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132 条记录 (耗时 0.022 秒)

    Reception of H-ARQ transmissions with interference cancellation in a quasi-orthogonal communication system
    16.
    发明授权
    Reception of H-ARQ transmissions with interference cancellation in a quasi-orthogonal communication system 有权
    在准正交通信系统中接收具有干扰消除的H-ARQ传输

    公开(公告)号：US07554948B2

    公开(公告)日：2009-06-30

    申请号：US11147830

    申请日：2005-06-07

    申请人： Ayman Fawzy Naguib ,  Alexei Gorokhov ,  Dhananjay Gore ,  Tingfang Ji ,  Arak Sutivong

    发明人： Ayman Fawzy Naguib ,  Alexei Gorokhov ,  Dhananjay Gore ,  Tingfang Ji ,  Arak Sutivong

    IPC分类号： H04W4/00

    CPC分类号： H04L1/1819 ,  H04B2001/7152 ,  H04L5/0023 ,  H04L25/0224

    摘要： To receive packets with interference cancellation, block transmissions for the packets are received on time-frequency blocks used by these packets. Receiver spatial processing is performed on input symbols to obtain detected symbols. Each packet is demodulated and decoded based on all detected symbols obtained for all block transmissions received for the packet. For each packet that is decoded correctly, the transmission for the packet is terminated, the interference due to the packet is estimated, and the estimated interference is subtracted from the input symbols for all time-frequency blocks used by the packet. Receiver spatial processing is performed on the interference-canceled symbols to obtain new detected symbols for all time-frequency blocks used by all correctly decoded packets. Each packet decoded in error and overlapping at least partially with any correctly decoded packet may be demodulated and decoded based on all detected symbols available for that packet.

    摘要翻译： 为了接收具有干扰消除的分组，在这些分组使用的时间 - 频率块上接收分组的块传输。 对输入符号执行接收机空间处理以获得检测符号。 基于为分组接收到的所有块传输获得的所有检测到的符号，对每个分组进行解调和解码。 对于正确解码的每个分组，分组的传输被终止，估计由于分组引起的干扰，并且从分组使用的所有时间频率块的输入符号中减去所估计的干扰。 对干扰消除的符号进行接收机空间处理，以获得由所有正确解码的分组使用的所有时间频率块的新的检测符号。 至少部分地与任何正确解码的分组进行错误解码和重叠的每个分组可以基于可用于该分组的所有检测到的符号进行解调和解码。

    Power control and overlapping control for a quasi-orthogonal communication system
    17.
    发明授权
    Power control and overlapping control for a quasi-orthogonal communication system 有权
    准正交通信系统的功率控制和重叠控制

    公开(公告)号：US07512412B2

    公开(公告)日：2009-03-31

    申请号：US11158587

    申请日：2005-06-21

    申请人： Murat Mese ,  Ayman Fawzy Naguib ,  Arak Sutivong ,  Dhananjay Gore ,  Alexei Gorokhov ,  Tingfang Ji

    发明人： Murat Mese ,  Ayman Fawzy Naguib ,  Arak Sutivong ,  Dhananjay Gore ,  Alexei Gorokhov ,  Tingfang Ji

    IPC分类号： H04B7/00 ,  H04Q7/20

    CPC分类号： H04W52/243 ,  H04W52/34

    摘要： Techniques for controlling transmit power and the amount of overlapping in a quasi-orthogonal system are described. A base station for a sector receives transmissions from terminals in that sector and neighbor sectors and determines performance metrics (e.g., overall throughput) and/or QoS metrics (e.g., minimum data rate) for the terminals in the sector. The base station updates an overlapping factor based on the performance metrics and updates a QoS power control parameter based on the QoS metrics. The overlapping factor indicates the average number of overlapping transmissions sent simultaneously on each time-frequency block usable for data transmission. The QoS power control parameter ensures that the terminals in the sector can achieve minimum QoS requirements. A power control mechanism with multiple loops is used to adjust the transmit power of each terminal. The overlapping factor and QoS power control parameter are updated by two of the loops.

    摘要翻译： 描述了用于控制发射功率的技术和准正交系统中的重叠量。 用于扇区的基站从该扇区和相邻扇区中的终端接收传输，并确定扇区中的终端的性能度量（例如总吞吐量）和/或QoS度量（例如，最小数据速率）。 基站基于性能度量来更新重叠因子，并且基于QoS度量来更新QoS功率控制参数。 重叠因子表示可用于数据传输的每个时间频率块上同时发送的重叠传输的平均数。 QoS功率控制参数确保了扇区中的终端可以达到最低的QoS要求。 使用具有多个环路的功率控制机构来调整每个终端的发射功率。 重叠因子和QoS功率控制参数由两个循环更新。

