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    • 22. 发明公开
    • 극 변조기에서의 디지털 시간정렬
    • 极地调制器中的数字时间对齐
    • KR1020060059885A
    • 2006-06-02
    • KR1020057022679
    • 2004-05-07
    • 파나소닉 주식회사
    • 비드카토마스이.리웨인에스.도게리엘.
    • H04L27/20H03C5/00H04L27/34
    • H04L27/361H03C5/00
    • Methods of and apparatus for digitally controlling, with sub-sample resolution, the relative timing of the magnitude (101a) and phase (101b) paths in a polar modulator. The timing resolution is limited by the dynamic range of the system as opposed to the sample rate. The methods and apparatus of the invention use a digital filter (111) to approximate a sub-sample time delay. Various techniques for approximating a sub-sample time delay using digital signal processing may be used to achieve the approximation. Ideally, the filter will have an all-pass magnitude response and a linear phase response. In practice, the magnitude may be a low-pass and the phase may not be perfectly linear. Such deviation from the ideal response will introduce some distortion. However, this distortion may be acceptably small depending on the particular signal being processed.
    • 利用子样本分辨率数字控制方法和装置,在极性调制器中幅度(101a)和相位(101b)路径的相对定时。 定时分辨率受系统动态范围的限制,而不是采样率。 本发明的方法和装置使用数字滤波器(111)近似子采样时间延迟。 可以使用用于使用数字信号处理近似子采样时间延迟的各种技术来实现近似。 理想情况下,滤波器将具有全通幅度响应和线性相位响应。 实际上,幅度可能是低通,相位可能不是完全线性的。 这种偏离理想的反应会引入一些失真。 然而,根据正在处理的特定信号,该失真可能是可接受的。