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Echo phase compensation apparatus and its application to echo cancellers.
Echo phase compensation apparatus and its application to echo cancellers.
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机译:回波相位补偿装置及其在回波消除器中的应用。
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摘要
1. Device for compensating echo phase for data transmission employing an echo cancellation device consisting in actualizing the natural phase theta n of the echo, at each sampling instant nT, from a magnitude dwn , said magnitude dwn representing the imaginary part of the product of the conjugated complex echo correction sigma n * by the data signal en obtained at the output of the echo cancellation device, after elimination of said echo, said product being multiplied by a coefficient alpha of proportionality, said system being characterized in that it comprises means (37) for adding, at each sampling instant, the slow phase variation un with the rapid phase variation wn , said addition means furnishing at the output the natural phase theta n of the echo, said slow variation un being obtained from the increase dwn by first means, said rapid variation wn being obtained from the increase dwn by second means.
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机译:1.一种用于补偿数据传输的回声相位的设备,其使用回声消除设备,该设备包括在每个采样时刻nT处,从幅度dwn实现回声的自然相位θn,所述幅度dwn表示幅度乘积的虚部。在消除所述回声之后,通过在回声消除装置的输出端获得的数据信号en进行共轭复回声校正sigma n *,所述乘积乘以比例系数α,所述系统的特征在于,它包括装置(37 )用于在每个采样时刻将慢相位变化un与快速相位变化wn相加,所述加法装置在输出端提供回波的自然相位then n,所述慢变化un由第一装置从增加dwn获得,所述快速变化wn是通过第二手段从增加dwn获得的。
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