在一个实施例中，MIMO信号的发送涉及使用相应的预编码码字对至少两个数据符号中的每一个进行预编码，以排除相应的多个预编码数据符号。相应的信号从多个天线中的每一个发送，各个信号包括一个预编码信号和至少一个导频，用于信道估计。信号集体地进一步包括由每个天线的每个信标导频组成的至少一个信标导频向量，信标导频向量包含接收机已知的内容，以供接收机在确定用于对所述至少一个数据信号进行预编码的码字时使用。

33. 发明授权

US08619713B2 Soft handoff for OFDM 有权
标题翻译： OFDM的软切换
公开(公告)号：US08619713B2
公开(公告)日：2013-12-31
申请号：US12983636
申请日：2011-01-03
申请人： Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong , Dong-Sheng Yu
发明人： Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong , Dong-Sheng Yu
IPC分类号： H04W4/00 , H04J11/00 , H04J1/00
CPC分类号： H04W36/18 , H04B7/022 , H04L1/0618 , H04L5/0007 , H04L5/0023 , H04L5/0025 , H04L5/0037 , H04L5/0044 , H04L5/0048 , H04L25/0232 , H04L27/2613 , H04L27/2626 , H04L27/2647 , H04L27/2655
摘要： The present invention relates to soft handoffs in an OFDM system. Each mobile terminal measures pilot signal strengths of transmissions from adjacent base stations. If the pilot signal strength for a base station exceeds the defined threshold, that base station is added to an active set list. Each mobile terminal notifies the base stations of their active set lists. By providing the set list to the base station controller and the servicing base station, the mobile terminal identifies the sole servicing base station or triggers a soft handoff mode when multiple base stations appear on the active set list. The soft handoff mode uses a combination of scheduling and space-time coding to affect efficient and reliable handoffs.
摘要翻译：本发明涉及OFDM系统中的软切换。每个移动终端测量来自相邻基站的传输的导频信号强度。如果基站的导频信号强度超过定义的阈值，则该基站被添加到活动集列表中。每个移动终端向基站通知其活动集列表。通过将设置列表提供给基站控制器和服务基站，移动终端识别唯一服务基站，或者当多个基站出现在活动集列表上时触发软切换模式。软切换模式使用调度和时空编码的组合来影响有效和可靠的切换。

34. 发明授权

US08594247B2 Method and apparatus for channel quality measurements 有权
标题翻译：用于信道质量测量的方法和装置
公开(公告)号：US08594247B2
公开(公告)日：2013-11-26
申请号：US13437066
申请日：2012-04-02
申请人： Ming Jia , Jianglei Ma , Peiying Zhu , Dong-Sheng Yu , Wen Tong
发明人： Ming Jia , Jianglei Ma , Peiying Zhu , Dong-Sheng Yu , Wen Tong
IPC分类号： H03D1/00 , H04L27/06
CPC分类号： H04L1/0631 , H04L1/0003 , H04L1/0009 , H04L1/0036 , H04L1/208 , H04L5/0023 , H04L5/0048 , H04L5/0053 , H04L25/0226 , H04L25/0236 , H04L25/03318 , H04L25/067
摘要： A method and apparatus for measuring channel quality over which has been transmitted a sequence of symbols produced by encoding and constellation mapping a source data element sequence. A sequence of received symbols is received over the channel. The sequence of received symbols is de-mapped based on a first channel quality indicator previously transmitted to a transmitter of the sequence of symbols. The de-mapped symbols are decoded to produce a decoded output sequence. In some embodiments, the decoding may be based on the first channel quality indicator. The decoded output sequence is re-encoded to produce a re-encoded output sequence. The de-mapped symbols are correlated with the re-encoded output sequence to produce a second channel quality indicator. The second channel quality indicator is transmitted to the transmitter to adaptively select a type of mapping based on the second channel quality indicator.
摘要翻译：一种用于测量信道质量的方法和装置，已经发送了通过对源数据元素序列进行编码和星座映射而产生的符号序列。通过该信道接收一系列接收到的符号。基于先前发送到符号序列的发射机的第一信道质量指示符来对接收符号的序列进行解映射。解映射的符号被解码以产生解码的输出序列。在一些实施例中，解码可以基于第一信道质量指示符。解码的输出序列被重新编码以产生重新编码的输出序列。去映射符号与重新编码的输出序列相关，以产生第二信道质量指示符。第二信道质量指示符被发送到发射机，以基于第二信道质量指示符自适应地选择一种类型的映射。

