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    • 9. 发明申请
    • DIVERSITY RECEIVER AND METHOD
    • 多样性接收者和方法
    • US20070116161A1
    • 2007-05-24
    • US11562657
    • 2006-11-22
    • Kenichi TokoroTakashi Seki
    • Kenichi TokoroTakashi Seki
    • H04L1/02
    • H04L1/0057H04B7/0854H04L1/0052H04L1/06H04L27/2647
    • Respective demodulated outputs from a plurality of branches 11a to 11d are fed to corresponding error correction units 13a to 13d and error-corrected. The error correction units 13a to 13d feed error signals to error determination units 14a to 14d. The error determination units 14a to 14d determine the error-incidence situations of the respective branches 11a to 11d and then output the determination results to a coefficient generation unit 15. Based on the results of determination by the error determination units 14a to 14d, the coefficient generation unit 15 obtains the synthesis coefficients for the respective branch outputs. The synthesis coefficients correspond to the error-incidence situations of the respective branch outputs and are appropriate values including no errors. By synthesizing the respective branch outputs by use of the synthesis coefficients, error-free data can be reproduced.
    • 来自多个分支11a至11d的相应解调输出被馈送到相应的纠错单元13a至13d并进行纠错。 误差校正单元13a至13d将误差信号馈送到错误确定单元14a至14d。 错误确定单元14a至14d确定各个分支11a至11d的错误发生情况,然后将确定结果输出到系数生成单元15.基于错误确定单元14a的确定结果 到14天,系数生成单元15获得各分支输出的合成系数。 合成系数对应于各个分支输出的误差发生情况,并且是不包括错误的适当值。 通过使用合成系数合成各个分支输出,可以再现无错误的数据。
    • 10. 发明授权
    • OFDM transmit signal receiver
    • US06983027B2
    • 2006-01-03
    • US09987881
    • 2001-11-16
    • Takashi SekiTakeshi Koyama
    • Takashi SekiTakeshi Koyama
    • H03K9/00
    • H04L27/2647H04L1/20
    • A demodulation circuit receives an OFDM transmit signal containing an information carrier, an additive-information transmission carrier, and a reception-synchronization pilot signal to convert these carriers and signal into frequency-axial data. The information carrier transmits information data. The additive-information transmission carrier and the reception-synchronization pilot signal have a lower multi-valued modulation degree than the information carrier. A differential detection circuit conducts detection processing by using a detection-subject symbol of a plurality of symbols indicated at a predetermined interval in the same frequency range and a symbol ahead that detection-subject symbol by a predetermined time in either one output of the additive-information transmission carrier and the reception-synchronization pilot signal output from the demodulation circuit. A first S/N ratio generating circuit generates an S/N ratio based on a detection output provided from the differential detection circuit. The S/N ratio indicates the reception quality of the OFDM transmit signal.