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1. 发明申请

US20070041466A1 Antenna virtualization in communication systems 有权
公开(公告)号：US20070041466A1
公开(公告)日：2007-02-22
申请号：US11506734
申请日：2006-08-17
申请人： Nicolae Chiurtu , Arogyaswami Paulraj
发明人： Nicolae Chiurtu , Arogyaswami Paulraj
IPC分类号： H04L1/02
CPC分类号： H04B7/0671 , H04B7/0615 , H04B7/0682 , H04B7/10 , H04L27/2626
摘要： Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a radiation pattern that effectively appears to originate from a single antenna. The communications operations include receiving at least one input stream. Multiple transmit signals are generated from the received input stream; the number of transmit signals generated is greater than the number of received input streams. Generation of the transmit signals involves transforming the input stream. The transforming includes applying one or more of a variable delay, a phase shift, and signal shaping to information of the input stream. The transmit signals are transmitted by a separate antenna of an antenna system.

2. 发明授权

US07684511B2 Antenna virtualization in communication systems 有权
标题翻译：通信系统中的天线虚拟化
公开(公告)号：US07684511B2
公开(公告)日：2010-03-23
申请号：US11506734
申请日：2006-08-17
申请人： Nicolae Chiurtu , Arogyaswami Paulraj
发明人： Nicolae Chiurtu , Arogyaswami Paulraj
IPC分类号： H04B7/02
CPC分类号： H04B7/0671 , H04B7/0615 , H04B7/0682 , H04B7/10 , H04L27/2626
摘要： Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a radiation pattern that effectively appears to originate from a single antenna. The communications operations include receiving at least one input stream. Multiple transmit signals are generated from the received input stream; the number of transmit signals generated is greater than the number of received input streams. Generation of the transmit signals involves transforming the input stream. The transforming includes applying one or more of a variable delay, a phase shift, and signal shaping to information of the input stream. The transmit signals are transmitted by a separate antenna of an antenna system.
摘要翻译：描述了从输入流或信号生成多个发送信号的通信系统和方法。统称为天线虚拟化或虚拟天线系统的通信系统和方法从每个输入流产生多个发射信号，当被驱动到多个天线中时，产生有效地似乎源于单个天线的辐射图。通信操作包括接收至少一个输入流。从接收到的输入流生成多个发送信号; 生成的发送信号的数量大于接收的输入流的数量。发送信号的生成涉及变换输入流。变换包括将可变延迟，相移和信号整形中的一个或多个应用于输入流的信息。发射信号由天线系统的单独天线发射。

3. 发明授权

US07450657B2 Antenna virtualization in communication systems 有权
标题翻译：通信系统中的天线虚拟化
公开(公告)号：US07450657B2
公开(公告)日：2008-11-11
申请号：US11506318
申请日：2006-08-17
申请人： Arogyaswami Paulraj , Nicolae Chiurtu
发明人： Arogyaswami Paulraj , Nicolae Chiurtu
IPC分类号： H04B7/02
CPC分类号： H04B7/0671 , H04B7/0615 , H04B7/0682 , H04B7/10 , H04L27/2626
摘要： Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a radiation pattern that effectively appears to originate from a single antenna. The communications operations include receiving at least one input stream. Multiple transmit signals are generated from the received input stream; the number of transmit signals generated is greater than the number of received input streams. Generation of the transmit signals involves transforming the input stream. The transforming includes applying one or more of a variable delay, a phase shift, and signal shaping to information of the input stream. The transmit signals are transmitted by a separate antenna of an antenna system.
摘要翻译：描述了从输入流或信号生成多个发送信号的通信系统和方法。统称为天线虚拟化或虚拟天线系统的通信系统和方法从每个输入流产生多个发射信号，当被驱动到多个天线中时，产生有效地似乎源于单个天线的辐射图。通信操作包括接收至少一个输入流。从接收到的输入流生成多个发送信号; 生成的发送信号的数量大于接收的输入流的数量。发送信号的生成涉及变换输入流。变换包括将可变延迟，相移和信号整形中的一个或多个应用于输入流的信息。发射信号由天线系统的单独天线发射。

