公开(公告)号：US07508748B2

公开(公告)日：2009-03-24

申请号：US10778570

申请日：2004-02-13

申请人： Tamer Kadous

发明人： Tamer Kadous

IPC分类号： H04J11/00

CPC分类号： H04L5/006 ,  H04L1/0003 ,  H04L1/0025 ,  H04L1/16 ,  H04L1/1671 ,  H04L5/0023 ,  H04L5/0046 ,  H04L27/2626 ,  H04L27/2647 ,  Y02D50/10

摘要： To select a rate for data transmission in a multi-carrier MIMO system with a multipath MIMO channel, a post-detection SNR SNRl(k) for each subband k of each spatial channel l is initially determined and used to derive a constrained spectral efficiency Sl(k) based on a constrained spectral efficiency function fsiso(SNRl(k), M) of SNR and modulation scheme M. An average constrained spectral efficiency Savg for all subbands of all spatial channels used for data transmission is next determined based on the constrained spectral efficiencies for the individual subbands/spatial channels. An equivalent SNR needed by an equivalent system with an AWGN channel to support a data rate of Savg is determined based on an inverse constrained spectral efficiency function fsiso−1(Savg, M). A rate is selected for the multi-carrier MIMO system based on the equivalent SNR. The selected rate is the highest rate among all supported rates with a required SNR less than or equal to the equivalent SNR.

摘要翻译： 为了选择具有多径MIMO信道的多载波MIMO系统中的数据传输速率，首先确定每个空间信道1的每个子带k的检测后SNR SNR1（k），并用于导出约束频谱效率S1 （k）基于SNR和调制方案M的受约束的频谱效率函数fsiso（SNR1（k），M）。用于数据传输的所有空间信道的所有子带的平均约束频谱效率Savg接下来基于约束 各个子带/空间信道的频谱效率。 基于反约束频谱效率函数fsiso-1（Savg，M）确定具有AWGN信道的等效系统所需的用于支持Savg的数据速率的等效SNR。 基于等效SNR为多载波MIMO系统选择速率。 所选择的速率是所有支持的速率中具有所需SNR小于或等于等效SNR的最高速率。

公开(公告)号：US07457639B2

公开(公告)日：2008-11-25

申请号：US11137982

申请日：2005-05-24

申请人： Anand D. Subramaniam ,  Tamer Kadous

发明人： Anand D. Subramaniam ,  Tamer Kadous

IPC分类号： H04B1/38 ,  H04B17/00

CPC分类号： H04L1/0687 ,  H04B7/0602 ,  H04B7/0802 ,  H04L1/0003 ,  H04L1/0009

摘要： Techniques are provided to support successive interference cancellation (SIC) receiver processing with selection diversity whereby each of NT transmit antennas may be turned on or off. One symbol stream may be transmitted from each transmit antenna. A SIC receiver recovers the transmitted symbol streams in a specific order. Up to NT! orderings are evaluated. For each ordering, NT post-detection SNRs are obtained for NT transmit antennas and used to determine NT data rates, where the data rate is zero if the post-detection SNR is worse than a minimum required SNR. An overall data rate is computed for each ordering based on the NT data rates. The ordering with the highest overall data rate is selected for use. Up to NT symbol streams are processed at the data rates for the selected ordering and transmitted. The transmitted symbol streams are recovered in accordance with the selected ordering.

摘要翻译： 提供技术以支持具有选择分集的连续干扰消除（SIC）接收机处理，从而N T个发射天线中的每一个可以被接通或断开。 一个符号流可以从每个发送天线发送。 SIC接收器以特定顺序恢复发送的符号流。 直到N＆lt; T＆gt;！ 对订单进行评估。 对于每个排序，对于N T T T个发射天线获得N检测后的SNR，并且用于确定N T T T T T T T T T T T T N T N T N T T T T N T T N T N T T N T T N T N T 如果后检测SNR比最小所需SNR更差，速率为零。 基于N SUB数据速率对每个排序计算总体数据速率。 选择具有最高总数据速率的排序使用。 按照所选择的排序和发送的数据速率处理多达N个T个符号流。 所发送的符号流根据所选择的顺序被恢复。

