CHANNEL ESTIMATOR
    1.
    发明申请
    CHANNEL ESTIMATOR 审中-公开
    频道估算器

    公开(公告)号:US20110206168A1

    公开(公告)日:2011-08-25

    申请号:US12883636

    申请日:2010-09-16

    IPC分类号: H04B1/10

    CPC分类号: H04B17/345 H04B17/327

    摘要: According to an embodiment, a channel estimator includes a channel response estimation section configured to estimate a channel response by correlation processing between a received signal and a known pattern signal; a path power calculation section configured to measure power of each path within an output of the channel response estimation section; a noise power calculation section configured to measure noise power from the output of the channel response estimation section; a path determination section configured to determine paths to be preserved by using the path power outputted from the path power calculation section and the noise power outputted from the noise power calculation section; and a noise removal section configured to remove values in time domain excepting the paths determined at the path determination section, from the output of the channel response estimation section.

    摘要翻译: 根据实施例,信道估计器包括信道响应估计部分,被配置为通过接收信号和已知模式信号之间的相关处理来估计信道响应; 路径功率计算部,被配置为测量所述信道响应估计部的输出内的各路径的功率; 噪声功率计算部,被配置为从所述信道响应估计部的输出测量噪声功率; 路径决定部,被配置为通过使用从路径功率计算部输出的路径功率和从噪声功率计算部输出的噪声功率来确定要保存的路径; 以及噪声去除部,被配置为从所述信道响应估计部的输出除去在所述路径判定部所决定的路径以外的时域中的值。

    FREQUENCY ERROR DETECTING CIRCUIT, FREQUENCY ERROR DETECTING METHOD, AND FREQUENCY CORRECTING CIRCUIT
    2.
    发明申请
    FREQUENCY ERROR DETECTING CIRCUIT, FREQUENCY ERROR DETECTING METHOD, AND FREQUENCY CORRECTING CIRCUIT 失效
    频率检测电路,频率检测方法和频率校正电路

    公开(公告)号:US20100207670A1

    公开(公告)日:2010-08-19

    申请号:US12706949

    申请日:2010-02-17

    IPC分类号: H03B28/00

    CPC分类号: H04L27/0014

    摘要: A frequency error detecting circuit includes: an oscillator; a frequency converting unit for a received signal on the basis of the oscillation output and output the received signal; a time-to-frequency converting unit configured to convert the output of the frequency converting unit into a frequency domain signal; a frequency shift determining unit configured to determine presence or absence of a frequency shift between an output frequency of the frequency converting unit and a predetermined carrier frequency; and a control unit configured to repeat frequency conversion processing and time-to-frequency conversion processing while controlling an oscillation frequency of the oscillator on the basis of a determination result of the frequency shift determining unit and cause the output frequency of the frequency converting unit to converge on a predetermined value to thereby detect a frequency error between the frequency of the received signal and the predetermined carrier frequency.

    摘要翻译: 频率误差检测电路包括:振荡器; 基于振荡输出的接收信号的频率转换单元,并输出接收信号; 时频转换单元,被配置为将频率转换单元的输出转换为频域信号; 频率确定单元,被配置为确定频率转换单元的输出频率与预定载波频率之间的频移的存在或不存在; 以及控制单元,其被配置为在基于所述频移确定单元的确定结果控制所述振荡器的振荡频率的同时重复频率转换处理和时间 - 频率转换处理,并且使所述频率转换单元的输出频率 收敛于预定值,从而检测接收信号的频率与预定载波频率之间的频率误差。

    Frequency error detecting circuit, frequency error detecting method, and frequency correcting circuit
    3.
    发明授权
    Frequency error detecting circuit, frequency error detecting method, and frequency correcting circuit 失效
    频率误差检测电路,频率误差检测方法和频率校正电路

    公开(公告)号:US08115521B2

    公开(公告)日:2012-02-14

    申请号:US12706949

    申请日:2010-02-17

    IPC分类号: H04B1/16

    CPC分类号: H04L27/0014

    摘要: A frequency error detecting circuit includes: an oscillator; a frequency converting unit for a received signal on the basis of the oscillation output and output the received signal; a time-to-frequency converting unit configured to convert the output of the frequency converting unit into a frequency domain signal; a frequency shift determining unit configured to determine presence or absence of a frequency shift between an output frequency of the frequency converting unit and a predetermined carrier frequency; and a control unit configured to repeat frequency conversion processing and time-to-frequency conversion processing while controlling an oscillation frequency of the oscillator on the basis of a determination result of the frequency shift determining unit and cause the output frequency of the frequency converting unit to converge on a predetermined value to thereby detect a frequency error between the frequency of the received signal and the predetermined carrier frequency.