4. 发明申请

US20070041465A1 Antenna virtualization in communication systems 有权
标题翻译：通信系统中的天线虚拟化
公开(公告)号：US20070041465A1
公开(公告)日：2007-02-22
申请号：US11506318
申请日：2006-08-17
申请人： Arogyaswami Paulraj , Nicolae Chiurtu
发明人： Arogyaswami Paulraj , Nicolae Chiurtu
IPC分类号： H04L1/02
CPC分类号： H04B7/0671 , H04B7/0615 , H04B7/0682 , H04B7/10 , H04L27/2626
摘要： Communication systems and methods are described in which multiple transmit signals are generated from an input stream or signal. The communication systems and methods, collectively referred to as antenna virtualization or virtual antenna systems, generate from each input stream multiple transmit signals that when driven into multiple antennas create a radiation pattern that effectively appears to originate from a single antenna. The communications operations include receiving at least one input stream. Multiple transmit signals are generated from the received input stream; the number of transmit signals generated is greater than the number of received input streams. Generation of the transmit signals involves transforming the input stream. The transforming includes applying one or more of a variable delay, a phase shift, and signal shaping to information of the input stream. The transmit signals are transmitted by a separate antenna of an antenna system.
摘要翻译：描述了从输入流或信号生成多个发送信号的通信系统和方法。统称为天线虚拟化或虚拟天线系统的通信系统和方法从每个输入流产生多个发射信号，当被驱动到多个天线中时，产生有效地似乎源于单个天线的辐射图。通信操作包括接收至少一个输入流。从接收到的输入流生成多个发送信号; 生成的发送信号的数量大于接收的输入流的数量。发送信号的生成涉及变换输入流。变换包括将可变延迟，相移和信号整形中的一个或多个应用于输入流的信息。发射信号由天线系统的单独天线发射。

5. 发明授权

US08855046B2 Method and system for uplink coordinated reception in orthogonal frequency division multiple access systems 有权
标题翻译：在正交频分多址系统中上行协调接收的方法和系统
公开(公告)号：US08855046B2
公开(公告)日：2014-10-07
申请号：US11731714
申请日：2007-03-30
申请人： Louay Jalloul , Djordje Tujkovic , Vummintala Shashidhar , Bertrand Hochwald , Arogyaswami Paulraj
发明人： Louay Jalloul , Djordje Tujkovic , Vummintala Shashidhar , Bertrand Hochwald , Arogyaswami Paulraj
IPC分类号： H04W4/00 , H04B1/00 , H04W72/08 , H04L25/03
CPC分类号： H04W72/082 , H04B7/0491 , H04L5/023 , H04L2025/03414 , H04L2025/03426 , H04W52/24 , H04W52/241 , H04W52/243
摘要： Embodiments disclose a method of coordinating reception of uplink transmissions in order to reduce interference among transceivers in an OFDM wireless transmission system, or similar communication system, including a number of receivers communicating with one or more basestations in cell or sector arrangements. A basestation within each sector includes an uplink coordinated reception process that imposes coordinated reception techniques across sector or cell boundaries in order to improve uplink transmission quality between target terminals and basestations within each sector.
摘要翻译：实施例公开了一种协调上行链路传输的接收的方法，以便减少OFDM无线传输系统中的收发器之间的干扰，或者类似的通信系统，包括与小区或扇区布置中的一个或多个基站通信的多个接收机。每个扇区内的基站包括上行链路协调接收过程，其跨扇区或小区边界施加协调的接收技术，以便改善目标终端与每个扇区内的基站之间的上行传输质量。

6. 发明申请

US20130003642A1 SCHEDULING AND TRANSMITTING UPLINK PACKETS WITHIN UPLINK SUB-FRAMES OFA WIRELESS SYSTEM 审中-公开
标题翻译：无线系统的上链路子框架中的调度和发送上行链路分组
公开(公告)号：US20130003642A1
公开(公告)日：2013-01-03
申请号：US13607074
申请日：2012-09-07
申请人： Anuj Puri , Manish Airy , Amar Prakash Azad , Arogyaswami Paulraj
发明人： Anuj Puri , Manish Airy , Amar Prakash Azad , Arogyaswami Paulraj
IPC分类号： H04W72/04 , H04W4/06
CPC分类号： H04L5/0046 , H04L5/006 , H04L27/2626 , H04W28/06 , H04W72/1268
摘要： A method and apparatus of scheduling and transmitting uplink packets within uplink sub-frames of a wireless system is disclosed. The method includes determining a size of a standard data unit, and determining if the standard data unit can be transmitted within a single sub-channel of an uplink frame by comparing the size of the standard data unit with a number of bits that can be transmitted within the uplink frame as determined by an uplink quality. If the standard data unit is too large to be transmitted within a single sub-channel of an uplink frame, then the standard data unit is divided into sub-data units. The sub-data units are transmitted over multiple uplink frames.
摘要翻译：公开了一种在无线系统的上行链路子帧内调度和发送上行链路分组的方法和装置。该方法包括：确定标准数据单元的大小，以及通过将标准数据单元的大小与可传输的比特数进行比较来确定标准数据单元是否能够在上行链路帧的单个子信道内发送在上行链路帧内，由上行链路质量确定。如果标准数据单元太大而不能在上行链路帧的单个子信道内传输，则将标准数据单元划分为子数据单元。子数据单元通过多个上行链路帧传输。

