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188 条记录 (耗时 0.045 秒)

    Delay lock loops for wireless communication systems
    22.
    发明授权
    Delay lock loops for wireless communication systems 有权
    用于无线通信系统的延迟锁定环路

    公开(公告)号：US07817760B2

    公开(公告)日：2010-10-19

    申请号：US11368115

    申请日：2006-03-03

    申请人： Peter J. Black ,  Nagabhushana T. Sindhushayana

    发明人： Peter J. Black ,  Nagabhushana T. Sindhushayana

    IPC分类号： H04L7/00

    CPC分类号： H04B7/082 ,  H03L7/089 ,  H03L7/091 ,  H03L7/093

    摘要： Techniques for deriving sample timing for multiple signal instances received on multiple antennas for a given propagation path. In one scheme, a DLL is maintained for each path, and each DLL tracks the timing of the best signal instance for the assigned path. In another scheme, a DLL is maintained for each path, and each DLL tracks the average timing of the multiple signal instances for the assigned path. To reduce timing jitter, the SINR of a signal instance may be estimated for a number of different time offsets. The loop filter for the DLL is initially updated in the normal manner. If a change in the time offset used for the sample timing is detected, then the SINRs for the new and prior offsets are compared. The new time offset is used if the associated SINR is better. Otherwise, the prior time offset is retained and used.

    摘要翻译： 用于为给定传播路径导出在多个天线上接收的多个信号实例的采样定时的技术。 在一种方案中，为每个路径维护一个DLL，并且每个DLL跟踪分配的路径的最佳信号实例的定时。 在另一种方案中，为每个路径维护DLL，并且每个DLL跟踪所分配的路径的多个信号实例的平均定时。 为了减少定时抖动，信号实例的SINR可以针对多个不同的时间偏移来估计。 DLL的循环过滤器最初以正常方式更新。 如果检测到用于采样定时的时间偏移的变化，则比较新和偏移量的SINR。 如果相关联的SINR更好，则使用新的时间偏移。 否则，保留和使用先前的时间偏移量。

    Method and apparatus for reducing power consumption of a decoder in a communication system
    28.
    发明授权
    Method and apparatus for reducing power consumption of a decoder in a communication system 有权
    用于降低通信系统中解码器功耗的方法和装置

    公开(公告)号：US07051268B1

    公开(公告)日：2006-05-23

    申请号：US09675704

    申请日：2000-09-29

    申请人： Nagabhushana T. Sindhushayana ,  Peter J. Black

    发明人： Nagabhushana T. Sindhushayana ,  Peter J. Black

    IPC分类号： H03M13/00 ,  H03M13/03

    CPC分类号： H04L1/0045 ,  H04L1/0051 ,  H04W52/0245 ,  Y02D70/21

    摘要： A method and an apparatus for reducing power consumption of a decoder in a communication system are disclosed. In a communication system communicating a packet, the packet can be arranged among slots of a communication channel so that each slot following the first slot contains redundant bits of the packet with respect to the first slot. A receiving station estimates quality metric of a received slot, determines a quality metric threshold, and delimits an interval in accordance with the modified quality metric threshold. If the estimated quality metric is outside of the interval, the segment is decoded. The decoding process comprises delimiting a plurality of intervals in accordance with the quality metric threshold, associating each of the plurality of intervals with one of a plurality of parameters, determining an interval from the plurality of intervals into which the estimated quality metric belongs; and decoding the received signal for a number of iterations equal to the one of a plurality of parameters associated with the determined interval. In the course of the decoding process, a stopping criterion is evaluated, and the decoding process is terminated in accordance with the stopping criterion.

    摘要翻译： 公开了一种用于降低通信系统中解码器功耗的方法和装置。 在传送分组的通信系统中，分组可以布置在通信信道的时隙中，使得跟随第一时隙的每个时隙包含相对于第一时隙的分组的冗余比特。 接收站估计接收时隙的质量度量，确定质量度量阈值，并根据修改的质量度量阈值界定间隔。 如果估计的质量度量在该间隔之外，则该段被解码。 解码过程包括根据质量度量阈值划分多个间隔，将多个间隔中的每一个与多个参数中的一个相关联，从估计质量度量所属的多个间隔中确定间隔; 以及将所接收的信号解码为等于与所确定的间隔相关联的多个参数之一的迭代次数。 在解码处理的过程中，评估停止标准，并根据停止标准终止解码处理。

    Method and apparatus for transmitting and receiving variable rate data
    29.
    发明授权
    Method and apparatus for transmitting and receiving variable rate data 有权
    用于发送和接收可变速率数据的方法和装置

    公开(公告)号：US06798736B1

    公开(公告)日：2004-09-28

    申请号：US09158254

    申请日：1998-09-22

    申请人： Peter J. Black ,  Gadi Karmi ,  Nagabhushana T. Sindhushayana

    发明人： Peter J. Black ,  Gadi Karmi ,  Nagabhushana T. Sindhushayana

    IPC分类号： H04J1100

    CPC分类号： H04L1/0038 ,  H04B1/707 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04J13/00 ,  H04J13/0048 ,  H04J13/10 ,  H04L1/0003 ,  H04L1/0025 ,  H04L1/08

    摘要： A variable rate transmission system transmits a variable rate data packet including an accompanying rate indication signal indicative of the transmission rate of the variable data packet. The data packet can be spread using a long pseudonoise (PN) code, the mask of which can be selected in accordance with the transmission rate of the variable rate data packet. A preamble, providing the transmission rate, can be punctured into an outgoing pilot signal. The rate indication signal can be encoded in accordance with a set of orthogonal functions that are part of the indication of the transmission rate of the data packet.

    摘要翻译： 可变速率传输系统发送包括指示可变数据分组的传输速率的伴随速率指示信号的可变速率数据分组。 可以使用长的伪噪声（PN）码扩展数据分组，其可以根据可变速率数据分组的传输速率来选择其掩码。 提供传输速率的前导码可以被打孔到输出导频信号中。 速率指示信号可以根据作为数据分组的传输速率的指示的一部分的一组正交函数进行编码。