    摘要翻译: 频率误差检测电路包括:振荡器; 基于振荡输出的接收信号的频率转换单元,并输出接收信号; 时频转换单元,被配置为将频率转换单元的输出转换为频域信号; 频率确定单元,被配置为确定频率转换单元的输出频率与预定载波频率之间的频移的存在或不存在; 以及控制单元,其被配置为在基于所述频移确定单元的确定结果控制所述振荡器的振荡频率的同时重复频率转换处理和时间 - 频率转换处理,并且使所述频率转换单元的输出频率 收敛于预定值,从而检测接收信号的频率与预定载波频率之间的频率误差。

    CHANNEL ESTIMATOR
    4.
    发明申请
    CHANNEL ESTIMATOR 审中-公开
    频道估计

    公开(公告)号:US20110033012A1

    公开(公告)日:2011-02-10

    申请号:US12834178

    申请日:2010-07-12

    IPC分类号: H04L27/06

    摘要: A channel estimator includes: a delay time estimation section configured to estimate a delay time of a received signal; an FFT parameter determination section configured to determine an FFT window position and an FFT size according to the estimated delay time; a first and a second FFT sections configured to transform the received signal and a known pattern signal, respectively, to the frequency domain based on the FFT window position and the FFT size that are determined; a channel response calculation section configured to perform division processing to divide the output of the first FFT section by the output of the second FFT section; and an IFFT section configured to apply IFFT to the output of the channel response calculation section based on the determined FFT size, and the delay time estimation section estimates a delay time based on the output of the IFFT section.

    摘要翻译: 信道估计器包括:延迟时间估计部分,被配置为估计接收信号的延迟时间; FFT参数确定部分,被配置为根据估计的延迟时间确定FFT窗口位置和FFT大小; 第一和第二FFT部分,被配置为基于所确定的FFT窗口位置和FFT大小将接收信号和已知模式信号分别转换到频域; 信道响应计算部分,被配置为执行除法处理,以将第一FFT部分的输出除以第二FFT部分的输出; 以及IFFT部,被配置为基于所确定的FFT大小将IFFT应用于所述信道响应计算部的输出,并且所述延迟时间估计部基于所述IFFT部的输出来推定延迟时间。

    FRAME NUMBER DETECTING DEVICE
    5.
    发明申请
    FRAME NUMBER DETECTING DEVICE 审中-公开
    框架检测设备

    公开(公告)号:US20100226467A1

    公开(公告)日:2010-09-09

    申请号:US12714751

    申请日:2010-03-01

    IPC分类号: H04L7/02

    摘要: A frame number detecting device includes: a symbol counter that receives a received signal including frames each of which is formed of a predetermined number of symbols, and outputs a count value as a symbol number for each of the symbols by incrementing the count value by one every time one symbol is inputted, each of the frames including a frame synchronization signal including a part obtained by shifting a frame synchronization signal of a different frame on a symbol-by-symbol basis according to a predetermined rule; a sequence storage that stores a synchronization sequence based on at least one of the frame synchronization signals included in the received signal, and a pattern matching unit that performs pattern matching between the synchronization sequence stored in the sequence storage and the received signal.

