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1. 发明授权

US07672384B2 Bandwidth and power efficient multicarrier multiple access 有权
标题翻译：带宽和功率效率的多载波多路访问
公开(公告)号：US07672384B2
公开(公告)日：2010-03-02
申请号：US11070855
申请日：2005-03-02
申请人： Georgios B. Giannakis , Shengli Zhou , Pengfei Xia
发明人： Georgios B. Giannakis , Shengli Zhou , Pengfei Xia
IPC分类号： H04K1/10
CPC分类号： H04L5/023
摘要： Techniques are described for multicarrier multiple access wireless transmission, e.g. orthogonal frequency-division multiple access (OFDMA) transmissions, over frequency selective fading channels. The techniques are designed to maintain constant modulus transmissions for uplink while effectively mitigating intersymbol interference. Specifically, the techniques utilize non-redundant unitary precoding across OFDMA subcarriers to maintain constant modulus transmissions for uplink communications. For example, the techniques involve precoding a block of information symbols and assigning a different subcarrier for each symbol of the block. The subcarriers are selected to be equi-spaced and may be selected, for example, from a phase-shift keying constellation. The number of symbols per block is equal to the number of subcarriers assigned per user. Importantly, even with multiple subcarriers per user, the techniques enable constant modulus transmissions for uplink. Consequently, the techniques may achieve high power and bandwidth efficiency as well as improved performance over conventional OFDMA and GMC-CDMA transmissions.
摘要翻译：描述了用于多载波多址无线传输的技术，例如。正交频分多址（OFDMA）传输，频率选择性衰落信道。这些技术被设计为保持上行链路的恒定模数传输，同时有效地减轻符号间干扰。具体地说，这些技术利用跨OFDMA子载波的非冗余单一预编码来维持用于上行链路通信的恒模传输。例如，这些技术涉及对信息符号块进行预编码并为块的每个符号分配不同的子载波。子载波被选择为等间距，并且可以例如从相移键控星座中选择。每个块的符号数等于每个用户分配的子载波数。重要的是，即使每个用户有多个子载波，这些技术也可以实现上行链路的恒定模数传输。因此，与传统的OFDMA和GMC-CDMA传输相比，这些技术可以实现高功率和带宽效率以及改进的性能。

2. 发明申请

US20050220200A1 Bandwidth and power efficient multicarrier multiple access 有权
标题翻译：带宽和功率效率的多载波多路访问
公开(公告)号：US20050220200A1
公开(公告)日：2005-10-06
申请号：US11070855
申请日：2005-03-02
申请人： Georgios Giannakis , Shengli Zhou , Pengfei Xia
发明人： Georgios Giannakis , Shengli Zhou , Pengfei Xia
IPC分类号： H04K1/10 , H04L5/02
CPC分类号： H04L5/023
摘要： Techniques are described for multicarrier multiple access wireless transmission, e.g. orthogonal frequency-division multiple access (OFDMA) transmissions, over frequency selective fading channels. The techniques are designed to maintain constant modulus transmissions for uplink while effectively mitigating intersymbol interference. Specifically, the techniques utilize non-redundant unitary precoding across OFDMA subcarriers to maintain constant modulus transmissions for uplink communications. For example, the techniques involve precoding a block of information symbols and assigning a different subcarrier for each symbol of the block. The subcarriers are selected to be equi-spaced and may be selected, for example, from a phase-shift keying constellation. The number of symbols per block is equal to the number of subcarriers assigned per user. Importantly, even with multiple subcarriers per user, the techniques enable constant modulus transmissions for uplink. Consequently, the techniques may achieve high power and bandwidth efficiency as well as improved performance over conventional OFDMA and GMC-CDMA transmissions.
摘要翻译：描述了用于多载波多址无线传输的技术，例如。正交频分多址（OFDMA）传输，频率选择性衰落信道。这些技术被设计为保持上行链路的恒定模数传输，同时有效地减轻符号间干扰。具体地说，这些技术利用跨OFDMA子载波的非冗余单一预编码来维持用于上行链路通信的恒模传输。例如，这些技术涉及对信息符号块进行预编码并为块的每个符号分配不同的子载波。子载波被选择为等间距，并且可以例如从相移键控星座中选择。每个块的符号数等于每个用户分配的子载波数。重要的是，即使每个用户有多个子载波，这些技术也可以实现上行链路的恒定模数传输。因此，与传统的OFDMA和GMC-CDMA传输相比，这些技术可以实现高功率和带宽效率以及改进的性能。

