Calculating SNR, THD, SFDR, and SINAD from an FFT is relatively straightforward. I do not have Matlab code for this, but here is the process, assuming you start with a complex FFT generated by Matlab. Also, I am assuming that your input frequency is "Mutua...
When the signal-to-noise ratio (SNR) of a channel is high, the 5/6 coding rate is used to achieve the transmission rate. Number of valid subcarriers In 802.11ac and earlier Wi-Fi standards, 64-point FFT is used to divide 20 MHz into 64 subcarriers. In 802.11ax, 256-point FFT is...
Jitter in the signal (or clock) controlling the S&H switch in an ADC impacts the SNR performance of precision, high speed DAQ signal chains. Understanding the error sources that contribute to the overall jitter is important when selecting the various components that are...
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通过下面的简单分析,可以预测采样时钟抖动对理想ADC的SNR的影响。 假设输入信号由下式给出: 该信号的变化速率由下式给出: 将幅度2πfVO除以√2可以获得dv/dt的rms。现在令ΔVrms = rms电压误差,Δt = rms孔径抖动tj,并代入这些 求解ΔVrms: 满量程输入正弦波的rms值...