Method and system for supporting multiple hybrid automatic repeat request processes per transmission time interval
    51.
    发明授权
    Method and system for supporting multiple hybrid automatic repeat request processes per transmission time interval 有权
    每个传输时间间隔支持多个混合自动重传请求过程的方法和系统

    公开(公告)号:US08074137B2

    公开(公告)日:2011-12-06

    申请号:US11670202

    申请日:2007-02-01

    IPC分类号: H04L1/18 G08C25/02

    摘要: A method and system for supporting multiple hybrid automatic repeat request (H-ARQ) processes per transmission time interval (TTI) are disclosed. A transmitter and a receiver include a plurality of H-ARQ processes to transmit and receive multiple transport blocks (TBs) simultaneously per TTI. The transmitter generates a plurality of TBs and assigns the TBs to multiple H-ARQ processes. The transmitter sends control information for the TBs and H-ARQ processes associated with the TBs to the receiver. The transmitter then sends the TBs using multiple H-ARQ processes simultaneously per TTI. After receiving the TBs, the receiver sends feedback to each of the TBs indicating successful or unsuccessful receipt of each of the TBs to the transmitter. The control information and the feedback may be sent via a layer 1 or layer 2/3 control part.

    摘要翻译: 公开了一种用于支持每个传输时间间隔(TTI)的多个混合自动重复请求(H-ARQ)处理的方法和系统。 发射机和接收机包括多个H-ARQ过程,用于每TTI同时发送和接收多个传输块(TB)。 发射机生成多个TB,并将TB分配给多个H-ARQ进程。 发射机将与TB相关联的TB和H-ARQ进程的控制信息发送给接收机。 发射机随后每TTI同时使用多个H-ARQ进程发送TB。 在接收到TB之后,接收机向每个TB发送反馈,指示每个TB向发射机的成功或不成功的接收。 控制信息和反馈可以经由层1或层2/3控制部分发送。

    Method and apparatus for scaling a signal for improving performance of a receiver in a MIMO system
    52.
    发明授权
    Method and apparatus for scaling a signal for improving performance of a receiver in a MIMO system 有权
    用于缩小信号以提高MIMO系统中的接收机的性能的方法和装置

    公开(公告)号:US07869536B2

    公开(公告)日:2011-01-11

    申请号:US11753121

    申请日:2007-05-24

    IPC分类号: H04L1/02

    摘要: A multiple-input multiple-output (MIMO) receiver includes a MIMO decoder, a pre-scaling unit, a demapper, and a post-scaling unit. The MIMO decoder performs a MIMO decoding on received signals to decouple a plurality of symbols transmitted via a plurality of data streams. Both pre-demapping scaling and post-demapping scaling are performed to improve the performance of the receiver. A pre-scaling coefficient is applied to the symbols by the pre-scaling unit to generate pre-scaled symbols. The pre-scaled symbols are converted to soft bits by the demapper. The post-scaling unit then applies a post-scaling coefficient to the soft bits. The post-scaling coefficient is a signal-to-interference and noise ratio (SINR). Cross interference is taken into account in post-demapping scaling to obtain more accurate soft bits for subsequent decoding. The present invention is applicable to both a multi-carrier system, (such as orthogonal frequency division multiplexing (OFDM)), and a single carrier system.

    摘要翻译: 多输入多输出(MIMO)接收机包括MIMO解码器,预缩放单元,解映射器和后定标单元。 MIMO解码器对接收到的信号执行MIMO解码以去耦经由多个数据流发送的多个符号。 执行预映射缩放和后解映射缩放以提高接收机的性能。 通过预缩放单元将预缩放系数应用于符号以生成预缩放符号。 预分解符号由解映射器转换为软位。 然后,缩放后单元将比例缩放系数应用于软比特。 后缩放系数是信噪比(SINR)。 在后解映射缩放中考虑到交叉干扰,以获得更准确的软比特用于后续解码。 本发明适用于多载波系统(例如正交频分复用(OFDM))和单载波系统。

    METHOD AND APPARATUS FOR REDUCING A PEAK-TO-AVERAGE POWER RATIO IN A MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM
    55.
    发明申请
    METHOD AND APPARATUS FOR REDUCING A PEAK-TO-AVERAGE POWER RATIO IN A MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM 审中-公开
    用于减少多输入多输出系统中的峰值平均功率比的方法和装置

    公开(公告)号:US20080260054A1

    公开(公告)日:2008-10-23

    申请号:US11839773

    申请日:2007-08-16

    IPC分类号: H04L27/28

    摘要: A method and apparatus for reducing a peak-to-average power ratio (PAPR) in a multiple-input multiple-output (MIMO) wireless communication system are disclosed. Transmit beamforming or precoding is performed on transmit symbols based on a channel matrix. For feedback, channel matrices may be averaged over multiple subcarriers and the averaged channel matrices may be further quantized. In order to reduce the PAPR, amplitude clipping may be performed on the symbols after the transmit processing. The amplitude clipping may be performed by hard clipping, soft clipping, or smooth clipping.

