利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

41 条记录 (耗时 0.025 秒)

    Varied signaling channels for a reverse link in a wireless communication system
    2.
    发明申请
    Varied signaling channels for a reverse link in a wireless communication system 有权
    用于无线通信系统中的反向链路的各种信令信道

    公开(公告)号：US20070097942A1

    公开(公告)日：2007-05-03

    申请号：US11261806

    申请日：2005-10-27

    申请人： Alexei Gorokhov ,  Aamod Khandekar ,  Edward Teague ,  Hemanth Sampath

    发明人： Alexei Gorokhov ,  Aamod Khandekar ,  Edward Teague ,  Hemanth Sampath

    IPC分类号： H04B7/216

    CPC分类号： H04B7/2656

    摘要： Signaling is efficiently sent on a configurable CDMA control segment. To send signaling, transmission parameters for the CDMA control segment for a serving sector are determined. These parameter may indicate the CDMA control segment size, the frames in which the CDMA control segment is sent, the signaling channels to be sent on the CDMA control segment, and so on. The enabled CDMA signaling channels for a terminal and the average transmission interval for each enabled CDMA signaling channel are determined. For each frame in which the CDMA control segment is sent, the signaling channels to be sent on the CDMA control segment in that frame are determined. The signaling for each signaling channel is processed (e.g., encoded, channelized, scaled, and scrambled). The processed signaling for all signaling channels is combined and mapped to a time-frequency region used for the CDMA control segment in the frame.

    摘要翻译： 在可配置的CDMA控制段上有效地发送信令。 为了发送信令，确定用于服务扇区的CDMA控制段的传输参数。 这些参数可以指示CDMA控制段大小，发送CDMA控制段的帧，在CDMA控制段上发送的信令信道等。 确定终端的使能的CDMA信令信道和每个使能的CDMA信令信道的平均传输间隔。 对于其中发送CDMA控制段的每个帧，确定要在该帧中的CDMA控制段上发送的信令信道。 处理每个信令信道的信令（例如，编码，信道化，缩放和加扰）。 所有信令信道的经处理的信令被组合并且被映射到帧中用于CDMA控制段的时间 - 频率区域。

    Channel estimation for an OFDM communication system with inactive subbands
    3.
    发明申请
    Channel estimation for an OFDM communication system with inactive subbands 有权
    具有无效子带的OFDM通信系统的信道估计

    公开(公告)号：US20050135509A1

    公开(公告)日：2005-06-23

    申请号：US10741524

    申请日：2003-12-19

    申请人： Ashok Mantravadi ,  Aamod Khandekar ,  Edward Teague ,  Tamer Kadous

    发明人： Ashok Mantravadi ,  Aamod Khandekar ,  Edward Teague ,  Tamer Kadous

    IPC分类号： H04L25/02 ,  H04L27/06

    CPC分类号： H04L25/022 ,  H04L25/0218 ,  H04L25/0232

    摘要： For channel estimation in a spectrally shaped wireless communication system, an initial frequency response estimate is obtained for a first set of P uniformly spaced subbands (1) based on pilot symbols received on a second set of subbands used for pilot transmission and (2) using extrapolation and/or interpolation, where P is a power of two. A channel impulse response estimate is obtained by performing a P-point IFFT on the initial frequency response estimate. A final frequency response estimate for N total subbands is derived by (1) setting low quality taps for the channel impulse response estimate to zero, (2) zero-padding the channel impulse response estimate to length N, and (3) performing an N-point FFT on the zero-padded channel impulse response estimate. The channel frequency/impulse response estimate may be filtered to obtain a higher quality channel estimate.