35. 发明授权

US08588276B2 Methods and systems for OFDM using code division multiplexing 有权
标题翻译：使用码分复用的OFDM方法和系统
公开(公告)号：US08588276B2
公开(公告)日：2013-11-19
申请号：US13333463
申请日：2011-12-21
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： H04B1/707
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。

36. 发明授权

US08488722B2 Communication signal decoding and soft demapping methods and systems 有权
标题翻译：通信信号解码和软解映射方法和系统
公开(公告)号：US08488722B2
公开(公告)日：2013-07-16
申请号：US13358786
申请日：2012-01-26
申请人： Ming Jia , Peiying Zhu , Wen Tong , Jianglei Ma
发明人： Ming Jia , Peiying Zhu , Wen Tong , Jianglei Ma
IPC分类号： H03M13/41
CPC分类号： H04L25/02 , H04L25/03318 , H04L2025/03426 , H04L2025/03624
摘要： Symbol detection and soft dempapping methods and systems are provided. Individual subset symbol detection according to an embodiment of the invention involves identifying a search subset of a transmission symbol set for a transmission symbol. For each other transmission symbol in communication signals, multiple search subsets of the transmission symbol set are identified. The multiple search subsets include respective search subsets based on each transmission symbol in either the search subset for the first identified one of the transmission symbols or each of the multiple search subsets identified for a different one of the other transmission symbols. Symbol detection errors may be detected by identifying competing symbols and computing competing distances. Soft demapping may be provided by calculating soft decision results based on detected symbols and weighting the soft decision result.
摘要翻译：提供符号检测和软解压方法和系统。根据本发明的实施例的个体子集符号检测涉及识别用于传输符号的传输符号组的搜索子集。对于通信信号中的每个其他传输符号，识别传输符号集合的多个搜索子集。多个搜索子集包括基于针对第一被识别的一个传输符号的搜索子集中的每个传输符号或为其它传输符号中的不同一个标识的多个搜索子集中的每一个的每个传输符号。可以通过识别竞争符号和计算竞争距离来检测符号检测错误。可以通过基于检测到的符号计算软判定结果并对软决策结果加权来提供软解映射。

37. 发明授权

US08463130B2 Method and system for implementing a wireless network 有权
标题翻译：实现无线网络的方法和系统
公开(公告)号：US08463130B2
公开(公告)日：2013-06-11
申请号：US12830224
申请日：2010-07-02
申请人： Jianglei Ma , Hang Zhang , Wen Tong , Ming Jia , Peiying Zhu
发明人： Jianglei Ma , Hang Zhang , Wen Tong , Ming Jia , Peiying Zhu
IPC分类号： H04B10/00
CPC分类号： H04B10/1149 , H04W84/047 , H04W88/085 , H04W92/20 , Y02D70/142 , Y02D70/168 , Y02D70/46
摘要： Aspects of the present invention provide a multi-band hybrid Gigabit wireless communication system which is enabled by a number of different complementary access technologies to realize ubiquitous hyper-connectivity, true broadband, seamless operation and low power consumption. The system is capable of serving fixed, nomadic and mobile scenarios. The multi-band wireless system is a low power wireless system which operates in different frequency bands covering the spectrum from radio wave to optical wave by making use of both regulated bandwidths and unregulated bandwidths. Using low power distributed antenna and low power indoor and outdoor antennas enables the use of unregulated bandwidths as well as regulated bandwidths as the low power nature of the signals reduces the possibility of interference with the regulated use of the signals.
摘要翻译：本发明的方面提供了一种多频带混合千兆无线通信系统，其通过多种不同的互补接入技术来实现无处不在的超连接，真正的宽带，无缝操作和低功耗。该系统能够提供固定，游牧和移动场景。多频带无线系统是一种低功率无线系统，其通过利用调节带宽和不受限制的带宽来操作，覆盖从无线电波到光波的频谱的不同频带。使用低功率分布式天线和低功率室内和室外天线使得可以使用不受监管的带宽以及调节带宽，因为信号的低功耗特性降低了干扰信号调节使用的可能性。