3. 发明授权

US08917208B2 System and method for efficient transmit and receive beamforming protocol with heterogeneous antenna configuration 有权
标题翻译：用于异构天线配置的高效发射和接收波束成形协议的系统和方法
公开(公告)号：US08917208B2
公开(公告)日：2014-12-23
申请号：US13154326
申请日：2011-06-06
申请人： Huaning Niu , Pengfei Xia , Chiu Ngo
发明人： Huaning Niu , Pengfei Xia , Chiu Ngo
IPC分类号： H01Q3/00 , H04B7/00 , H01Q3/26 , H04B7/06 , H04B7/04
CPC分类号： H01Q3/2605 , H01Q3/26 , H04B7/043 , H04B7/0691
摘要： A system and method of training antennas for two devices having heterogeneous antenna configurations in a wireless network is disclosed. The method includes communicating one or more estimation training sequences between two devices via a phased array antenna and a switched array antenna, wherein a beamforming vector of the phased array antenna is switched between phase vectors within a set of weight vectors while the switched array antenna is switched within a plurality of antenna sectors. The method further includes tuning at least one of the phase array and switched array antennas with an antenna parameter selected based at least in part on the one or more estimation training sequences. The method further includes communicating data messages via at least one of the phase array and switched array antennas so tuned.
摘要翻译：公开了一种用于在无线网络中具有异构天线配置的两个设备的天线的训练系统和方法。该方法包括经由相控阵天线和切换阵列天线在两个设备之间通信一个或多个估计训练序列，其中相控阵天线的波束成形向量在一组加权矢量内的相位矢量之间切换，而切换阵列天线为在多个天线扇区内切换。该方法还包括使用至少部分地基于一个或多个估计训练序列选择的天线参数调谐相位阵列和开关阵列天线中的至少一个。该方法还包括经由如此调谐的相位阵列和开关阵列天线中的至少一个传送数据消息。

4. 发明授权

US08705443B2 System and method for reduced feedback in multiuser multiple input, multiple output wireless communications 有权
标题翻译：用于多用户多输入，多输出无线通信的减少反馈的系统和方法
公开(公告)号：US08705443B2
公开(公告)日：2014-04-22
申请号：US12711654
申请日：2010-02-24
申请人： Yang Tang , Pengfei Xia , Zhigang Rong
发明人： Yang Tang , Pengfei Xia , Zhigang Rong
IPC分类号： H04W4/00 , H04L12/16 , H04Q11/00 , H04L27/00
CPC分类号： H04L25/0248 , H04B7/0452 , H04B7/0663 , H04L25/0204
摘要： A system and method for reduced feedback in MU-MIMO communications is provided. A method for transmitter operations includes transmitting a pilot signal, receiving channel information feedback from a set of K communications devices served by a transmitter, where K is a non-negative integer value and K≧2, selecting M communications devices out of the set of K communications devices, where M is a non-negative integer value and M≦K, computing a precoder for each of the M selected communications devices based on the channel information feedback, and simultaneously transmitting information to the M selected communications devices. The channel information feedback includes partial information for a communications channel between the transmitter and a communications device, the selecting being based on the channel information feedback, and the information transmitted to each communications device in the M selected communications devices being precoded using a computed precoder associated with the communications device.
摘要翻译：提供了一种用于MU-MIMO通信中的减少反馈的系统和方法。一种用于发射机操作的方法包括：传输导频信号，从由发射机服务的一组K个通信设备接收信道信息反馈，其中K是非负整数值，K≥2，选择M个通信设备 K通信设备，其中M是非负整数值，并且M＆NlE; K，基于信道信息反馈计算M个选择的通信设备中的每一个的预编码器，并且同时向M个选择的通信设备发送信息。信道信息反馈包括用于发射机和通信设备之间的通信信道的部分信息，所述选择基于信道信息反馈，并且传输到M个选择的通信设备中的每个通信设备的信息使用计算的预编码器相关联进行预编码与通信设备。

