Comparing with single photo imaging, a random coincidence noise component is added to the coincidence imaging.

与单光子显像相比，其噪声中增加了与信号强度成正比的随机符合噪声部分。

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The LS channel estimation of OFDM systems can be viewed as a noisy observation of the true channel frequency response, so the noise component can be compressed through subspace projecting.

OFDM系统的LS信道估计可看作真实信道频率响应的一个有噪观察值，因此可采用子空间投影方法对噪声进行压缩。

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Eliminating the volume control component from the inside of the casing reduces the noise in the circuit, allowing the music to be heard more clearly.

ENGADGET: Croon Audio's Original Bluetooth speakers promise not to creak while they're cranked