    摘要翻译: 公开了一种减少多输入多输出(MIMO)无线通信系统中的峰均功率比(PAPR)的方法和装置。 基于信道矩阵对发射符号执行发射波束形成或预编码。 对于反馈,信道矩阵可以在多个子载波上进行平均,并且平均的信道矩阵可以被进一步量化。 为了减少PAPR,可以对发送处理之后的符号执行幅度削波。 幅度削波可以通过硬削波,软削波或平滑削波来执行。

    TRANSMISSION OF ACK/NACK AND TRANSMIT POWER CONTROL FEEDBACK IN EVOLVED UTRA
    56.
    发明申请
    TRANSMISSION OF ACK/NACK AND TRANSMIT POWER CONTROL FEEDBACK IN EVOLVED UTRA 审中-公开
    发送ACK / NACK和发送功率控制反馈在演进的UTRA

    公开(公告)号:US20080225822A1

    公开(公告)日:2008-09-18

    申请号:US12048262

    申请日:2008-03-14

    IPC分类号: H04J1/00

    CPC分类号: H04L5/023

    摘要: A method for transmitting feedback information for a wireless transmit receive unit (WTRU) includes multiplexing the feedback information with an uplink shared channel, mapping the multiplexed feedback information to orthogonal frequency division multiplex (OFDM) symbols and transmitting the feedback information to an e Node B. The method also includes multiplexing the feedback information with the uplink shared channel using distributed frequency division multiplexing (FDM), mapping the feedback information to a first OFDM symbol, and distributing the mapped feedback information equidistantly across the transmission bandwidth.

    摘要翻译: 用于发送用于无线发射接收单元(WTRU)的反馈信息的方法包括:将反馈信息与上行链路共享信道进行复用,将多路复用的反馈信息映射到正交频分复用(OFDM)符号,并将反馈信息发送到e节点B 该方法还包括使用分布式频分复用(FDM)将反馈信息与上行链路共享信道进行多路复用,将反馈信息映射到第一OFDM符号,并将映射的反馈信息等距地分布在传输带宽上。

    METHOD AND APPARATUS FOR SCALING A SIGNAL FOR IMPROVING PERFORMANCE OF A RECEIVER IN A MIMO SYSTEM
    58.
    发明申请
    METHOD AND APPARATUS FOR SCALING A SIGNAL FOR IMPROVING PERFORMANCE OF A RECEIVER IN A MIMO SYSTEM 有权
    用于扩展用于提高MIMO系统中接收机性能的信号的方法和装置

    公开(公告)号:US20070280387A1

    公开(公告)日:2007-12-06

    申请号:US11753121

    申请日:2007-05-24

    IPC分类号: H04L1/02

    摘要: A multiple-input multiple-output (MIMO) receiver includes a MIMO decoder, a pre-scaling unit, a demapper, and a post-scaling unit. The MIMO decoder performs a MIMO decoding on received signals to decouple a plurality of symbols transmitted via a plurality of data streams. Both pre-demapping scaling and post-demapping scaling are performed to improve the performance of the receiver. A pre-scaling coefficient is applied to the symbols by the pre-scaling unit to generate pre-scaled symbols. The pre-scaled symbols are converted to soft bits by the demapper. The post-scaling unit then applies a post-scaling coefficient to the soft bits. The post-scaling coefficient is a signal-to-interference and noise ratio (SINR). Cross interference is taken into account in post-demapping scaling to obtain more accurate soft bits for subsequent decoding. The present invention is applicable to both a multi-carrier system, (such as orthogonal frequency division multiplexing (OFDM)), and a single carrier system.

    摘要翻译: 多输入多输出(MIMO)接收机包括MIMO解码器,预缩放单元,解映射器和后定标单元。 MIMO解码器对接收到的信号执行MIMO解码以去耦经由多个数据流发送的多个符号。 执行预映射缩放和后解映射缩放以提高接收机的性能。 通过预缩放单元将预缩放系数应用于符号以生成预缩放符号。 预分解符号由解映射器转换为软位。 然后,缩放后单元将比例缩放系数应用于软比特。 后缩放系数是信噪比(SINR)。 在后解映射缩放中考虑到交叉干扰,以获得更准确的软比特用于后续解码。 本发明适用于多载波系统(例如正交频分复用(OFDM))和单载波系统。

    Automatic gain control for a wireless transmit/receive unit in a time slotted data transmissions
    59.
    发明授权
    Automatic gain control for a wireless transmit/receive unit in a time slotted data transmissions 有权
    在时隙数据传输中对无线发射/接收单元进行自动增益控制

    公开(公告)号:US07197289B2

    公开(公告)日:2007-03-27

    申请号:US10613463

    申请日:2003-07-03

    IPC分类号: H04B1/06

    CPC分类号: H04W52/52

    摘要: A system and method for automatic gain control for a wireless transmit and receive unit in a time-slotted communications system includes initializing an automatic gain control loop, sampling a received signal, and estimating the power of the received signal. The estimated power of the received signal is compared with a reference power level and an error signal is generated based upon the difference between the estimated power and the reference power level. The error signals generated by a plurality of received signals are accumulated in an accumulator, and the value of the accumulator is looked up in a table to locate a control word for an attenuator. The control word is then passed to the attenuator to adjust the gain.

    摘要翻译: 用于时隙通信系统中的无线发射和接收单元的自动增益控制的系统和方法包括:初始化自动增益控制环路,对接收到的信号进行采样,以及估计接收信号的功率。 将接收信号的估计功率与参考功率电平进行比较,并且基于估计功率与参考功率电平之间的差产生误差信号。 由多个接收信号产生的误差信号被累加在累加器中,并且在表中查找累加器的值以定位衰减器的控制字。 然后将控制字传递给衰减器以调整增益。