# Questions tagged [sampling]

In signal processing, sampling is the reduction of a continuous-domain signal to a discrete-domain signal.

1,090 questions
Filter by
Sorted by
Tagged with
18 views

### Resolution after Oversampling, Filtering-Decimation

The ADC I am working on has a resolution of 24 bits and a Signal-to-Noise and Distortion (SINAD) of 108.4 dB. Assuming only quantization noise is present, the Signal-to-Noise Ratio (SNR) of the ADC ...
117 views

42 views

### Bilinear transformation with a high sampling rate (chebyshev filter)

I'm trying to design a digital Chebyshev filter of order 2. This gives the general transfer function If I transform this and simplify I get If I then expand the denominator and then normalize so ...
38 views

### Combining two time series with different cadences (different Nyquist frequencies)...?

If it helps, I want to do perform the below computation in python. Two time-series - 30-min cadence (Nyquist of 24 cycles / day) lasting 27 days, followed by 10-min cadence (Nyquist of 72 cycles / day)...
1 vote
66 views

### How to minimize RMS calculation error due to sampling?

Say I have a sinusoidal signal of 49.93 Hz, which is sampled at 16 kHz. A period of the input signal would then contain 16000/49.93 = 320.448 samples. Naturally, the number of samples has to be an ...
1 vote
114 views

### Sampling a sinusoidal signal smaller than Nyquist rate

If we have a sinusoidal signal at 50 kHz and we sample it by an ADC with a sampling rate of 7 kHz. What would be the output of the ADC? Since the sampling rate is way less than the Nyquist rate (...
724 views

### Why am I getting 2 frequency spikes in a mono tone signal?

I have a single tone sinusoid, and its fft in scilab is giving me double spikes, why is that? Please explain me the concept of why is it happening. ...
1 vote
142 views

### How does downsampling decrease the noise power?

I read one equation from a technical document, i.e., assuming the time-domain white Gaussian noise samples with variance $\sigma_{TD}^{2}$ in dB are sampled using ADC with sampling rate $f_{s}^{ADC}$, ...
49 views

### Noise variance of DT samples from CT track-and-hold signal

(I will be referring to info from these slides in this post, for your reference.) Consider first for comparison a typical CT low-pass filter, without any sampling, for example implemented by the RC ...
32 views

### Symbols to samples at the transmitter and samples to symbols at the receiver

Suppose I have the $N\times 1$ vector $\mathbf{x}$ that contains binary phase shift keying (BPSK) symbols each with power $P_s$ Watts. At the transmitter: I want to convert these symbols into samples ...
78 views

### Sample rate change using Lagrange interpolator

I'm trying to understand how to make Sample rate change by a non integer factor say $K=1.0012$ In real hardware I will be using cubic polynomial but for now I have chosen a linear interpolator. I have ...
64 views

### producing sine signal with few samples

I need to produce a signal of $\sin(2\pi\cdot 60\cdot10^6 t)$, where $t$ in sec, with sample rate of $2^{28}$ Hz. Since the signal has period of $\frac{1}{60\cdot 10^6}$ sec can I somehow sample only ...
80 views

### Sampling a pulse train with a controllable square wave

I have an issue regarding a sampling process of a pulse train in an image sensor based on events. Basically, these are a family of image sensors in which each pixel outputs a train of pulses, and the ...
1 vote
22 views

### Choice of $N_{terms}$, frequency grid in Lomb-Scargle periodogram

I am completely new to signal processing! Please explain as if speaking to someone who knows nothing more than linear algebra and what a Fourier transform is defined as. I am working with an 8-month ...
45 views

### Decoding an analogue signal for a given sampling and signal frequency that aren't in sync

I am trying to decode an analogue signal, that is intended to be converted to a digital one and decoded as USART communication. In the image shown the blue trace is the analogue signal, and the ...
44 views

### Understanding Sampling Frequency

I am new to signal processing and I am unable to understand the concept of sampling frequency. This YouTube video presents 20Hz to ...
40 views

### Find constants such that the Nyquist criterion is satisfied [closed]

I have been given the following spectrum, and I want to find a and b such the pulse satisfies the Nyquist criterion, given that the bandwidth of the pulse is 2 kHz and the sampling frequency is 3 kHz. ...
61 views

369 views

### Parallel processing of FIR filter multiple samples per clock cycle

I have an FPGA that is limited in clock frequency, but receives data from a higher sample rate ADC by receiving N samples per clock cycle (all N samples are from a single ADC channel). So the FPGA has ...
1 vote
129 views

### Measuring amplitude of a pure sine wave of known frequency close to the noise floor

What I want to ask you comes from a place where I can play with all the parameters as much as I want (I can measure as long as I want and as fast as I want, as well as change sensor/ADC). The signal ...
Let's say I have a discrete-time signal $y[n]$ that is passed through an Ideal Lowpass Filter (impulse response $h[n]$) to get $y_1[n]$. The filter has cutoff frequencies at $\pm \pi/N$ rad. Now this \$... 