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    • 76. 发明授权
    • System for noise suppression, transceiver and method for noise suppression
    • 噪声抑制系统,收发器和噪声抑制方法
    • US07035796B1
    • 2006-04-25
    • US10275460
    • 2000-05-06
    • Ming ZhangHui Lan
    • Ming ZhangHui Lan
    • G10L21/02
    • G10L21/0208G10L2021/02085
    • A system with an accompanying method is provided to improve the signal-to-noise ratio (SNR) of noisy speech by suppressing acoustic background noise. The background noise consists of narrow band noise from rotating machine, audio signals from stereo-loudspeakers of audio entertainment device, and other ambient noise. In this system/apparatus, a microphone senses the speech intermingled with the background noise, and another microphone senses the noisy background. In addition, a measurement sensor is used to measure RPM (revolutions-per-minutes) of the rotating machine and two wires are used to acquire audio signals from the stereo-loudspeakers of the audio entertainment device. Furthermore, to provide better suppression performance for the acoustic audio signals, the characteristics of these loudspeakers are used to compensate for the distortion caused by the loudspeakers. Adaptive comb filters and adaptive FIR filters are applied to estimate the ambient noise and suppress the background noise. After processing, the system outputs the enhanced speech signal with higher SNR.
    • 提供具有伴随方法的系统,以通过抑制声学背景噪声来改善噪声语音的信噪比(SNR)。 背景噪声包括来自旋转机器的窄带噪声,音频娱乐设备的立体声扬声器的音频信号和其他环境噪声。 在该系统/装置中,麦克风感测与背景噪声混合的语音,另一麦克风感测到噪声背景。 此外,测量传感器用于测量旋转机器的RPM(每分钟转数),并且使用两根导线从音频娱乐设备的立体声扬声器获取音频信号。 此外,为了为声学音频信号提供更好的抑制性能,这些扬声器的特性被用于补偿由扬声器引起的失真。 应用自适应梳状滤波器和自适应FIR滤波器来估计环境噪声并抑制背景噪声。 处理后,系统以更高的SNR输出增强型语音信号。
    • 80. 发明授权
    • Antenna array for the measurement of complex electromagnetic fields
    • 天线阵列用于测量复杂电磁场
    • US06762726B2
    • 2004-07-13
    • US10345931
    • 2003-01-17
    • Adrian AldenPeter BoulianeMing Zhang
    • Adrian AldenPeter BoulianeMing Zhang
    • H01Q300
    • G01R29/0878G01R29/0814
    • A method and apparatus for measuring an electromagnetic field are disclosed. In accordance with the apparatus an array of substantially identical antenna elements having a substantially shorter length than a wavelength of the electromagnetic field and being equi-spaced are provided. The spacing is larger than approximately three times the length of the antenna elements. Each antenna element is for sensing the electromagnetic field at a predetermined location and for providing a signal in dependence upon the sensed field. By providing antenna elements meeting the criteria set out herein accurate electromagnetic field strengths are measurable absent significant mutual coupling and scattering effects between the antenna elements.
    • 公开了一种用于测量电磁场的方法和装置。 提供了一种基本上相同的天线元件的阵列,其具有比电磁场的波长基本上短的等距离的长度。 间距大于天线元件长度的大约三倍。 每个天线元件用于感测预定位置处的电磁场,并用于根据所感测的场提供信号。 通过提供符合本文列出的标准的天线元件,在不存在天线元件之间的重要的相互耦合和散射效应的情况下,可测量精确的电磁场强度。