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    • 4. 发明授权
    • Reducing a peak-to-average ratio of a signal using filtering
    • 使用滤波降低信号的峰均比
    • US08098744B2
    • 2012-01-17
    • US11649076
    • 2007-01-03
    • Ning ChenJeffrey KeatingJames W. McCoy
    • Ning ChenJeffrey KeatingJames W. McCoy
    • H04K1/10
    • H04L27/2614
    • Methods and corresponding systems for reducing a peak-to-average signal ratio include determining peak and null samples of a symbol. Thereafter, an error signal is calculated that is responsive to the peak and null samples. In one embodiment the error signal has values corresponding to differences between the peak samples and a high threshold and the null samples and a low threshold. In response to the error signal, the samples are filtered to produce a filtered symbol having a reduced peak-to-average signal ratio. The error signal can also be used to calculate reserved tones on reserved subcarriers, which are combined with multi-tone subcarriers in a multi-carrier transmitter.
    • 降低峰均信号比率的方法和相应系统包括确定符号的峰值和空样本。 此后,计算响应于峰值和空样本的误差信号。 在一个实施例中,误差信号具有对应于峰值采样和高阈值与空采样和低阈值之间的差异的值。 响应于误差信号,对样本进行滤波以产生具有降低的峰值与平均信号比的滤波符号。 误差信号还可用于计算在多载波发射机中与多音调副载波组合的保留副载波上的保留音调。
    • 5. 发明申请
    • Channel Sounding Techniques for a Wireless Communication System
    • 无线通信系统的通道探测技术
    • US20110096707A1
    • 2011-04-28
    • US12981423
    • 2010-12-29
    • James W. McCoyNing Chen
    • James W. McCoyNing Chen
    • H04W52/00
    • 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。
    • 9. 发明申请
    • SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS RECEIVER FOR MIMO SYSTEMS
    • MIMO系统的单载波频分多址接入接收机
    • US20080192854A1
    • 2008-08-14
    • US11673163
    • 2007-02-09
    • Taeyoon KimJames W. McCoyOghenekome F. Oteri
    • Taeyoon KimJames W. McCoyOghenekome F. Oteri
    • H04B7/02
    • H04L25/03006H04B7/0854H04L5/0007H04L2025/03426
    • A method for processing symbols transmitted via a first plurality of antennas and received via a second plurality of antennas is provided. The method includes receiving symbol streams corresponding to a sub-carrier frequency from each of the second plurality of antennas. The method further includes generating estimated symbol streams for the sub-carrier frequency for each of the first plurality of antennas. The method further includes selecting an estimated symbol stream corresponding to one of the first plurality of antennas for interference cancellation. The method further includes transforming the selected symbol stream into time domain and decoding the selected symbol stream. The method further includes transforming the decoded symbol stream into frequency domain. The method further includes performing interference cancellation using the decoded symbol stream.
    • 提供一种用于处理经由第一多个天线发送并经由第二多个天线接收的符号的方法。 该方法包括从第二多个天线中的每一个接收与子载波频率对应的符号流。 该方法还包括为第一多个天线中的每个天线产生用于副载波频率的估计符号流。 该方法还包括选择与第一多个天线之一相对应的估计符号流,用于干扰消除。 该方法还包括将所选择的符号流变换为时域并解码所选择的符号流。 该方法还包括将解码的符号流变换为频域。 该方法还包括使用解码符号流来执行干扰消除。