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    Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation
    52.
    发明申请
    Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation 有权

    公开(公告)号：US20060269009A1

    公开(公告)日：2006-11-30

    申请号：US11501130

    申请日：2006-08-07

    申请人： Ranganathan Krishnan ,  Anand Subramaniam ,  Tamer Kadous

    发明人： Ranganathan Krishnan ,  Anand Subramaniam ,  Tamer Kadous

    IPC分类号： H04K1/10 ,  H04L1/02

    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.

    Performance based rank prediction for MIMO design
    53.
    发明申请
    Performance based rank prediction for MIMO design 有权

    公开(公告)号：US20060133521A1

    公开(公告)日：2006-06-22

    申请号：US11021791

    申请日：2004-12-22

    申请人： Hemanth Sampath ,  Tamer Kadous

    发明人： Hemanth Sampath ,  Tamer Kadous

    IPC分类号： H04K1/10

    CPC分类号： H04L1/0618 ,  H04B7/0486 ,  H04L27/2608

    摘要： The performance of a Single Code Word (SCW) design with low complexity MMSE receiver & rank prediction is similar to the Multiple Code Word (MCW) design with successive interference cancellation (SIC). A method of rank prediction comprises calculating MIMO channel matrices corresponding to layer transmissions for each tone, calculating signal-to-noise ratios (SNRs) for each tone based on the MIMO channel matrices, mapping the SNR for each tone to generate effective SNRs for each layer transmission, selecting a highest packet format (PF) with an SNR threshold less than the effective SNR for each layer transmission, maximizing an over-all spectral efficiency based on the selected highest packet formats for each layer transmission, and selecting a rank based on maximizing an over-all spectral efficiency.

    Successive interference cancellation receiver processing with selection diversity
    54.
    发明授权
    Successive interference cancellation receiver processing with selection diversity 失效
    连续干扰消除接收机处理与选择分集

    公开(公告)号：US06917821B2

    公开(公告)日：2005-07-12

    申请号：US10670079

    申请日：2003-09-23

    申请人： Tamer Kadous ,  Anand D. Subramaniam

    发明人： Tamer Kadous ,  Anand D. Subramaniam

    IPC分类号： H04J99/00 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04B1/38

    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。

    Data transmission with non-uniform distribution of data rates for a multiple-input multiple-output (MIMO) system
    55.
    发明授权
    Data transmission with non-uniform distribution of data rates for a multiple-input multiple-output (MIMO) system 有权
    数据传输与多输入多输出（MIMO）系统的数据速率分布不均匀

    公开(公告)号：US06636568B2

    公开(公告)日：2003-10-21

    申请号：US10087503

    申请日：2002-03-01

    申请人： Tamer Kadous

    发明人： Tamer Kadous

    IPC分类号： H04B1404

    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。

    Precoding and SDMA support
    58.
    发明授权
    Precoding and SDMA support 有权
    预编码和SDMA支持

    公开(公告)号：US09136974B2

    公开(公告)日：2015-09-15

    申请号：US11401979

    申请日：2006-04-10

    申请人： Alexei Gorokhov ,  Dhananjay Ashok Gore ,  Gwendolyn D. Barriac ,  Jibing Wang ,  Tamer Kadous

    发明人： Alexei Gorokhov ,  Dhananjay Ashok Gore ,  Gwendolyn D. Barriac ,  Jibing Wang ,  Tamer Kadous

    IPC分类号： H04W72/00 ,  H04L1/00 ,  H04W72/04 ,  H04B7/04 ,  H04B7/06 ,  H04L1/06

    CPC分类号： H04L1/0001 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0639 ,  H04B7/0663 ,  H04B7/0689 ,  H04L1/06 ,  H04W72/04

    摘要： Embodiments are described in connection with enhancing performance in a wireless communication system using codebook technology. According to an embodiment is a method for enhancing performance in a wireless communication environment. The method can include receiving a user preference for a transmission mode, associating the user preference with an entry or entries in a codebook, and assigning the user to a transmission mode corresponding to the entry or entries. The transmission mode can be one of a precoding, space division multiple access (SDMA), SDMA precoding, multiple input multiple output (MIMO), MIMO precoding, MIMO-SDMA and a diversity. Each entry can correspond to a transmission mode.

    摘要翻译： 结合增强使用码本技术的无线通信系统中的性能来描述实施例。 根据实施例是用于增强无线通信环境中的性能的方法。 该方法可以包括接收用户对传输模式的偏好，将用户偏好与码本中的条目或条目相关联，并将用户分配给与条目或条目相对应的传输模式。 传输模式可以是预编码，空分多址（SDMA），SDMA预编码，多输入多输出（MIMO），MIMO预编码，MIMO-SDMA和分集之一。 每个条目可以对应于传输模式。

    CQI and rank prediction for list sphere decoding and ML MIMO receivers
    59.
    发明授权
    CQI and rank prediction for list sphere decoding and ML MIMO receivers 有权
    用于列表球体解码和ML MIMO接收机的CQI和秩预测

    公开(公告)号：US08971461B2

    公开(公告)日：2015-03-03

    申请号：US11441652

    申请日：2006-05-25

    申请人： Hemanth Sampath ,  Tamer Kadous

    发明人： Hemanth Sampath ,  Tamer Kadous

    IPC分类号： H04L1/00 ,  H04B7/12 ,  H04B1/10 ,  H04B7/04 ,  H04B7/06 ,  H04L1/06 ,  H04L25/03

    CPC分类号： H04B7/12 ,  H04B1/1027 ,  H04B7/0417 ,  H04B7/063 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/0656 ,  H04L1/0675 ,  H04L25/03242 ,  H04L2025/03426

    摘要： Systems and methodologies are described that facilitate integrating a list-sphere decoding design in a multiple input-multiple output (MIMO wireless communication environment. According to various aspects, optimal rank selection and CQI computation for an optimal rank can be performed in conjunction with a non-linear receiver, such as a maximum life (ML) MMSE receiver, a non-linear receiver with a list-sphere decoder, and the like. Optimal rank selection can be performed using a maximum rank selection protocol, a channel capacity-based protocol, or any other suitable protocol that facilitates rank selection, and CQI information can be generated based in part on effective SNRs determined with regard to a selected optimal rank.

    摘要翻译： 描述了有助于将多个输入多输出（MIMO无线通信环境）中的列表球体解码设计进行集成的系统和方法，根据各个方面，最佳秩选择和最佳秩的CQI计算可以结合非 - 线性接收机，例如最大寿命（ML）MMSE接收机，具有列表球体解码器的非线性接收机等。最佳秩选择可以使用最大秩选择协议，基于信道容量的协议 或有助于等级选择的任何其它合适的协议，并且可以部分地基于针对所选择的最优等级确定的有效SNR来生成CQI信息。