公开(公告)号：US20080261582A1

公开(公告)日：2008-10-23

申请号：US12056033

申请日：2008-03-26

申请人： Sandip Sarkar ,  Naga Bhushan ,  Tamer Kadous ,  Aamod Khandekar ,  Parag Arun Agashe

发明人： Sandip Sarkar ,  Naga Bhushan ,  Tamer Kadous ,  Aamod Khandekar ,  Parag Arun Agashe

IPC分类号： H04Q7/20 ,  H04M1/00

CPC分类号： H04L27/3488 ,  H04L12/1886 ,  H04L12/189 ,  H04L27/2602 ,  H04W72/005

摘要： Method and apparatus that provide for broadcast multicast services in an ultra mobile broadband network are disclosed. A broadcast transmission structure provides for efficient indexing of subbands reserved for BCMCS. Transmissions on the logical channels are segmented into error control blocks beginning with zero or one MAC packet received by a MAC layer. A transmitting entity appends parameters relating to content change within a next ultraframe at end of every broadcast packet that is not a stuffing packet. A mapping message of multiple Physical Layer groups addresses a single logical channel when SFN (Single Frequency Network) coverage of an associated subband group is different from SFN coverage of the logical channel.

摘要翻译： 公开了在超移动宽带网络中提供广播多播服务的方法和装置。 广播传输结构提供了为BCMCS保留的子带的有效索引。 在逻辑信道上的传输被分割为以由MAC层接收的零个或一个MAC分组开始的错误控制块。 发送实体在不是填充分组的每个广播分组的结尾附加在下一个超帧内的与内容变化相关的参数。 当相关联的子带组的SFN（单频网络）覆盖不同于逻辑信道的SFN覆盖时，多个物理层组的映射消息寻址单个逻辑信道。

公开(公告)号：US07184713B2

公开(公告)日：2007-02-27

申请号：US10176567

申请日：2002-06-20

申请人： Tamer Kadous ,  Ivan Jesus Fernandez-Corbaton

发明人： Tamer Kadous ,  Ivan Jesus Fernandez-Corbaton

IPC分类号： H04B17/00

CPC分类号： H04W28/22 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0071 ,  H04L1/0675 ,  H04L1/16 ,  H04L1/20 ,  H04L25/0204 ,  H04L27/2626 ,  H04L27/2647 ,  H04W24/00 ,  H04W52/26

摘要： Techniques to determine a set of rates for a set of data streams to be transmitted in a multi-channel communication system. A group of transmission channels to be used for each data stream is initially identified. An equivalent system for each group is then defined to have an AWGN (or flat) channel and a spectral efficiency equal to the average spectral efficiency of the transmission channels in the group. A metric for each group is then derived based on the associated equivalent system, e.g., set to the SNR needed by the equivalent system to support the average spectral efficiency. A rate for each data stream is then determined based on the metric associated with the data stream. The rate is deemed to be supported by the communication system if the SNR required to support the data rate by the communication system is less than or equal to the metric.

摘要翻译： 确定要在多通道通信系统中传输的一组数据流的速率集合的技术。 最初识别要用于每个数据流的一组传输信道。 然后将每个组的等效系统定义为具有等于组中传输信道的平均频谱效率的AWGN（或平坦）信道和频谱效率。 然后基于相关联的等效系统导出每个组的度量，例如，设置为等效系统所需的SNR以支持平均频谱效率。 然后基于与数据流相关联的度量来确定每个数据流的速率。 如果由通信系统支持数据速率所需的SNR小于或等于该度量，则该速率被认为是由通信系统支持的。

公开(公告)号：US20070041464A1

公开(公告)日：2007-02-22

申请号：US11377458

申请日：2006-03-15

申请人： Byoung-Hoon Kim ,  Tamer Kadous

发明人： Byoung-Hoon Kim ,  Tamer Kadous

IPC分类号： H04L1/02

CPC分类号： H04L1/0026 ,  H04B7/061 ,  H04B7/0671 ,  H04L1/06 ,  H04L1/20 ,  H04W52/42

摘要： Techniques for transmitting data from virtual antennas instead of physical antennas are described. Each virtual antenna may be mapped to some or all physical antennas by a different mapping. The performance of different sets of at least one virtual antenna is evaluated based on one or more metrics such as signal quality, throughput, overall rate, and so on. The virtual antenna set with the best performance is selected for use. If the virtual antenna selection is performed by the receiver, then channel state information for the selected virtual antenna set may be sent to the transmitter. The channel state information may convey the selected virtual antenna(s), the signal quality or rate(s) for the selected virtual antenna(s), one or more preceding matrices used to form the selected virtual antenna(s), and so on. The transmitter and/or receiver use the selected virtual antenna(s) for data transmission.

