The SETI institute, which searches for extra terrestrial life, has compared picking up a signal’s modulation to picking up the sound of a flute when it’s masked by the noise of a waterfall.
对外星智能的探索研究院，专门寻找外星生物。 它他们对接受到信号的变调和被瀑布声掩盖的笛声做了比较。
2
A new frequency estimation technique for BPSK modulation signals embedded in strong noise is proposed.
在强噪声背景下，针对BPSK调制信号，提出了一种新的频率估计技术。
3
In multimedia signal processing, quantization error is a function of input signal and it results in the audible distortion and noisemodulation in the audio signals.