    摘要翻译： 对于频谱形状的无线通信系统中的信道估计，基于在用于导频传输的第二组子带上接收的导频符号，获得对于第一组P均匀间隔子带（1）的初始频率响应估计，以及（2）使用 外插和/或插值，其中P是2的幂。 通过对初始频率响应估计执行P点IFFT来获得信道脉冲响应估计。 通过（1）将信道脉冲响应估计的低质量抽头设置为零，（2）将信道脉冲响应估计零填充到长度N，得到N个总子带的最终频率响应估计，以及（3）执行N 点零点填充信道脉冲响应估计。 可以对信道频率/脉冲响应估计进行滤波以获得更高质量的信道估计。

    Varied transmission time intervals for wireless communication system
    4.
    发明申请
    Varied transmission time intervals for wireless communication system 有权
    无线通信系统的传输时间间隔

    公开(公告)号：US20070047485A1

    公开(公告)日：2007-03-01

    申请号：US11260932

    申请日：2005-10-27

    申请人： Alexei Gorokhov ,  Edward Teague ,  Aamod Khandekar

    发明人： Alexei Gorokhov ,  Edward Teague ,  Aamod Khandekar

    IPC分类号： H04Q7/00

    CPC分类号： H04W72/1231

    摘要： Embodiments describe a varied transmission time interval in wireless communication system. According to some embodiments is a method for assigning a transmission time interval. The method can include measuring a channel condition and/or a data rate of packet communicated by at least one wireless device. Based in part on the data rate and/or channel condition information, a determination can be made whether to schedule a long transmission time interval or a short transmission time interval to the packet. A long transmission time interval can be scheduled if the channel condition is poor and/or there is a low data rate. A short transmission time interval can be scheduled if the channel condition is good and/or the data rate is high or fast. The method can be repeated for multiple wireless devices. Also included is an alternative interlacing structure that supports both long transmission time intervals and short transmission time intervals.

    摘要翻译： 实施例描述了无线通信系统中的变化的传输时间间隔。 根据一些实施例是用于分配传输时间间隔的方法。 该方法可以包括测量由至少一个无线设备传送的分组的信道条件和/或数据速率。 部分地基于数据速率和/或信道条件信息，可以确定是否为分组规划长的传输时间间隔或短的传输时间间隔。 如果信道条件差和/或数据速率低，则可以调度长传输时间间隔。 如果信道条件良好和/或数据速率高或快，则可以调度短传输时间间隔。 可以为多个无线设备重复该方法。 还包括支持长传输时间间隔和短传输时间间隔的替代交错结构。

    Shared signaling channel
    9.
    发明申请
    Shared signaling channel 有权
    共享信令通道

    公开(公告)号：US20070097853A1

    公开(公告)日：2007-05-03

    申请号：US11261158

    申请日：2005-10-27

    申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Dhananjay Gore ,  Edward Teague ,  Min Dong

    发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Dhananjay Gore ,  Edward Teague ,  Min Dong

    IPC分类号： H04J11/00 ,  H04B7/216 ,  H04B7/00

    CPC分类号： H04L5/0044 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053

    摘要： A shared signaling channel can be used in an Orthogonal Frequency Division Multiple Access (OFDMA) communication system to provide signaling, acknowledgement, and power control messages to access terminals within the system. The shared signaling channel can be assigned to a predetermined number of sub-carriers within any frame. The assignment of a predetermined number of sub-carriers to the shared signaling channel establishes a fixed bandwidth overhead for the channel. The actual sub-carriers assigned to the channel can be varied periodically, and can vary according to a predetermined frequency hopping schedule. The amount of signal power allocated to the signaling channel can vary on a per symbol basis depending on the power requirements of the communication link. The shared signaling channel can direct each message carried on the channel to one or more access terminals. Unicast messages allow the channel power to be controlled per the needs of individual communication links.

    摘要翻译： 可以在正交频分多址（OFDMA）通信系统中使用共享信令信道，以向系统内的接入终端提供信令，确认和功率控制消息。 共享信令信道可以被分配给任何帧内的预定数量的子载波。 将预定数量的子载波分配给共享信令信道为信道建立固定的带宽开销。 分配给信道的实际子载波可以周期性地变化，并且可以根据预定的跳频调度而变化。 分配给信令信道的信号功率的量可以根据通信链路的功率要求在每个符号的基础上变化。 共享信令信道可以将信道上承载的每个消息引导到一个或多个接入终端。 单播消息允许根据各个通信链路的需要来控制信道功率。