the difference between the upper and lower frequencies in a contiguous set of frequencies

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2
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0answers
47 views

Noise analysis with periodogram. problem with different resolutions

I don't understand what happened in my simulation. I would like to perform a trade off between 2 ways to estimate power in frequency bands. I want to detect spurious frequencies. First method: I ...
0
votes
0answers
32 views

Looking for an algorithm that computes weighted average of frequencies intensity from narrow band in spectrograph

I am searching for the algorithm that takes (audio) signal as an input and outputs weighted intensity of the frequencies of some narrow band (axis X) in time (axis Y). Frequency in the middle of that ...
0
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1answer
72 views

Uncertainty, time-bandwidth product, harmonics

For a signal that is not corrupted with noise, how is the time-bandwidth product affecting the uncertainty or error introduced when extracting the fundamental frequency ? I mean, instead of choosing ...
1
vote
0answers
37 views

Calculate cutoff frequency of filtered data

I am processing data which was put through a low pass filter at some point. Looking at the FFT, I can see that it is less than the Nyquist rate. I am trying to filter another set of data so that the ...
-2
votes
1answer
65 views

Before the birth of computers how people calculated the bandwidths?

In these days we can able to easily calculate the bandwidths with the help of technology, but in olden days where people used the analog phones, how did they calculated the bandwidths?
0
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1answer
55 views

Creating a time domain filter from a frequency domain plot

In figure 11.23 of Monzingo's Introduction to Adaptive Arrays, the author uses a sinewave in the frequency domain to model the amplitude ripple in the passband of a channel of a receiver. What ...
0
votes
1answer
45 views

How to calculate BW ofdm?

HI I have these specification for an OFDM program I was wondering, what is the bandwidth and the sampling frequency? I'm not a student of Digital signal processing, hence I am so confused. ...
0
votes
2answers
73 views

Effects of sampling rate approaching the Nyquist frequency? (not undersampling)

I understand that you need to sample at a frequency greater than or equal to the Nyquist frequency to reconstruct a signal/aliasing etc. I read though that a "more conservative" approach is to sample ...
0
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0answers
22 views

Finding Signal Energy of a continuous signal in the time domain

I have a quick concern regarding an assignment that I'm working on. Currently, to find the signal energy of a continuous signal, we're converting the signal to the frequency domain through a fourier ...
2
votes
2answers
734 views

Technique of sampling a high-frequency signal (Mhz) with a lower sampling rate (khz)?

I currently have a .wav signal that was recorded at a 48 kHz sample rate, with a central frequency of 5.260 MHz and bandwidth of 4 kHz. I'm trying to get some information from this signal, ...
1
vote
2answers
67 views

Why can't we just make all wireless networks use integer multiples of base frequency?

I always wondered why transmission capacity depends on bandwidth. For example, let us say that there is an isolated island. In this island, people decide that all wireless networks use frequencies ...
0
votes
1answer
121 views

Noise Equivalent Bandwith of IIR and FIR Filters?

How do you calculate the noise equivalent bandwidth for an IIR or FIR filter?
0
votes
1answer
88 views

Effect of bandwidth reduction in bit growth

I just want to ask, whenever you reduce a bandwidth of signal by filtering, I wonder why do you need to improve the number of bits used to represent that signal. The number of bit growth is ...
0
votes
1answer
56 views

What factors determine synchronous signal transmission ability of a channel?

So I am Designing a system which would be able to send and receive stereo voice signals.( like a telephone but with full-band stereo voice signals) here is an example to make my question clearer. In ...
0
votes
3answers
172 views

Bandwidth of a composite signal

How to find bandwidth of a composite signal that can be decomposed into five sine waves with given frequencies and having all peak amplitudes same ?
1
vote
1answer
343 views

How are signal bandwidth and MSPS related?

In various software defined radios, there are three important parameters to set when receiving: frequency, bandwidth and MSPS (million samples per second?). What does it mean to receive with a triple ...
2
votes
1answer
541 views

What is the essential bandwidth with the given function?

