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    • 36. 发明授权
    • Fast predictive automatic gain control for dynamic range reduction in wireless communication receiver
    • 用于无线通信接收机动态范围缩减的快速预测自动增益控制
    • US08077816B2
    • 2011-12-13
    • US11849551
    • 2007-09-04
    • Ian C. WongLeo G. DehnerJames W. McCoy
    • Ian C. WongLeo G. DehnerJames W. McCoy
    • H04L27/08
    • H03G3/3068H03G3/001H04L25/0212
    • A method of fast predictive automatic gain control is disclosed including estimating channel gain applied to a received signal, predicting channel gain at a subsequent time by applying temporal correlation statistics to the estimated channel gain, determining a predicted receiver gain which reduces variance between the predicted channel gain and a predetermined target power level, and applying the predicted receiver gain to the received signal. The method may include applying linear minimum mean-squared error prediction to the estimated channel gain. The method may include predicting error variance at the subsequent time by applying the temporal correlation statistics to the estimated channel gain and combining the predicted channel gain and the predicted error variance. The method may include estimating channel gain of known pilot symbols, estimating a temporal correlation function using the estimated channel gain, and determining predicted channel gain using the estimated channel gain and the estimated temporal correlation function.
    • 公开了一种快速预测自动增益控制的方法,包括估计应用于接收信号的信道增益,通过对估计的信道增益应用时间相关统计来预测随后时间的信道增益,确定预测的接收机增益,其减小预测信道 增益和预定的目标功率电平,以及将预测的接收机增益应用于所接收的信号。 该方法可以包括对估计的信道增益应用线性最小均方误差预测。 该方法可以包括通过对估计的信道增益应用时间相关统计量并组合预测的信道增益和预测误差方差来预测随后时间的误差方差。 该方法可以包括估计已知导频符号的信道增益,使用估计的信道增益估计时间相关函数,以及使用估计的信道增益和估计的时间相关函数来确定预测信道增益。
    • 37. 发明申请
    • PILOT SIGNAL IN AN FDMA COMMUNICATION SYSTEM
    • FDMA通信系统中的引导信号
    • US20110299384A1
    • 2011-12-08
    • US13210251
    • 2011-08-15
    • James W. McCoy
    • James W. McCoy
    • H04J11/00
    • H04J1/12H04L5/0048H04L25/0224H04L27/2613H04L27/2672
    • Methods (500, 800) and corresponding systems (100, 200, 300, 400, 900) for generating a pilot symbol (330) include providing an M-point parallel transform sequence that is a discrete Fourier transform of a CAZAC sequence (312, 504-508). The M-point parallel transform sequence (312) is distributed (316, 510) to a set of M subcarriers among N subcarriers to form an N-point frequency-domain sequence (318) wherein the M subcarriers are evenly spaced apart. An N-point inverse fast Fourier transform (320, 512) is performed to convert the N-point frequency-domain sequence to an N-point time-domain sequence (322). The N-point time-domain sequence is converted (324, 514) to a serial sequence (326), and a cyclic prefix is added (328, 516) to the serial sequence to form a pilot symbol (330).
    • 用于产生导频符号(330)的方法(500,800)和对应系统(100,200,300,400,900)包括提供M点并行变换序列,其是CAZAC序列(312, 504-508)。 M点并行变换序列(312)在N个子载波中分配(316,510)到一组M个子载波,以形成N个频域序列(318),其中M个子载波被均匀间隔开。 执行N点快速傅里叶逆变换(320,512)以将N点频域序列转换为N点时域序列(322)。 将N点时域序列转换(324,514)到串行序列(326),并向循环序列添加循环前缀(328,516)以形成导频符号(330)。
    • 38. 发明授权
    • Resource allocation in multi data stream communication link
    • 多数据流通信链路资源分配
    • US07911934B2
    • 2011-03-22
    • US11541710
    • 2006-10-02
    • Ian C. WongOghenekome F. OteriJames W. McCoy
    • Ian C. WongOghenekome F. OteriJames W. McCoy
    • H04J11/00
    • H04L5/023H04L27/2608
    • Methods and corresponding systems for allocating resources in a communications system includes determining feasible sets of subchannels for allocation to a user subject to an allocation constraint. In one approach, a constraint matrix representing constraints for allocating subchannels to users in allocations of selected subchannels is computed, subject to the allocation constraint. Then a vector containing metrics corresponding to allocations of selected subchannels to the communication links is estimated. A binary decision vector representing an allocation of the subchannels to the users is computed using binary integer processing. In another approach a greedy heuristic allocation is used. The allocation constraint can be a restriction limiting multiple subchannels allocated to a user to be adjacent to one another. The metrics can be weighted capacities of allocations of selected subchannels to the users.
    • 用于在通信系统中分配资源的方法和相应系统包括:确定可用的子信道集合,以分配给受制于分配约束的用户。 在一种方法中,在分配限制的情况下,计算表示用于在分配选定子信道中向用户分配子信道的约束的约束矩阵。 然后估计包含对应于通信链路的所选子信道分配的度量的向量。 使用二进制整数处理来计算表示子信道对用户的分配的二进制判决向量。 在另一种方法中,使用了贪心启发式分配。 分配约束可以是限制分配给用户彼此相邻的多个子信道的限制。 度量可以是用户选择的子信道的分配的加权容量。
    • 39. 发明授权
    • Channel sounding techniques for a wireless communication system
    • 无线通信系统的通道探测技术
    • US07881721B2
    • 2011-02-01
    • US11742291
    • 2007-04-30
    • James W. McCoyNing Chen
    • James W. McCoyNing Chen
    • H04Q7/20
    • H04W52/08H04B17/27H04B17/336H04W24/10H04W52/367
    • A technique of operating a wireless communication system includes determining respective geometries of multiple subscriber stations, which include a first subscriber station and a second subscriber station, with respect to a serving base station. Respective channel sounding bandwidths for sounding the channel between the multiple subscriber stations and the serving base station are then scheduled, based on the respective geometries. The respective channel sounding bandwidths include a first channel sounding bandwidth (associated with the first subscriber station) and a second channel sounding bandwidth (associated with the second subscriber station). The first channel sounding bandwidth is greater than or equal to the second channel sounding bandwidth and the first subscriber station has a lower geometry than the second subscriber station.
    • 操作无线通信系统的技术包括相对于服务基站确定包括第一用户站和第二用户站的多个用户站的相应几何。 然后,基于各自的几何结构来调度用于对多个用户站和服务基站之间的信道进行探测的相应信道探测带宽。 相应的信道探测带宽包括第一信道探测带宽(与第一用户站相关联)和第二信道探测带宽(与第二用户站相关联)。 第一声​​道探测带宽大于或等于第二声道探测带宽,并且第一用户台具有比第二用户台更低的几何形状。