会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • OFDM reception device, OFDM reception circuit, OFDM reception method, and OFDM reception program
    • OFDM接收装置,OFDM接收电路,OFDM接收方法和OFDM接收程序
    • US09065713B2
    • 2015-06-23
    • US13519203
    • 2011-10-03
    • Yoshinobu Matsumura
    • Yoshinobu Matsumura
    • H04L27/06H04L27/26
    • H04L27/2607H04L27/2613H04L27/2657H04L27/2675
    • An OFDM reception device including: a first orthogonal transformation unit that orthogonally transforms a signal for a useful symbol duration included in an OFDM signal and outputs a resulting orthogonally transformed signal; a second orthogonal transformation unit that orthogonally transforms a signal for a guard interval duration included in the OFDM signal and outputs a resulting orthogonally transformed signal; a detection unit that detects a wide band carrier frequency error amount according to the signal output from the first orthogonal transformation unit and the signal output from the second orthogonal transformation unit; and a correction unit that corrects a wide band carrier frequency shift of the OFDM symbol according to the wide band carrier frequency error amount detected by the detection unit.
    • 一种OFDM接收装置,包括:第一正交变换单元,对包含在OFDM信号中的有用符号持续时间的信号进行正交变换,并输出得到的正交变换信号; 第二正交变换单元,对包含在OFDM信号中的保护间隔持续时间的信号进行正交变换,并输出得到的正交变换信号; 检测单元,根据从第一正交变换单元输出的信号和从第二正交变换单元输出的信号,检测宽带载波频率误差量; 以及校正单元,其根据由检测单元检测到的宽带载波频率误差量校正OFDM符号的宽带载波频移。
    • 3. 发明申请
    • RECEIVER, INTEGRATED CIRCUIT, RECEIVING METHOD, AND PROGRAM
    • 接收机,集成电路,接收方法和程序
    • US20130114659A1
    • 2013-05-09
    • US13809921
    • 2012-05-17
    • Mariko MurakamiYoshinobu Matsumura
    • Mariko MurakamiYoshinobu Matsumura
    • H04L12/26
    • H04L43/0823H04J11/0036H04L1/0047H04L5/005H04L25/022H04L25/0232H04L27/2662H04L27/2691H04L2025/03414H04N17/004
    • A receiver includes a demodulator that demodulates a modulation wave modulated according to orthogonal frequency division multiplexing (OFDM). The demodulator includes an interference wave detector that detects that received modulation wave includes interference wave when received power of each sample of the received modulation wave exceeds a threshold, and upon the detection, executes replacement processing of replacing a received signal exceeding the threshold with a predetermined value, a first interference wave power estimation unit configured to estimate interference wave power included in an OFDM symbol included in the received modulation wave on the basis of the number of samples that have been subjected to the replacement processing, and a demodulated data generator that demodulates the received modulation wave by executing demodulation processing of demodulating the received modulation wave that has been subjected to the replacement processing on the basis of the interference wave power.
    • 接收机包括解调器,其解调根据正交频分复用(OFDM)调制的调制波。 解调器包括干扰波检测器,当所接收的调制波的每个采样的接收功率超过阈值时,检测接收到的调制波包括干扰波,并且在检测时,执行以超过阈值替换超过阈值的接收信号的替换处理 第一干涉波功率估计单元,被配置为基于已经经过替换处理的采样数来估计包含在接收的调制波中的OFDM符号中的干扰波功率;以及解调数据发生器, 通过执行基于干扰波功率解调接收到的经过替换处理的调制波的解调处理来接收调制波。
    • 4. 发明授权
    • Receiver, integrated circuit, receiving method, and program
    • 接收器,集成电路,接收方式和程序
    • US08731037B2
    • 2014-05-20
    • US13809921
    • 2012-05-17
    • Mariko MurakamiYoshinobu Matsumura
    • Mariko MurakamiYoshinobu Matsumura
    • H04B3/46H04B17/00
    • H04L43/0823H04J11/0036H04L1/0047H04L5/005H04L25/022H04L25/0232H04L27/2662H04L27/2691H04L2025/03414H04N17/004
    • A receiver includes a demodulator that demodulates a modulation wave modulated according to orthogonal frequency division multiplexing (OFDM). The demodulator includes an interference wave detector that detects that received modulation wave includes interference wave when received power of each sample of the received modulation wave exceeds a threshold, and upon the detection, executes replacement processing of replacing a received signal exceeding the threshold with a predetermined value, a first interference wave power estimation unit configured to estimate interference wave power included in an OFDM symbol included in the received modulation wave on the basis of the number of samples that have been subjected to the replacement processing, and a demodulated data generator that demodulates the received modulation wave by executing demodulation processing of demodulating the received modulation wave that has been subjected to the replacement processing on the basis of the interference wave power.