Let the function be $$ f(t) = e^{-3t} u(t -1) $$ The criterion is set at 70% of the total signal energy. I know how to find total energy, but not how to find the the $W$ (or frequency) at which the ...
4
votes
1answer
1k views

what is proper setting for Fb,Fc in Complex morlet wavelet (cmor)?

I am using Cmor-Fb-FC wavelet transform in matlab environment. Fb is bandwidth and Fc is center frequency parameters. with trail and error procedure I select Fb-Fc as 5-1, and I've got rational ...
2
votes
1answer
281 views

Bandwidth of a communication system

As a rule of thumb, the bandwidth of a communication system with a complex signal must be equal to the bit-rate or symbol-rate? Besides, after reading this post, it is not clear for me how a ...
5
votes
1answer
127 views

Detecting the original bandwidth of upsampled recordings

I have a set of recordings sampled at 16khz, but some of them are upsampled from 11khz and some from 8khz. Quite some of the recordings are noisy. What is the best way to classify the recordings ...
2
votes
2answers
172 views

Spectrum analyser and resolution bandwidth

For the preliminary part of a lab I had to do, I was asked the following question: I get how to do 1.1, but with 1.2, I really don't get what's going on; I really would've thought that the ...
2
votes
1answer
53 views

Laser diode bitrate datasheet

I'm a student studying communications engineering. I'm trying to understand why this particular laser diode is made for 155 Mbps and 622 Mbps. I'm thinking that the bitrate is entirely dependent ...
2
votes
0answers
52 views

Varying signal bandwidth with two signal generators

I would like to emulate a signal with bandwidth (like BPSK) for some testing, but the two signal generators I have access to do not have any BPSK options installed. If I know the frequency (2462MHz) ...
2
votes
0answers
201 views

Calculating a filter's attenuation at a certain frequency from the Q-factor

I'm using the Web Audio API to make a graphic EQ with four BiQuad filters; a highpass, two bandpass and a low pass: You can see each node representing each filter's frequency. It's working nicely ...
5
votes
3answers
239 views

What is the ideal FIR length, given a specific pulse length?

I am trying to ascertain what the 'ideal' FIR filter length should be, given the pulse length $T_p$ of a windowed sinusoid in noise that I seek to filter. As parameters into an FIR filter that I ...
4
votes
1answer
694 views

What is the bandwidth of product of two signals?

For signal $x(t)$ with bandwidth $B_x$ and signal $y(t)$ with bandwidth $B_y$, what will the bandwidth of the signal $z(t)=x(t)y(t)$ be?
0
votes
1answer
482 views

How bandwidth is used in modulation

In a typical Digital cable environment in the US, the spectrum is divided into 6MHz bands. When a tuner locks to a signal at say 800MHz, I would assume that the band for that signal is 797 - 803 MHz. ...
6
votes
1answer
4k views

Relating Bandwidth and Wavelength of a carrier

This came from a homework question, which I've solved. Just need some clarification. I am asked to determine the bandwidth in a given amount of spectrum at a given wavelength. To find this, I know ...
7
votes
3answers
2k views

What is the bandwidth of a (real) sinusoidal tone, and pulse?

I would like to know how to go about calculating the bandwidth of: 1) A constant (real) sinusoidal tone 2) A (real) sinusoidal pulse. The question is as simple as that, but I am having a hard time ...
3
votes
1answer
5k views

Bandwidth of a signal using MATLAB

I need to find the bandwidth the signal $x = 50 \operatorname{sinc}(125(t-10))^2$. (Where $\operatorname{sinc}(x)=\dfrac{\sin (\pi x)}{\pi x}$ [normalized] or $\operatorname{sinc}(x)=\dfrac{\sin ...
4
votes
1answer
422 views

Multiband processing in one pass

I want to split signal in multiple bands and process each band. Number of bands is not yet determined, but it would be more then 6 and less then 11 (depending on the collected results) As ...
6
votes
2answers
2k views

How are time resolution and signal bandwidth related?

I am confused by the dual concepts of time-resolution and bandwidth. Often I will hear that a pulse-compressed radar application 'doesnt have enough BW' for some specific time resolution that is ...