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提问人：网友jianruyun 发布时间：2022-01-06

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信噪比（signal to noise ratio,SNR)是MRI最基本的质量参数，其正确的概念表述应为：（)。A、图像的

信噪比(signal to noise ratio,SNR)是MRI最基本的质量参数，其正确的概念表述应为：()。

A、图像的亮度与暗度之比

B、两个像素的信号强度之比

C、两个体素的信号强度之比

D、图像的信号强度与背景强度之比

E、图像的T1值与背景噪声T1值之比

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更多“信噪比（signal to noise ratio,SNR)是MRI最基本的质量参数，其正确的概念表述应为：（)。A、图像的”相关的问题

第1题

信噪比（signal to noise ratio,SNR)是MRI最基本的质量参数，其正确的概念表述应为：（)。A、图像的

信噪比(signal to noise ratio,SNR)是MRI最基本的质量参数，其正确的概念表述应为：()。

A、图像的亮度与暗度之比

B、两个像素的信号强度之比

C、两个体素的信号强度之比

D、图像的信号强度与背景强度之比

E、图像的T1值与背景噪声T1值之比

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第2题

digital signal can’t be affected by noise （unwanted voltage fluctuations)

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第3题

For AWGN channel, 16-PSK requires less signal energy than the 16-FSK for the fixed noise power spectrum density and symbol error rate.

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第4题

【填空题】SINR（Signal to Interference plus Noise Ratio）的中文名称是（）。

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第5题

the signal s（t) shown in figure is transmitted through an awgn channel with noise psd n0/2

The signal s(t) shown in figure is transmitted through an AWGN channel with noise PSD N0/2. Suppose a filter with impulse response h(t) is used at the receiver, the filter output should be: the signal s（t) shown in figure is transmitted thr

A、 the signal s（t) shown in figure is transmitted thr

B、 the signal s（t) shown in figure is transmitted thr

C、 the signal s（t) shown in figure is transmitted thr

D、 the signal s（t) shown in figure is transmitted thr

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第6题

the signal s（t) shown in figure is transmitted through an awgn channel with noise psd n0/2

The signal s(t) shown in figure is transmitted through an AWGN channel with noise PSD N0/2. Suppose a matched filter with impulse response h(t) is used at the receiver, the matched filter output should be: the signal s（t) shown in figure is transmitted thr

A、 the signal s（t) shown in figure is transmitted thr

B、 the signal s（t) shown in figure is transmitted thr

C、 the signal s（t) shown in figure is transmitted thr

D、 the signal s（t) shown in figure is transmitted thr

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第7题

1. Consider the design of a high-quality direct broadcast satellite link operating at 4 GHz, transmitting a television signal with a bandwidth of 5 MHz. A typical noise temperature is of the order of

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第8题

Nyquist Theorem tells a theoretical bound on the maximum rate is related to ______.

A、baud rate

B、coding error

C、signal intensity

D、noise intensity

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第9题

A speech signal has a total duration of 10 s. It is sampled at the rate of 8 kHz and then

encoded. The signal-to-(quantization) noise ratio is required to be 40 dB. Calculate be minimum storage capacity needed to accommodate this digitized speech signal.

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第10题

The signal s（t) shown in figure is transmitted through an AWGN channel with noise PSD N0/2. Suppose a matched filter with impulse response h（t) is used at the receiver, the matched filter h（t) should

A. The signal s（t) shown in figure is transmitted thr

B. The signal s（t) shown in figure is transmitted thr

C. The signal s（t) shown in figure is transmitted thr

D. The signal s（t) shown in figure is transmitted thr

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第11题

the signal s（t) shown in figure is transmitted through an awgn channel with noise psd n0/2

The signal s(t) shown in figure is transmitted through an AWGN channel with noise PSD N0/2. Suppose a matched filter with impulse response h(t) is used at the receiver (coefficient K=1), the peak pulse signal-to-noise ratio is: the signal s（t) shown in figure is transmitted thr

A、18/N0

B、12/N0

C、8/N0

D、4/N0

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