    摘要翻译: 帧号检测装置包括:符号计数器,其接收包括由预定数量的符号形成的帧的接收信号,并且通过将计数值递增1来输出计数值作为每个符号的符号数 每次输入一个符号时,每个帧包括帧同步信号,该帧同步信号包括根据预定规则逐个符号地移位不同帧的帧同步信号而获得的部分; 基于包含在接收信号中的帧同步信号中的至少一个存储同步序列的序列存储器,以及执行存储在序列存储器中的同步序列与接收信号之间的模式匹配的模式匹配单元。

    Channel estimator
    6.
    发明授权
    Channel estimator 有权
    通道估计器

    公开(公告)号:US08503579B2

    公开(公告)日:2013-08-06

    申请号:US12834189

    申请日:2010-07-12

    IPC分类号: H04B1/10 H04L27/00

    摘要: The channel estimator includes a plurality of correlating sections configured to calculate a plurality of time correlation values between the signal and a plurality of known pattern signals having different code lengths, an analyzing section configured to output a control signal representing a selected period for extracting a preferable correlation output from the output from each of the plurality of correlating sections, and a delay profile generating section configured to output a delay profile obtained by adaptively selecting or combining parts of the outputs from the plurality of correlating sections based on the output from the analyzing section.

    摘要翻译: 信道估计器包括多个相关部分,被配置为计算信号与具有不同码长的多个已知模式信号之间的多个时间相关值,分析部分被配置为输出表示选择的周期的控制信号,以提取优选的 相关输出来自多个相关部分的每一个的输出;以及延迟分布生成部分,被配置为输出通过基于来自分析部分的输出自适应地选择或组合来自多个相关部分的输出的部分而获得的延迟分布 。

    CHANNEL ESTIMATOR
    7.
    发明申请
    CHANNEL ESTIMATOR 有权
    频道估算器

    公开(公告)号:US20110051863A1

    公开(公告)日:2011-03-03

    申请号:US12834189

    申请日:2010-07-12

    IPC分类号: H04B1/10 H04L27/00

    摘要: The channel estimator includes a plurality of correlating sections configured to calculate a plurality of time correlation values between the signal and a plurality of known pattern signals having different code lengths, an analyzing section configured to output a control signal representing a selected period for extracting a preferable correlation output from the output from each of the plurality of correlating sections, and a delay profile generating section configured to output a delay profile obtained by adaptively selecting or combining parts of the outputs from the plurality of correlating sections based on the output from the analyzing section.

    摘要翻译: 信道估计器包括多个相关部分,被配置为计算信号与具有不同码长的多个已知模式信号之间的多个时间相关值,分析部分被配置为输出表示选择的周期的控制信号,以提取优选的 相关输出来自多个相关部分的每一个的输出;以及延迟分布生成部分,被配置为输出通过基于来自分析部分的输出自适应地选择或组合来自多个相关部分的输出的部分而获得的延迟分布 。

    OFDM demodulation apparatus, method and computer readable medium
    8.
    发明授权
    OFDM demodulation apparatus, method and computer readable medium 失效
    OFDM解调装置,方法和计算机可读介质

    公开(公告)号:US07551548B2

    公开(公告)日:2009-06-23

    申请号:US11387966

    申请日:2006-03-24

    IPC分类号: H04J11/00

    CPC分类号: H04L27/2647

    摘要: Orthogonal frequency division multiplexing demodulation apparatus includes: antenna to receive signal including holding period including part of period ranging from leading portion of delayed wave of maximum-delay time to trailing portion of preceding wave, unit estimating channel response of signal received by antenna, unit holding, based on channel response, first-signal component contained in holding period, first-signal component including second-signal component which is contained in period of preset length which is included in holding period, unit acquiring filter-bank outputs by subjecting second-signal component to frequency conversion, unit generating replicas for each of filter-bank outputs, based on estimated-channel response, frequency response of each of filter-bank outputs, and candidates for modulation signal corresponding to subcarrier included in each of filter-bank outputs, unit selecting one of replicas which minimizes quantity corresponding to differences between components of each of filter-bank outputs and components of replicas, and unit determining modulation signal based on selected replica.