    • 接收机包括解调器,其解调根据正交频分复用(OFDM)调制的调制波。 解调器包括干扰波检测器,当所接收的调制波的每个采样的接收功率超过阈值时,检测接收到的调制波包括干扰波,并且在检测时,执行以超过阈值替换超过阈值的接收信号的替换处理 第一干涉波功率估计单元,被配置为基于已经经过替换处理的采样数来估计包含在接收的调制波中的OFDM符号中的干扰波功率;以及解调数据发生器, 通过执行基于干扰波功率解调接收到的经过替换处理的调制波的解调处理来接收调制波。
    • 6. 发明申请
    • OFDM RECEPTION DEVICE, OFDM RECEPTION CIRCUIT, OFDM RECEPTION METHOD, AND OFDM RECEPTION PROGRAM
    • OFDM接收设备,OFDM接收电路,OFDM接收方法和OFDM接收程序
    • US20120207250A1
    • 2012-08-16
    • US13503749
    • 2011-09-15
    • Yoshinobu Matsumura
    • Yoshinobu Matsumura
    • H04L27/28
    • H04L27/2607H04L27/265
    • An OFDM reception device receives an OFDM symbol that includes a signal for a useful symbol duration generated based on transmission information and a signal for a guard interval duration generated based on the signal for the useful symbol duration. The OFDM reception device includes a first orthogonal transformation unit configured to perform an orthogonal transformation on the signal for the useful symbol duration, a second orthogonal transformation unit configured to perform an orthogonal transformation on the signal for the guard interval duration, and a decoding unit configured to decode the OFDM symbol in accordance with results of the orthogonal transformation by the first orthogonal transformation unit and results of the orthogonal transformation by the second orthogonal transformation unit.
    • OFDM接收设备接收包括用于基于传输信息生成的有用符号持续时间的信号的OFDM符号,以及基于有用符号持续时间的信号产生的用于保护间隔持续时间的信号。 OFDM接收装置包括:第一正交变换单元,被配置为对有用符号持续时间的信号执行正交变换;第二正交变换单元,被配置为对保护间隔持续时间的信号执行正交变换;以及解码单元, 根据第一正交变换单元的正交变换结果和第二正交变换单位的正交变换结果对OFDM符号进行解码。
    • 10. 发明授权
    • Inter-carrier interference removal device and reception device using the same
    • 载波间干扰去除装置及使用其的接收装置
    • US07991089B2
    • 2011-08-02
    • US12090735
    • 2006-10-20
    • Hideki NakaharaYoshinobu MatsumuraMikihiro OuchiTomohiko Taniguchi
    • Hideki NakaharaYoshinobu MatsumuraMikihiro OuchiTomohiko Taniguchi
    • H04B7/10
    • H04L25/03159H04L25/022H04L25/0222H04L25/0232H04L25/03821H04L27/2649H04L2025/03414
    • An inter-carrier interface removal device can improve estimation accuracy of inter-carrier interference caused by Doppler shift in a received multi-carrier signal moving at a high speed, and a reception characteristic of the multi-carrier signal after removing the inter-carrier interference. The inter-carrier interference removal device includes a channel estimation unit estimating a channel frequency characteristic according to a carrier signal, an equalization unit equalizing the carrier signal with the channel frequency characteristic and outputs tentative carrier data, a reliability value calculation unit calculating a reliability value according to the channel frequency characteristic, a weighting unit weighting the tentative carrier data with the reliability value, an ICI component estimation unit estimating an ICI component according to the weighted tentative carrier data and the estimated channel frequency characteristic, and an ICI removal calculation unit removing the ICI component from the carrier signal.
    • 载波间接口去除装置可以提高在高速移动的接收多载波信号中由多普勒频移引起的载波间干扰的估计精度,以及去除载波间干扰后的多载波信号的接收特性 。 载波间干扰去除装置包括:信道估计单元,根据载波信号估计信道频率特性;均衡单元,使载波信号与信道频率特性相等,并输出暂定载波数据;可靠性值计算单元,计算可靠性值 根据信道频率特性,对具有可靠性值的暂定载波数据加权的加权单元,ICI分量估计单元,根据加权的假载波数据和估计的信道频率特性来估计ICI分量,以及ICI去除计算单元去除 ICI组件从载波信号。