利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

38 条记录 (耗时 0.018 秒)

    ULTRA-LOW LATENCY LTE DOWNLINK COMMUNICATIONS
    1.
    发明公开
    ULTRA-LOW LATENCY LTE DOWNLINK COMMUNICATIONS 审中-公开

    公开(公告)号：EP3742657A1

    公开(公告)日：2020-11-25

    申请号：EP20186034.3

    申请日：2015-09-21

    申请人： QUALCOMM Incorporated

    发明人： PATEL, Shimman ,  CHEN, Wanshi ,  GAAL, Peter ,  DAMNJANOVIC, Aleksandar ,  WEI, Yongbin ,  MALLADI, Durga Prasad ,  XU, Hao

    IPC分类号： H04L5/00

    摘要： A data structure for managing user equipment communications in a wireless communication system is presented. In some examples, the data structure may include one or more resource element blocks into which a frequency bandwidth of a downlink channel is divided within a symbol that defines a transmission time interval in a downlink subframe. Furthermore, the data structure may include a control region and a data region within at least one resource element block of the one or more resource element blocks. Additionally, the data structure may include a downlink resource grant, located within the control region, for a user equipment served by the downlink channel. In an additional aspect, a network entity and method for generating the example data structure are provided.

    PARTIAL DISCARDING OF CYCLIC PREFIX FOR EFFICIENT TDD OR HALF-DUPLEX FDD OPERATION
    5.
    发明公开
    PARTIAL DISCARDING OF CYCLIC PREFIX FOR EFFICIENT TDD OR HALF-DUPLEX FDD OPERATION 有权
    部分存储用于高效循环前缀的TDD或半双工PDD-OPERATION

    公开(公告)号：EP2195987A2

    公开(公告)日：2010-06-16

    申请号：EP08836076.3

    申请日：2008-09-30

    申请人： QUALCOMM Incorporated

    发明人： MONTOJO, Juan ,  MALLADI, Durga Prasad ,  PATEL, Shimman

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2647 ,  H04L5/1484 ,  H04L27/2607

    摘要： Techniques for performing partial cyclic prefix discarding are described. A user equipment (UE) may reduce the amount of cyclic prefix to discard for the last OFDM symbol prior to a switch from data reception to data transmission. This may allow the UE to complete data reception earlier and to switch to data transmission in a timely manner. In one design, the UE may receive a first OFDM symbol and discard a first amount of cyclic prefix for the first OFDM symbol. The UE may then receive a second OFDM symbol and discard a second amount of cyclic prefix for the second OFDM symbol. The second amount of cyclic prefix to discard may be determined based on the amount of time needed to switch from data reception to data transmission, which may be dependent on the amount of time advance between transmit timing and receive timing at the UE.

    JAMMER DETECTION AND SUPPRESSION FOR WIRELESS COMMUNICATION
    8.
    发明公开
    JAMMER DETECTION AND SUPPRESSION FOR WIRELESS COMMUNICATION 审中-公开
    STÖRUNGSERKENNUNGUND-UNTERDRÜCKUNGFÜRDRAHTLOSE KOMMUNIKATION

    公开(公告)号：EP2109938A2

    公开(公告)日：2009-10-21

    申请号：EP07874368.9

    申请日：2007-12-17

    申请人： QUALCOMM Incorporated

    发明人： GLAZKO, Serguei, A. ,  BECKMAN, James, Edward ,  PATEL, Shimman

    IPC分类号： H04B1/10 ,  H04L27/26

    CPC分类号： H04L27/2647 ,  H04B1/1036 ,  H04K3/228

    摘要： Techniques for detecting and suppressing jammers are described. A receiver may perform post-FFT jammer detection and pre-FFT jammer suppression. The receiver may transform an input signal to obtain a frequency-domain signal and may detect for jammers in the input signal based on the frequency-domain signal. The receiver may determine powers of a plurality of carriers based on the frequency-domain signal and may detect for jammers based on peaks in the powers of these carriers. The receiver may filter the input signal (e.g., with a notch filter) to suppress the detected jammers. Alternatively or additionally, the receiver may perform post-FFT jammer detection and post-FFT jammer suppression. The receiver may determine whether jammer is present on each carrier based on data power and channel power for that carrier. The receiver may modify (e.g., zero out or reduce) the frequency-domain signal on carriers with detected jammers.