    摘要翻译: 正交频分复用解调装置包括:天线接收信号,包括保持周期,包括从最大延迟时间的延迟波的前导部分到前一个波形的尾部的时间段的一部分,单元估计由天线接收的信号的信道响应,单元保持 基于信道响应,包含在保持周期中的第一信号分量包括包含在保持周期中的预设长度的周期中的第二信号分量的第一信号分量通过对第二信号进行二次信号的单元获取滤波器组输出 基于估计的信道响应,每个滤波器组输出的频率响应以及与每个滤波器组输出中包括的子载波相对应的调制信号的候选,对于每个滤波器组输出的单元生成副本, 选择最小化对应于co之间的差异的数量的复制品之一的单元 滤波器组输出和副本组件中的每一个的组成部分,以及基于选择的副本的单元确定调制信号。

    OFDM demodulation apparatus, method and computer readable medium

    公开(公告)号:US20060285482A1

    公开(公告)日:2006-12-21

    申请号:US11387966

    申请日:2006-03-24

    IPC分类号: H04J11/00

    CPC分类号: H04L27/2647

    摘要: Orthogonal frequency division multiplexing demodulation apparatus includes: antenna to receive signal including holding period including part of period ranging from leading portion of delayed wave of maximum-delay time to trailing portion of preceding wave, unit estimating channel response of signal received by antenna, unit holding, based on channel response, first-signal component contained in holding period, first-signal component including second-signal component which is contained in period of preset length which is included in holding period, unit acquiring filter-bank outputs by subjecting second-signal component to frequency conversion, unit generating replicas for each of filter-bank outputs, based on estimated-channel response, frequency response of each of filter-bank outputs, and candidates for modulation signal corresponding to subcarrier included in each of filter-bank outputs, unit selecting one of replicas which minimizes quantity corresponding to differences between components of each of filter-bank outputs and components of replicas, and unit determining modulation signal based on selected replica.

    Radio communication system
    10.
    发明授权
    Radio communication system 失效
    无线通信系统

    公开(公告)号:US07496384B2

    公开(公告)日:2009-02-24

    申请号:US11288171

    申请日:2005-11-29

    IPC分类号: H04M1/00

    摘要: There is disclosed a radio communication system in which a constitution of a base station and further a control station can be simplified. A radio communication system according to the present invention converts a received signal received by a plurality of antenna elements in a base station to a signal of different frequency band, and then conflates the converted signal in order to generate sub-carrier wave multiplex signal. The signal is converted to an optical signal, and then the optical signal is transmitted to a control station via an optical fiber. Or the control station performs weighting to phase of the transmitted signal transmitted from a plurality of antennas of a base station, and then performs frequency conversion to different frequency band, and then conflates the converted signal in order to generate the sub-carrier wave multiplex signal. The signal is converted to an optical signal, and then an optical signal is transmitted to the base station side via the optical fiber. The control station and the base station divides the received sub-carrier wave multiplex signal by each frequency band, and then the frequency of the divided signals are converted to the same frequency band in order to generate the transmitted/received signal of each antenna element. By such a constitution, it is possible to reduce constituent of the optical transmission components to the minimum and to simplify the constitution of the base station. Furthermore, it is possible to maintain the relative phase difference and the relative intensity of the transmitted/received signal of each antenna element. Because of this, it is possible to estimate an arrival direction of the received signal and to control radiation beam pattern of the transmitted signal.

    摘要翻译: 公开了一种无线电通信系统,其中可以简化基站的结构和控制站的结构。 根据本发明的无线电通信系统将由基站中的多个天线元件接收的接收信号转换为不同频带的信号,然后混合转换的信号以产生副载波复用信号。 信号被转换为光信号,然后光信号通过光纤传输到控制站。 或者控制站对从基站的多个天线发送的发送信号的相位进行加权,然后对不同的频带进行频率转换,然后混合转换的信号,以产生副载波复用信号 。 信号被转换为光信号,然后经由光纤将光信号发送到基站侧。 控制站和基站将接收到的副载波复用信号除以每个频带,然后将分频信号的频率转换为相同的频带,以便产生每个天线单元的发送/接收信号。 通过这样的结构,能够将光传输部件的成分最小化,并且简化基站的结构。 此外,可以保持每个天线元件的发送/接收信号的相对相位差和相对强度。 因此,可以估计接收信号的到达方向并控制发送信号的辐射束图案。