7. 发明申请

US20070217369A1 Downlink coordinated transmission in OFDMA systems, including WiMax systems 失效
标题翻译： OFDMA系统中的下行协调传输，包括WiMax系统
公开(公告)号：US20070217369A1
公开(公告)日：2007-09-20
申请号：US11725920
申请日：2007-03-20
申请人： David Garrett , Bertrand Hochwald , Arogyaswami Paulraj , Djordje Tujkovic , Louay Jalloul
发明人： David Garrett , Bertrand Hochwald , Arogyaswami Paulraj , Djordje Tujkovic , Louay Jalloul
IPC分类号： H04J3/00
CPC分类号： H04L5/0058 , H04L5/0023 , H04L5/0037 , H04L5/023 , H04L27/2608 , H04W16/10 , H04W16/24 , H04W72/082 , H04W72/085
摘要： Embodiments described herein include methods for improving the SINR, and therefore communication quality or rate, in the downlink of a cellular communication system. In an embodiment, the system is an orthogonal-frequency-division multiple-access (OFDMA) system. In an embodiment, a set of terminals is designated a coordinated-transmission group. The set of terminal is chosen such that the slot-allocations of the set are given special treatment to alleviate interference from other sectors or cells. In an embodiment, “zones” defined in the WiMax standard are “repurposed” to handle the coordinated-transmission, although the zone was originally intended for another purpose.
摘要翻译：本文描述的实施例包括用于在蜂窝通信系统的下行链路中改善SINR以及因此通信质量或速率的方法。在一个实施例中，该系统是正交频分多址（OFDMA）系统。在一个实施例中，一组终端被指定为协调传输组。选择终端的集合，使得该组的时隙分配被给予特殊处理以减轻来自其他扇区或小区的干扰。在一个实施例中，WiMax标准中定义的“区域”被“重新利用”以处理协调传输，尽管该区域原本是为了另一目的。

8. 发明申请

US20050174981A1 Wireless communications system that supports multiple modes of operation 有权
标题翻译：支持多种操作模式的无线通信系统
公开(公告)号：US20050174981A1
公开(公告)日：2005-08-11
申请号：US11101813
申请日：2005-04-07
申请人： Robert Heath , Rajeev Krishnamoorthy , Peroor Sebastian , Arogyaswami Paulraj
发明人： Robert Heath , Rajeev Krishnamoorthy , Peroor Sebastian , Arogyaswami Paulraj
IPC分类号： H04B7/212 , H04B7/216 , H04L12/56
CPC分类号： H04W72/042 , H04W16/14 , H04W24/00 , H04W24/10 , H04W48/18 , H04W72/0413 , H04W88/06
摘要： A wireless communications adapts its mode of operation between spatial multiplexing and non-spatial multiplexing in response to transmission-specific variables. An embodiment of a wireless communications system for transmitting information between a base transceiver station and a subscriber unit includes mode determination logic. The mode determination logic is in communication with the base transceiver station and the subscriber unit. The mode determination logic determines, in response to a received signal, if a subscriber datastream should be transmitted between the base transceiver station and the subscriber unit utilizing spatial multiplexing or non-spatial multiplexing. In an embodiment, the mode determination logic has an input for receiving a measure of a transmission characteristic related to the received signal. In an embodiment, the mode determination logic includes logic for comparing the measured transmission characteristic to a transmission characteristic threshold and for selecting one of spatial multiplexing and non-spatial multiplexing in response to the comparison of the measured transmission characteristic to the transmission characteristic threshold. In an embodiment, the transmission characteristic includes at least one of delay spread, post-processing signal-to-noise ratio, cyclical redundancy check (CRC) failure, residual inter-symbol interference, mean square error, coherence time, and path loss. By adapting the mode of operation in response to transmission-specific variables, the use of spatial multiplexing can be discontinued in unfavorable conditions. Additionally, because the wireless communications system can adapt its mode of operation between spatial multiplexing and non-spatial multiplexing, the communications system is compatible with both subscriber units that support spatial multiplexing and subscriber units that do not support spatial multiplexing.
摘要翻译：无线通信响应于传输特定变量，适应其在空间复用和非空间复用之间的操作模式。用于在基站和用户单元之间发送信息的无线通信系统的实施例包括模式确定逻辑。模式确定逻辑与基站收发台和用户单元通信。模式确定逻辑响应于接收到的信号，确定在基站收发台和订户单元之间是否应使用空间复用或非空间复用来发送订户数据流。在一个实施例中，模式确定逻辑具有用于接收与所接收信号相关的传输特性的度量的输入。在一个实施例中，模式确定逻辑包括用于将所测量的传输特性与传输特性阈值进行比较并用于响应于测量的传输特性与传输特性阈值的比较来选择空间复用和非空间复用之一的逻辑。在一个实施例中，传输特性包括延迟扩展，后处理信噪比，循环冗余校验（CRC）故障，残余符号间干扰，均方误差，相干时间和路径损耗中的至少一个。通过适应传输特定变量的操作模式，可以在不利条件下停止使用空间复用。此外，由于无线通信系统能够适应空间复用和非空间复用之间的操作模式，所以通信系统与支持空间复用的两个用户单元和不支持空间复用的用户单元兼容。

