首页> 外文会议>Systems and Control in Aerospace and Astronautics, 2008. ISSCAA 2008. >The Distortion Analysis of the Single Side Band Method for Parametric Loudspeaker Based on Orthogonal Envelope Detection
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The Distortion Analysis of the Single Side Band Method for Parametric Loudspeaker Based on Orthogonal Envelope Detection

机译:基于正交包络检测的参量扬声器单边带方法失真分析

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According to the Hilbert transform properties, the self-demodulated signal’s distortion of the Single Side Band (SSB) method for parametric loudspeaker is analyzed theoretically by employing the orthogonal envelope detection method. It is proved that there is no distortion in the self-demodulated signal of the single side band method when a single-frequency signal is inputted, but the distortion is quite high when a wide-band signal is inputted, by which the incorrect concept existing for a long time that there is no distortion existing in the self-demodulated signal of the single side band method is rectified. Furthermore, a squared envelope distortionless condition for the signal processing methods of parametric loudspeaker is presented to provide an effective criterion for their development. A method to reduce the inter-modulation distortion of the single side band method for parametric loudspeaker by introducing a modulation factor is proposed, and it is also claimed that the method will result in a lower output power of the self-demodulated signal.
机译:根据希尔伯特变换的特性,通过正交包络检测方法,从理论上分析了用于参数扬声器的单边带(SSB)方法的自解调信号失真。事实证明,在输入单频信号时,单边带方法的自解调信号没有失真,但是在输入宽带信号时,失真非常高,存在不正确的概念。长期以来,单边带方法的自解调信号不存在畸变。此外,提出了参量扬声器信号处理方法的平方包络无失真条件,为它们的发展提供了有效的标准。提出了一种通过引入调制因子来减小参量扬声器单边带方法的互调失真的方法,并且还声称该方法将导致自解调信号的输出功率降低。

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