38. 发明授权

US08462611B2 Pilot design for OFDM systems with four transmit antennas 有权
公开(公告)号：US08462611B2
公开(公告)日：2013-06-11
申请号：US10593053
申请日：2005-03-15
申请人： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Claude Royer
发明人： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Claude Royer
IPC分类号： H04J11/00
CPC分类号： H04L27/261 , H04B7/06 , H04B7/0615 , H04B7/0684 , H04L5/0026 , H04L5/0048 , H04L25/0204 , H04L25/0226 , H04L25/0234
摘要： Pilot, preamble and midamble patterns are provided that are particularly suited for four transmit antenna OFDM systems. Pilots are inserted in a scattered manner for each of the four antennas, either uncoded, space-time coded in pairs, space-time frequency coded in pairs, or space-time-frequency coded.

39. 发明授权

US08406118B2 Scattered pilot pattern and channel estimation method for MIMO-OFDM systems 有权
公开(公告)号：US08406118B2
公开(公告)日：2013-03-26
申请号：US13586660
申请日：2012-08-15
申请人： Peiying Zhu , Wen Tong , Jianglei Ma , Ming Jia
发明人： Peiying Zhu , Wen Tong , Jianglei Ma , Ming Jia
IPC分类号： H04J11/00 , H04B7/216 , H04L27/00
CPC分类号： H04L27/2613 , H04B7/04 , H04B7/0413 , H04B7/0684 , H04L1/0618 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0234 , H04L25/0244 , H04L27/2602 , H04L27/2627 , H04W52/42
摘要： A method and apparatus are provided for reducing the number of pilot symbols within a MIMO-OFDM communication system, and for improving channel estimation within such a system. For each transmitting antenna in an OFDM transmitter, pilot symbols are encoded so as to be unique to the transmitting antenna. The encoded pilot symbols are then inserted into an OFDM frame to form a diamond lattice, the diamond lattices for the different transmitting antennae using the same frequencies but being offset from each other by a single symbol in the time domain. At the OFDM receiver, a channel response is estimated for a symbol central to each diamond of the diamond lattice using a two-dimensional interpolation. The estimated channel responses are smoothed in the frequency domain. The channel responses of remaining symbols are then estimated by interpolation in the frequency domain.

40. 发明申请

US20130010887A1 SCATTERED PILOT PATTERN AND CHANNEL ESTIMATION METHOD FOR MIMO-OFDM SYSTEMS 有权
公开(公告)号：US20130010887A1
公开(公告)日：2013-01-10
申请号：US13617051
申请日：2012-09-14
申请人： Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong
发明人： Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong
IPC分类号： H04B7/02
CPC分类号： H04L27/2613 , H04B7/04 , H04B7/0413 , H04B7/0684 , H04L1/0618 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0234 , H04L25/0244 , H04L27/2602 , H04L27/2627 , H04W52/42
摘要： Methods and apparatus are provided for inserting data symbols and pilot symbols in an OFDM (orthogonal frequency division multiplexing) transmission resource utilizing frequency hopping patterns for the data symbols and/or the pilot symbols. Data symbols and pilot symbols are allocated for down link (base station to mobile station) and up link (mobile station to bases station) transmission resources in a two-dimensional time-frequency pattern. For each antenna of a MIMO-OFDM (multiple input multiple output OFDM) communication system, pilot symbols are inserted in a scattered pattern in time-frequency and data symbols are inserted in an identical frequency-hopping pattern in time-frequency as that of other antennas.

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