9. 发明授权

US5634199A Method of subspace beamforming using adaptive transmitting antennas with feedback 失效
标题翻译：使用具有反馈的自适应发射天线的子空间波束成形方法
公开(公告)号：US5634199A
公开(公告)日：1997-05-27
申请号：US424662
申请日：1995-04-17
申请人： Derek Gerlach , Arogyaswami Paulraj , Gregory G. Raleigh
发明人： Derek Gerlach , Arogyaswami Paulraj , Gregory G. Raleigh
IPC分类号： H01Q3/26 , H04B1/12 , H04B7/06 , H04B15/00
CPC分类号： H01Q3/2605 , H04B1/126 , H04B7/0626 , H04B7/0617
摘要： A method is disclosed for using feedback to reduce crosstalk between mobile receivers in a wireless communications system comprising an adaptive transmitting antenna array. Feedback signals from the receivers are time-averaged and used to calculate a set of weight vectors that minimize crosstalk and maximize desired signal without requiring burdensome feedback rates. Beamforming diversity is combined with feedback through the use of diversity vectors. The preferred embodiment includes a method for obtaining the required feedback by exploiting the SAT circuitry present in the AMPS system currently in use. Consequently, the method may be implemented without modification to existing cellular phone handsets.
摘要翻译：公开了一种使用反馈来减少包括自适应发射天线阵列的无线通信系统中的移动接收机之间的串扰的方法。来自接收机的反馈信号是时间平均的，并且用于计算最小化串扰并最大化期望信号的一组权重向量，而不需要繁重的反馈速率。波束形成分集通过使用分集向量与反馈相结合。优选实施例包括通过利用当前使用的AMPS系统中存在的SAT电路来获得所需反馈的方法。因此，可以在不修改现有蜂窝电话手机的情况下实现该方法。

10. 发明授权

US08116388B2 Time domain interference averaging with multiuser diversity in OFDMA systems 失效
标题翻译： OFDMA系统中多用户分集的时域干扰平均
公开(公告)号：US08116388B2
公开(公告)日：2012-02-14
申请号：US11454656
申请日：2006-06-16
申请人： Djordje Tujkovic , Arogyaswami Paulraj
发明人： Djordje Tujkovic , Arogyaswami Paulraj
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L5/023 , H04L27/2608 , H04W72/0453
摘要： Interference between multiple users operating under multiuser diversity within a coherence bandwidth in an OFDMA system is reduced by spreading out the users' transmission symbols randomly in time within the coherence bandwidth. When transmission symbols are randomly dispersed, the variance of interference between users in the same sub-band is reduced on average.
摘要翻译：通过在相干带宽内随时随地扩散用户的传输符号，减少在OFDMA系统中的相干带宽内在多用户分集下操作的多个用户之间的干扰。当传输符号随机分散时，相同子带内的用户之间的干扰差异平均减小。

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