5. 发明授权

US08478204B2 System and method for antenna training of beamforming vectors having reuse of directional information 有权
标题翻译：具有重定向信息的波束成形向量的天线训练的系统和方法
公开(公告)号：US08478204B2
公开(公告)日：2013-07-02
申请号：US12172853
申请日：2008-07-14
申请人： Xiangping Qin , Pengfei Xia , Chiu Ngo
发明人： Xiangping Qin , Pengfei Xia , Chiu Ngo
IPC分类号： H04B1/00 , H04B7/00
CPC分类号： H04B7/0617 , H01Q3/267 , H04B7/0632
摘要： A system and method for reusing existing directional information to configure antennas in a wireless network is disclosed. The method includes retrieving existing directional information, the existing directional information having been established in a previous antenna training session with a receiver. The method further includes performing a signal-to-noise ratio (SNR) estimation procedure comprising: transmitting an SNR estimation probe message to the receiver via a directional antenna tuned with the existing directional information, and determining whether an estimated SNR value associated with the SNR estimation probe message is equal to or greater than a threshold SNR value. The method further includes transmitting a data message to the receiver via the directional antenna tuned with the existing directional information if it is determined that the estimated SNR value is equal to or greater than the threshold SNR value.
摘要翻译：公开了一种用于重用现有方向信息以配置无线网络中的天线的系统和方法。该方法包括检索现有方向信息，已经在与接收机的先前的天线训练会话中建立的方向信息。该方法还包括执行信噪比（SNR）估计过程，包括：经由与现有方向信息调谐的定向天线向接收机发送SNR估计探测消息，以及确定与SNR相关联的估计SNR值估计探测消息等于或大于阈值SNR值。如果确定估计的SNR值等于或大于阈值SNR值，该方法还包括经由与现有方向信息调谐的定向天线向接收机发送数据消息。

6. 发明申请

US20110255613A1 System and Method for Feeding Back Channel Information 有权
标题翻译：反馈信道信息的系统和方法
公开(公告)号：US20110255613A1
公开(公告)日：2011-10-20
申请号：US13086060
申请日：2011-04-13
申请人： Pengfei Xia , Qiang Wu , David Mazzarese , Yongxing Zhou , Yang Tang
发明人： Pengfei Xia , Qiang Wu , David Mazzarese , Yongxing Zhou , Yang Tang
IPC分类号： H04L27/00
CPC分类号： H04B7/063 , H04B7/0634 , H04B7/065
摘要： A system and method for feeding back channel information are provided. A method for communications device operations includes generating feedback information, encoding the feedback information to produce a feedback payload, and transmitting the feedback payload to a communications server serving a communications device. The feedback information includes at least a first long term wideband channel statistics and a second long term wideband channel statistics.
摘要翻译：提供了一种用于反馈信道信息的系统和方法。用于通信设备操作的方法包括产生反馈信息，对反馈信息进行编码以产生反馈有效载荷，以及将反馈有效载荷发送到服务于通信设备的通信服务器。反馈信息包括至少第一长期宽带信道统计和第二长期宽带信道统计。

7. 发明申请

US20110243207A1 System and Method for Adapting Codebooks 审中-公开
标题翻译：适应码本的系统和方法
公开(公告)号：US20110243207A1
公开(公告)日：2011-10-06
申请号：US13011679
申请日：2011-01-21
申请人： Yang Tang , Pengfei Xia
发明人： Yang Tang , Pengfei Xia
IPC分类号： H04B17/00 , H04L27/00
CPC分类号： H04L25/03343 , H04B7/0626 , H04L2025/03808
摘要： A system and method for adapting codebooks are provided. A method for communications device operations includes receiving a pilot signal, computing a channel estimate for a channel between a controller and a communications device, the computing being based on the pilot signal, adapting a codebook based on the channel estimate and positions of codewords in the codebook, computing a representation of the channel using the adapted codebook, transmitting the representation of the channel as feedback information, and receiving a transmission beamformed based on the feedback information.
摘要翻译：提供了一种适应码本的系统和方法。一种用于通信设备操作的方法包括接收导频信号，计算控制器和通信设备之间的信道的信道估计，所述计算是基于导频信号，基于信道估计和码字中的位置来调整码本码本，使用适应的码本计算信道的表示，将该信道的表示传输为反馈信息，以及基于该反馈信息接收形成的传输波束。

8. 发明申请

US20100265841A1 System and Method for Precoding Codebook Adaptation with Low Feedback Overhead 有权
标题翻译：低反馈开销预编码码本适应的系统和方法
公开(公告)号：US20100265841A1
公开(公告)日：2010-10-21
申请号：US12760038
申请日：2010-04-14
申请人： Zhigang Rong , Pengfei Xia , Yang Tang
发明人： Zhigang Rong , Pengfei Xia , Yang Tang
IPC分类号： H04L12/26
CPC分类号： H04L43/08 , H04B7/0417 , H04B7/0639 , H04L5/0023 , H04L25/0224 , H04L41/0816
摘要： A system and method for wireless communications with codebook adaptation with low feedback overhead are provided. A method for controller operations includes receiving a first channel information from a communications device, estimating channel statistics based on the first channel information, adapting a codebook using the channel statistics, and receiving a second channel information from the communications device. The method also includes constructing a precoding matrix from the second channel information and the adapted codebook, and transmitting information precoded by the precoding matrix to the communications device.
摘要翻译：提供了一种用于具有低反馈开销的码本适配的无线通信的系统和方法。一种用于控制器操作的方法包括从通信设备接收第一信道信息，基于第一信道信息估计信道统计，使用信道统计调整码本，以及从通信设备接收第二信道信息。该方法还包括从第二信道信息和适应码本构建预编码矩阵，以及将通过预编码矩阵预编码的信息发送到通信设备。

