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    • 5. 发明申请
    • BEAM COMBINING AND HYBRID BEAM SELECTION METHOD FOR IMPROVING DIGITAL BROADCASTING RECEPTION PERFORMANCE, AND DIGITAL BROADCASTING RECEIVING APPARATUS USING THE SAME
    • 用于改善数字广播接收性能的光束组合和混合光束选择方法以及使用该数字广播接收装置的数字广播接收装置
    • WO2006065011A1
    • 2006-06-22
    • PCT/KR2005/002117
    • 2005-07-04
    • ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEKIM, Ju-YeunKIM, Young-SuBAE, Jae-HwuiLEE, HyunLIM, Jong-SooLEE, Soo-In
    • KIM, Ju-YeunKIM, Young-SuBAE, Jae-HwuiLEE, HyunLIM, Jong-SooLEE, Soo-In
    • H04N7/015
    • H01Q25/00H04B7/088H04N5/211H04N5/4401H04N21/42638
    • Provided are a beam combining and hybrid beam selection method that can improve digital broadcasting reception performance by combining more than two beam output signals (beam combination type) instead of simply selecting one of beam output signals (beam selection type), or even selecting an optimal method between the beam selection type and the beam combination type, and a digital broadcasting receiving apparatus using the same. The beam selecting method includes: a) calculating SMNRs (mainpath signal to multipath signal and noise ratios) with respect to a plurality of beam output signals, formed according to directions from a plurality of antenna output signals whose phases are shifted depending on arrangement positions of array antennas, by using corresponding channel impulse responses; b) selecting a first predetermined number of beam output signals according to magnitudes of the SMNRs by comparing the calculated SMNRs with respect to the respective beam output signals; c) calculating a delay time between mainpath signals of the selected beam output signals, and generating a combined beam output signal by combining the two beam output signals by adjusting the calculated delay time; d) when the SMNR of the combined beam output signal is less than the maximal SMNR of the selected beam output signals, calculating an SDMR (mainpath signal to dominant multipath signal ratio) with respect to the respective beam output signals, and selecting a beam output signal having the greatest SDMR; and e) calculating an SMNR of the combined beam output signal using channel impulse response of the combined beam output signal, and comparing the calculated SMNR with a maximal value among the SMNRs of the selected beam output signals; and f) when the SMNR of the combined beam output signal is greater than or equal to the maximal SMNR of the selected output signals, selecting the combined beam output signal generated in step c).
    • 提供了一种通过组合两个以上的光束输出信号(光束组合型)而不是简单地选择光束输出信号(光束选择型)中的一种,或者甚至选择最优的光束组合和混合光束选择方法来提高数字广播接收性能 波束选择类型和波束组合类型之间的方法以及使用它们的数字广播接收装置。 波束选择方法包括:a)相对于多个波束输出信号计算SMNR(主路径信号与多径信号和噪声比),根据多个天线输出信号的方向形成,所述多个天线输出信号的相位根据 阵列天线,通过使用相应的信道脉冲响应; b)通过将所计算的SMNR相对于各个波束输出信号进行比较,根据SMNR的幅度来选择第一预定数量的波束输出信号; c)计算所选择的光束输出信号的主路径信号之间的延迟时间,并且通过通过调整所计算的延迟时间来组合两个光束输出信号来产生组合光束输出信号; d)当组合光束输出信号的SMNR小于所选光束输出信号的最大SMNR时,相对于各个光束输出信号计算SDMR(主路径信号与主要多径信号比),并且选择光束输出 SDMR信号最大; 以及e)使用所述组合光束输出信号的信道脉冲响应来计算组合光束输出信号的SMNR,并且将所计算的SMNR与所选光束输出信号的SMNR中的最大值进行比较; 以及f)当组合光束输出信号的SMNR大于或等于所选输出信号的最大SMNR时,选择在步骤c)中产生的组合光束输出信号。