    摘要翻译： 描述了用于检测和抑制干扰的技术。 接收机可以执行FFT后干扰检测和预FFT干扰抑制。 接收机可以变换输入信号以获得频域信号，并且可以基于频域信号来检测输入信号中的干扰。 接收机可以基于频域信号来确定多个载波的功率，并且可以基于这些载波的功率的峰值来检测干扰。 接收机可以过滤输入信号（例如，使用陷波滤波器）来抑制所检测到的干扰。 或者或另外，接收机可以执行FFT后干扰检测和FFT后干扰抑制。 接收机可以基于该载波的数据功率和信道功率来确定每个载波上是否存在干扰信号。 接收机可以利用检测到的干扰来修改（例如，零或降低）载波上的频域信号。

    TIMING ACQUISITION AND MODE AND GUARD DETECTION FOR AN OFDM TRANSMISSION
    9.
    发明公开
    TIMING ACQUISITION AND MODE AND GUARD DETECTION FOR AN OFDM TRANSMISSION 审中-公开
    一时间的确定和补偿模式和保护区间检测器与OFDM传输

    公开(公告)号：EP1938542A1

    公开(公告)日：2008-07-02

    申请号：EP06803906.4

    申请日：2006-09-20

    申请人： Qualcomm Incorporated

    发明人： GLAZKO, Serguei A. ,  REEVES, Jonathan R. ,  PATEL, Shimman

    IPC分类号： H04L27/26 ,  H04N7/24

    CPC分类号： H04L27/2666 ,  H04L27/2607 ,  H04L27/2662 ,  H04L27/2665 ,  H04N21/2383 ,  H04N21/4382

    摘要： Techniques for detecting mode and guard length and estimating timing offset for an OFDM transmission are described. Multiple hypotheses for different combinations of mode and guard length that might have been used for the OFDM transmission are evaluated. For each hypothesis, correlation is performed on received samples for a hypothesized guard interval to obtain correlation results. The energy of the hypothesized guard interval is determined. A first metric is derived based on the correlation results and the energy. The first metric may be filtered, e.g., averaged. Noise is estimated, e.g., based on a set of elements for the filtered first metric at locations determined by an estimated timing offset for the hypothesis. A second metric is derived based on the filtered first metric and the estimated noise. The second metric for all hypotheses may be used to determine the mode, guard length, and timing offset for the OFDM transmission.

    摘要翻译： 为了检测模式和保护长度和估算技术定时偏移在OFDM传输中描述。 也可能被用于OFDM传输的时尚和保护长度的不同组合的多个假设进行评估。 对于每个假设，相关性进行上采样为一个虚拟保护间隔，以获得相关结果接收。 对假定保护间隔的能量是确定性的开采。 第一度量基于所述相关结果和能量的。 第一度量可以被过滤，E. G.平均。 噪声估计，E. G.，基于在通过在估计的定时的偏移假说开采确定性位置的一组经滤波的第一度量元件。 第二度量基于经滤波的第一度量和估计的噪声的。 所有假设的第二度量可被用于确定性矿时尚，保护长度和定时用于OFDM传输偏移。

    DISCONTINUOUS TRANSMISSION (DTX) FRAME DETECTION IN WIRELESS COMMUNICATION SYSTEMS
    10.
    发明授权
    DISCONTINUOUS TRANSMISSION (DTX) FRAME DETECTION IN WIRELESS COMMUNICATION SYSTEMS 有权
    无线通信系统中的非连续传输（DTX）帧检测

    公开(公告)号：EP1570699B1

    公开(公告)日：2007-08-22

    申请号：EP03796971.4

    申请日：2003-12-10

    申请人： Qualcomm, Incorporated

    发明人： CHEN, Qingxin ,  PATEL, Shimman

    IPC分类号： H04Q7/38

    CPC分类号： H04L1/0061 ,  H04L1/0072 ,  H04L1/20 ,  H04L1/201

    摘要： Techniques to detect for DTX frames in a 'primary' transmission that may be sent in a non-continuous manner using a 'secondary' transmission that is sent during periods of no transmission for the primary transmission. The primary and secondary transmissions may be the ones sent on the F-DCCH and Forward Power Control Subchannel, respectively, in an IS-2000 system. In one method, a determination is first made whether or not a frame received for the primary transmission in a particular frame interval is a good frame (e.g., based on CRC). If the received frame is not a good frame, then a determination is next made whether the received frame is a DTX frame or an erased frame based on a number of metrics determined for the primary and secondary transmissions. The metrics may include symbol error rate of the received frame, secondary transmission (e.g., PC bit) energy, and received frame energy.

    摘要翻译： 用于检测“主”传输中的DTX帧的技术，其可以使用在主传输的无传输期间发送的“次要”传输以非连续方式发送。 主要和次要传输可以是在IS-2000系统中分别在F-DCCH和前向功率控制子信道上发送的传输。 在一种方法中，首先确定在特定帧间隔内针对主传输接收到的帧是否是好帧（例如，基于CRC）。 如果接收到的帧不是好的帧，则基于为主要传输和次要传输确定的多个度量来确定接收到的帧是DTX帧还是擦除帧。 度量可以包括所接收的帧的符号错误率，二次传输（例如PC比特）能量和接收到的帧能量。