摘要翻译： 描述了用于从虚拟天线而不是物理天线发送数据的技术。 每个虚拟天线可以通过不同的映射映射到一些或全部物理天线。 基于一个或多个度量（如信号质量，吞吐量，总体速率等）来评估不同组的至少一个虚拟天线的性能。 选择具有最佳性能的虚拟天线组使用。 如果由接收机执行虚拟天线选择，则可以将所选择的虚拟天线组的信道状态信息发送到发射机。 信道状态信息可以传送所选择的虚拟天线，所选择的虚拟天线的信号质量或速率，用于形成所选择的虚拟天线的一个或多个以前的矩阵，等等 。 发射机和/或接收机使用所选择的虚拟天线进行数据传输。

公开(公告)号：US07177351B2

公开(公告)日：2007-02-13

申请号：US10624241

申请日：2003-07-21

申请人： Tamer Kadous

发明人： Tamer Kadous

IPC分类号： H04B3/46

CPC分类号： H04L1/20 ,  H04B7/0417 ,  H04L1/0002 ,  H04L1/0017 ,  H04L1/06 ,  H04L1/0631

摘要： Techniques to determine data rates for a number of data streams transmitted via a number of transmission channels (or transmit antennas) in a multi-channel (e.g., MIMO) communication system. In one method, the “required” SNR for each data rate to be used is initially determined, with at least two data rates being unequal. The “effective” SNR for each data stream is also determined based on the received SNR and successive interference cancellation processing at the receiver to recover the data streams. The required SNR for each data stream is then compared against its effective SNR. The data rates are deemed to be supported if the required SNR for each data stream is less than or equal to its effective SNR. A number of sets of data rates may be evaluated, and the rate set associated with the minimum received SNR may be selected for use for the data streams.

摘要翻译： 确定通过多信道（例如，MIMO）通信系统中的多个传输信道（或发射天线）发送的多个数据流的数据速率的技术。 在一种方法中，首先确定要使用的每个数据速率的“所需”SNR，其中至少两个数据速率是不相等的。 每个数据流的“有效”SNR也是基于收到的SNR和在接收机处的连续干扰消除处理来确定的，以恢复数据流。 然后将每个数据流的所需SNR与其有效SNR进行比较。 如果每个数据流的所需SNR小于或等于其有效SNR，则视为支持数据速率。 可以评估多组数据速率，并且可以选择与最小接收SNR相关联的速率设置用于数据流。

公开(公告)号：US20060274836A1

公开(公告)日：2006-12-07

申请号：US11445377

申请日：2006-05-31

申请人： Hemanth Sampath ,  Tamer Kadous

发明人： Hemanth Sampath ,  Tamer Kadous

IPC分类号： H04B14/04 ,  H04L1/02

CPC分类号： H04L25/03242 ,  H03M13/45 ,  H04B7/04 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0048 ,  H04L1/0066 ,  H04L1/06 ,  H04L1/0631 ,  H04L1/0656 ,  H04L25/03197 ,  H04L27/2601 ,  H04L27/38 ,  H04L2025/03414

摘要： Methods and apparatuses for decoding codewords received over a MIMO channel are provided. According to one aspect of the disclosure, a cost function is computed for each constellation point of an Mth rank or spatial layer, and Ncand of those constellation points having minimum cost are preserved as candidate points, where Ncand is a parameter specified to the decoding algorithm. In addition, a cost function may be computed for all possible transitions from the Ncand candidate points of the Mth rank to all possible constellation points of the (M-1)th spatial layer, and Ncand of those transitions having minimum cost are preserved as candidate points. The process is repeated for all spatial layers, resulting in the identification of Ncand candidate codewords and their associated cost functions.