9. 发明申请

US20100020770A1 SYSTEM AND METHOD FOR BANDWIDTH RESERVATION PROTOCOL FOR SPATIAL REUSE IN A WIRELESS COMMUNICATION NETWORK 有权
标题翻译：无线通信网络中空间重用带宽预留协议的系统与方法
公开(公告)号：US20100020770A1
公开(公告)日：2010-01-28
申请号：US12179457
申请日：2008-07-24
申请人： Xiangping Qin , Pengfei Xia , Chiu Ngo
发明人： Xiangping Qin , Pengfei Xia , Chiu Ngo
IPC分类号： H04J3/00 , H04B7/212
CPC分类号： H04W74/0816 , H04N21/2381 , H04N21/2383 , H04N21/2385 , H04N21/2402 , H04N21/2408 , H04N21/44209 , H04W72/082
摘要： A system and method for providing spatial reuse in a wireless network for communicating compressed and uncompressed audio/video is disclosed. A bandwidth reservation request for data communication with a receiver to a coordinator is transmitted. A first response indicating availability of the receiver for the data communication is received. A channel is listened to by a station for channel busy indication (CBI) messages transmitted by other stations in the wireless network. A local channel occupation report comprising data indicative of one or more time periods during which one or more other stations in the wireless network are scheduled to transmit data messages is transmitted to the coordinator. A second response comprising data indicative of one or more allocated channel time slots is received. Audio and/or video (A/V) data is transmitted to the receiver during the allocated channel time slots.
摘要翻译：公开了一种用于在无线网络中提供空间重用以传送压缩和未压缩音频/视频的系统和方法。发送用于与协调器的接收器的数据通信的带宽预留请求。接收到指示用于数据通信的接收机的可用性的第一响应。由无线网络中的其他站发送的信道忙指示（CBI）消息由一个站收听一个信道。包括指示一个或多个时间段的数据的本地信道占用报告被发送到协调器，所述时间段在无线网络中的一个或多个其他站被调度为传送数据消息。接收包括指示一个或多个分配的信道时隙的数据的第二响应。音频和/或视频（A / V）数据在分配的信道时隙期间被发送到接收机。

10. 发明申请

US20090193300A1 SYSTEM AND METHOD FOR PSEUDORANDOM PERMUTATION FOR INTERLEAVING IN WIRELESS COMMUNICATIONS 有权
标题翻译：用于在无线通信中交互的PSEUDORANDOM PERM的系统和方法
公开(公告)号：US20090193300A1
公开(公告)日：2009-07-30
申请号：US12264111
申请日：2008-11-03
申请人： Pengfei Xia , Chiu Ngo
发明人： Pengfei Xia , Chiu Ngo
IPC分类号： G06F11/00
CPC分类号： H04L1/0071 , H03M13/2739 , H03M13/2789 , H04L1/0065
摘要： A system and method for pseudorandom permutation for interleaving in wireless communication is disclosed. In one embodiment, the method comprises receiving a first ordered sequence of communication symbols having a first order, permuting the first ordered sequence of communication symbols to generate a second ordered sequence of communication symbols having a second order, and outputting the second ordered sequence of communication symbols, wherein the second order is based, at least in part, on a third order having a greater size than the second order, the third order being a pseudorandom permutation defined by the input-output relationship Y = mod  ( m * S * ( S + 1 ) 2 , P ) , wherein P is the smallest power of two not less than the number of elements in the first ordered sequence, S is an input order represented by a sequence of consecutive integers from zero to P−1 in increasing order, Y is an output order represented as a sequence of integers, and m is an integer.
摘要翻译：公开了一种用于在无线通信中进行交织的伪随机置换的系统和方法。在一个实施例中，该方法包括接收具有第一阶的通信符号的第一有序序列，置换通信符号的第一有序序列以产生具有二阶通信符号的第二有序序列，并输出第二有序序列的通信符号，其中所述第二级至少部分地基于具有比所述第二级更大的大小的第三级，所述第三级是由所述输入 - 输出关系定义的伪随机排列 $Y=modmo>（m*S*（S+1mo>），其中P是最小 2是不小于第一序列中的元素数量的幂，S是以从0到P-1的连续整数序列的增加顺序表示的输入顺序，Y是表示为整数序列的输出顺序， m是整数。$

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