    MC-CDMA MULTIPLEXING IN AN ORTHOGONAL UPLINK
    18.
    发明申请
    MC-CDMA MULTIPLEXING IN AN ORTHOGONAL UPLINK 有权

    公开(公告)号：US20110235685A1

    公开(公告)日：2011-09-29

    申请号：US13090220

    申请日：2011-04-19

    申请人： Arak Sutivong ,  Avneesh Agrawal

    发明人： Arak Sutivong ,  Avneesh Agrawal

    IPC分类号： H04B1/713

    CPC分类号： H04L5/0021 ,  H04B1/692 ,  H04B1/713 ,  H04J13/18

    摘要： Techniques are provided to support multi-carrier code division multiple access (MC-CDMA) in an orthogonal uplink of a wireless communication system. A method of wireless multi-carrier communications comprises dividing sub-carriers on an uplink into non-overlapping groups, allocating a time-frequency block including a hopping duration and a non-overlapped group, respectively, assigning a different set of orthogonal codes to each user, spreading data (or pilot) symbols of each user over the allocated time-frequency block, wherein the data (or pilot) symbols of each user are spread using the different set of orthogonal codes assigned to each user, mapping each data (or pilot) symbol to a modulation symbol in the time-frequency block, generating an orthogonal waveform based on the mapped symbols, and transmitting the orthogonal waveform.

    SYSTEMS AND METHODS THAT UTILIZE A CAPACITY-BASED SIGNAL-TO-NOISE RATIO TO PREDICT AND IMPROVE MOBILE COMMUNICATION
    19.
    发明申请
    SYSTEMS AND METHODS THAT UTILIZE A CAPACITY-BASED SIGNAL-TO-NOISE RATIO TO PREDICT AND IMPROVE MOBILE COMMUNICATION 审中-公开
    利用基于能力的信号与噪声比进行预测和改进移动通信的系统和方法

    公开(公告)号：US20100029265A1

    公开(公告)日：2010-02-04

    申请号：US12577659

    申请日：2009-10-12

    申请人： Aamod Khandekar ,  Avneesh Agrawal ,  Arak Sutivong ,  Edward Harrison Teague

    发明人： Aamod Khandekar ,  Avneesh Agrawal ,  Arak Sutivong ,  Edward Harrison Teague

    IPC分类号： H04W24/00

    CPC分类号： H04W52/241 ,  H04L1/0001 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/0066 ,  H04L1/20 ,  H04L1/206 ,  H04W52/24

    摘要： Techniques for utilizing a capacity-based effective signal-to-noise ratio (SNR) to improve wireless communication are described herein. In an embodiment, a mobile terminal can determine the effective SNR from a forward link channel using pilot/data symbols. The mobile terminal can convey the effective SNR to a base station. In order to minimize transmission overhead, the mobile terminal can quantize the effective SNR prior to transmitting it to the base station. In another embodiment, the base station can determine the effective SNR from a reverse link. The base station can utilize the effective SNR to facilitate scheduling transmissions from the mobile terminal, transmitting power control commands to the mobile terminal, and determining a supporting data rate for the mobile terminal, for example. Suitable SNRs include constrained, unconstrained, average, and/or approximated effective SNRs. In addition, various filters, such as an averaging filter, can be utilized to further process the effective SNR.

    摘要翻译： 这里描述了利用基于容量的有效信噪比（SNR）来改善无线通信的技术。 在一个实施例中，移动终端可以使用导频/数据符号从前向链路信道确定有效SNR。 移动终端可以将有效SNR传送给基站。 为了最小化传输开销，移动终端可以在将其发送到基站之前量化有效SNR。 在另一个实施例中，基站可以从反向链路确定有效SNR。 基站可以利用有效SNR来促进调度来自移动终端的传输，向移动终端发送功率控制命令，以及确定移动终端的支持数据速率。 合适的SNR包括约束的，无约束的，平均的和/或近似的有效SNR。 此外，可以使用诸如平均滤波器的各种滤波器来进一步处理有效SNR。

    REVERSE LINK POWER CONTROL IN AN ORTHOGONAL SYSTEM
    20.
    发明申请
    REVERSE LINK POWER CONTROL IN AN ORTHOGONAL SYSTEM 有权
    正交系统中的反向链路功率控制

    公开(公告)号：US20090274232A1

    公开(公告)日：2009-11-05

    申请号：US12504085

    申请日：2009-07-16

    申请人： Arak Sutivong ,  Avneesh Agrawal

    发明人： Arak Sutivong ,  Avneesh Agrawal

    IPC分类号： H04K1/10

    CPC分类号： H04W52/367 ,  H04W52/12 ,  H04W52/146 ,  H04W52/20 ,  H04W52/24 ,  H04W52/286 ,  H04W52/48

    摘要： A closed-loop reverse-link power control algorithm for a frequency hopping orthogonal frequency division multiple access (FH-OFDMA) system is described. The power control algorithm adjusts the user's transmit power based on effective carrier-to-interference (C/I) and Received-Power-Over-Thermal (RpOT) measurements. The algorithm is inherently stable and is effective for FH-OFDMA systems with retransmissions.

    摘要翻译： 描述了用于跳频正交频分多址（FH-OFDMA）系统的闭环反向链路功率控制算法。 功率控制算法基于有效的载波干扰（C / I）和接收功率过热（RpOT）测量来调整用户的发射功率。 该算法本质上是稳定的，对于具有重传的FH-OFDMA系统是有效的。