摘要翻译： 提供了用于解码通过MIMO信道接收的码字的方法和装置。 根据本公开的一个方面，针对第M等级或空间层的每个星座点计算成本函数，并且将具有最小成本的那些星座点的N≠N保存为候选点，其中N cand 是对解码算法指定的参数。 另外，对于从第M级的N个候选点到第（M-1）个空间层的所有可能的星座点的所有可能的转换，可以计算成本函数，并且N _{cand 被保留为候选点。 对所有空间层重复该过程，导致识别N候选码字及其相关联的成本函数。}

公开(公告)号：US20060233131A1

公开(公告)日：2006-10-19

申请号：US11261822

申请日：2005-10-27

申请人： Dhananjay Gore ,  Alexei Gorokhov ,  Tingfang Ji ,  Aamod Khandekar ,  Tamer Kadous

发明人： Dhananjay Gore ,  Alexei Gorokhov ,  Tingfang Ji ,  Aamod Khandekar ,  Tamer Kadous

IPC分类号： H04Q7/00

CPC分类号： H04W72/08 ,  H04B1/7143 ,  H04B7/043 ,  H04B7/0632 ,  H04B7/065 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/20 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0051 ,  H04L5/0057 ,  H04L5/006

摘要： Apparatuses and methodologies are described that enhance performance in a wireless communication system using beamforming transmissions. According to one aspect, the channel quality is monitored. Channel quality indicators can be used to select a scheduling technique, such as space division multiplexing (SDM), multiple-input multiple output (MIMO) transmission and opportunistic beamforming for one or more user devices. In addition, the CQI can be used to determine the appropriate beam assignment or to update the beam pattern.

摘要翻译： 描述了使用波束成形传输来增强在无线通信系统中的性能的装置和方法。 根据一个方面，监视信道质量。 信道质量指示符可以用于选择诸如空分复用（SDM），多输入多输出（MIMO）传输和一个或多个用户设备的机会波束成形的调度技术。 另外，可以使用CQI来确定适当的波束分配或更新波束图案。

公开(公告)号：US20060203794A1

公开(公告)日：2006-09-14

申请号：US11186152

申请日：2005-07-20

申请人： Hemanth Sampath ,  Tamer Kadous ,  Alexei Gorokhov ,  Dhanajay Gore

发明人： Hemanth Sampath ,  Tamer Kadous ,  Alexei Gorokhov ,  Dhanajay Gore

IPC分类号： H04B7/208

CPC分类号： H04B7/0417 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0632 ,  H04L5/023 ,  H04L25/0224 ,  H04L27/261

摘要： Methods and apparatuses are disclosed that utilize information from less than all transmission paths from a transmitter to form beamforming weights for transmission. In addition, methods and apparatuses are disclosed that utilize channel information, such as CQI, eigenbeam weights, and/or channel estimates, to form beamforming weights.

摘要翻译： 公开了利用来自发射机的小于所有传输路径的信息以形成用于传输的波束形成权重的方法和装置。 此外，公开了利用诸如CQI，本征光束权重和/或信道估计之类的信道信息来形成波束成形权重的方法和装置。

公开(公告)号：US07095790B2

公开(公告)日：2006-08-22

申请号：US10375191

申请日：2003-02-25

申请人： Ranganathan Krishnan ,  Anand D. Subramaniam ,  Tamer Kadous

发明人： Ranganathan Krishnan ,  Anand D. Subramaniam ,  Tamer Kadous

IPC分类号： H04K1/10 ,  H04J11/00

CPC分类号： H04W52/42 ,  H04B7/0667 ,  H04L5/0023 ,  H04L5/0048

摘要： Pilot and data transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation are provided. Subband multiplexing is used to avoid interference resulting from transmitting multiple signals simultaneously from multiple antennas. M usable subbands are initially arranged to form multiple groups of subbands, with each group including a different subset of the usable subbands. Each of T transmit antennas is then assigned one or possibly more subband groups for pilot transmission and typically one subband group for data transmission. Pilot and data may then be transmitted from each antenna on the subbands assigned to that antenna for pilot and data transmission. For each transmit antenna, the transmit power for each assigned subband may be scaled higher such that all of the total transmit power available for the antenna is used for transmission. Pilot and/or data may be transmitted simultaneously from all T antennas on all usable subbands without causing mutual interference.