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    • 3. 发明公开
    • Apparatus for stopping adaptive filtering when valid received signal detected
    • 装置,用于如果检测到有效的输入信号来调整自适应滤波器功能
    • EP2061154A1
    • 2009-05-20
    • EP07120789.8
    • 2007-11-15
    • AISIN SEIKI KABUSHIKI KAISHA
    • Yamamoto, TomohiroFuruhashi, AkiraHorie, TakahiroMurukami, YuichiOno, KazunoriCoutant, FredericAouine, Tarik
    • H04B1/12
    • H04B1/123
    • A digital signal receiving apparatus includes a detection-judging portion (19) having a first smoothing filter (19a) generating a first smoothed signal (A1(t)) by smoothing an auto-correlation signal (X(t)) and judging a possible presence of a desired signal when a signal level of the first smoothed signal (A1(t)) is greater than a reference level (A2(t)) and an absence of the desired signal when being smaller than the reference level (A2(t)). The smoothing filter(19a) includes a limiting portion (24) limiting a fluctuation width of the first smoothed signal (A1(t)); and an adjusting portion (21) configure to adjust the fluctuation width of the first smoothed signal (A1(t)) limited by the limiting portion (24) to be reduced while an relapsing time after the detection-judging means (19) judges the possible presence of the desired signal is increasing.
    • 一种数字信号接收装置包括一个具有第一平滑滤波器(19A)由自相关信号的平滑化,生成第一平滑信号(A1(t))的一个检测判断部(19)(X(t))和判断可能 一个希望的信号的存在。当第一平滑信号的信号电平(A1(t))的是比参考电平更大(A2(t))和(在不存在期望的信号。当比基准电平小的(A2吨的 ))。 平滑滤波器(19A)包括限制第一平滑信号(A1(t))的的波动宽度限制部分(24); ((A1 t))和,以调节部(21)配置,以调整由所述限制部(24)限定所述第一平滑信号的波动宽度,同时在复发的检测判断装置后的时间(19)可以减少判断该 所需信号的可能存在日益增加。
    • 4. 发明公开
    • Digital FSK receiver which bypasses adaptive filter if the interference is smaller than the desired signal
    • 数字FSK接收机,如果干扰比有效接收信号较小的绕过的自适应滤波器
    • EP2063540A1
    • 2009-05-27
    • EP07120787.2
    • 2007-11-15
    • AISIN SEIKI KABUSHIKI KAISHAIMRA Europe S.A.S.
    • Yamamoto, TomohiroFuruhashi, AkiraHorie, TakahiroMurakami, YuichiOno, KazunoriCoutant, FredericAouine, Tarik
    • H04B1/12H04L27/14
    • H04B1/123H04L27/14
    • A frequency shift keying digital signal receiving apparatus (10) includes a defecting portion (31) detecting a new signal on the basis of a signal (X), from which a correlated ambient noise is filtered out by an adaptive filter (21), a holding portion (25a) holding a first electric power for the signal (X) received before a new signal is detected, a calculating portion (25b) calculating a second electric power for the signal (X) received after the new signal is detected, a comparing portion (25c) comparing levels of the first and second electric powers, a selector (32) selecting the signal (X), from which the correlated ambient noise is filtered out, when the first electric power is higher than the second electric power and selecting the signal (X) bypassing the adaptive filter (21) when the first electric power is lower than the second electric power, and a demodulating portion (33) demodulating a desired signal on the basis of the signal (X) selected by the selecting portion.
    • 频移键控数字信号接收装置(10)包括:检测信号(X)的基础上,新的信号叛部分(31),从该相关的环境噪声是在自适应滤波器(21),过滤出通过,一个 保持第一电力的信号(X)的保持部(25A)接收的检测到新信号之前,(25B)计算该信号(X)的第二电功率运算部接收到的检测到新信号之后,一个 比较部分(25℃)比较第一和第二电功率的电平,选择器(32)选择信号(X),从该相关的环境噪声被过滤掉,当第一电力小于所述第二电力更高和 选择由选择装置选择的信号(X)绕过所述自适应滤波器(21)当第一电力小于所述第二电力低,以及解调部分(33)的信号(X)的基础上解调期望信号 在的部分。
    • 5. 发明公开
    • Apparatus for stopping adaptive filtering when valid received signal detected and for limiting signal to be demodulated
    • 如果检测装置的自适应滤波器功能的断开的有效输入信号,和用于限制所述信号进行解调
    • EP2061153A1
    • 2009-05-20
    • EP07120783.1
    • 2007-11-15
    • AISIN SEIKI KABUSHIKI KAISHA
    • Yamamoto, TomohiroFuruhashi, AkiraHorie, TakahiroMurukami, YuichiOno, KazunoriCoutant, FredericAouine, Tarik
    • H04B1/12
    • H04B1/123
    • A digital signal receiving apparatus includes: detection-judging portion (19) judging a possible presence of a desired signal when a signal level of a smoothed signal (A1(t)) is greater than a reference level (A2(t)); a filter controlling portion (20) switching an adaptive filter (16) from an adaptive mode to a non-adaptive mode when the detection-judging portion (19) judges the possible presence of the desired signal and switching from the non-adaptive mode to the adaptive mode when the detection judging portion (19) judges the absence of the desired signal; a limiting portion (18a) limiting a signal level of an auto-correlation signal (X(t)) to the signal level of the smoothed signal (A1(t)); and a demodulating portion (18b) demodulating the auto-correlation signal (X(t)) having the signal level limited by the limiting means so as to generate a demodulated signal.
    • 一种数字信号接收装置包括:检测判断部(19)判断所需信号的可能存在当平滑信号的信号电平(A1(t))的是比参考电平更大(A2(t))的; 一个滤波器控制部分(20)从在自适应模式切换到自适应滤波器(16)到非自适应模式当检测判断部(19)判断所需信号的可能的存在,并根据非自适应模式的切换 自适应模式当检测判断部(19)判断不存在期望信号的; 限制性的自相关信号的信号电平限制部分(18)(X(t))的所述平滑信号的信号电平(A1(T)); 以及解调部分(18b)的解调具有由限制装置限制以产生一解调信号的信号电平的自相关信号(X(t))的。