Questions tagged [array-signal-processing]
Signal processing for data collected with an array of sensors.
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How to sync two similar lists/waveforms with differently populated data in python?
I have two lists of sizes L1 - 22400(865*26) and L2 - 79000 with measurements of some environmental data. Data of both the lists are measured simultaneously. The L2 is a continuous measurement for ...
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BERT (bit error rate test with ADC )
I'm trying to make a digital decoder. I sample a digitally modulated signal with the LTC2387, an 18-bit 15MHz SAR ADC. The carrier signal is at 2.1MHz, and is digitally mixed down to DC to obtain the ...
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Rician Frequency Selective Channel Model
I have a question about Rician channel with $L$ taps.
The frequency selective Rician fading channels with delay spread of $L = 6$ taps are considered for both direct link and reflecting link, where ...
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Time step (skipping) in CWT function with PyWavelets
I am using cwt function from pywavelet to perform time-frequency decomposition of a large signal (several million samples). The computational requirements for this is huge, sin it performs the ...
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How to solve the overlapping problem in ultrasound
I am working on ultrasound signals, which in general are narrowband and short duration, however, my aim is to use spread spectrum signals that give wider bandwidth.
The problem with such is that upon ...
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Understanding about correlation between random variables in context of Wireless Communication
I am trying to understand about correlation between random variables in context of wireless communication.
In research papers related to 6G, I came across the following statements:
Suppose there is a ...
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DOA beam pattern for circular array
Based on the tutorial for a linear array here, I've written the following code for a 6 microphone circular array. The array has a radius of 5cm. A beam pattern is generated but it doesn't look right ...
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Determining system clock frequency for a given sampling rate and number of channels
I am designing a multielectrode application on fpga. I am recording from multiple electrodes at a sampling rate of 2KHz. Lets say I want to create 60 channels for reading from 60 electrodes. My ...
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Complex Gaussian distribution in snapshot model
In Chapter 5 of the Optimum Array Processing by Harry van Trees [1], the formula of the complex Gaussian distribution appears very different from the formula that is used elsewhere in the same book ...
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How to find the pattern of a signal or main cycle of a signal?
I have a dataset where a certain pattern is repeatating in different time interval. The repetation of data pattern can come with slight change. I want first find the pattern (or cycle) and later by ...
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Using exported (From Workspace Block) Signal in Simulink as input signal to a filter
I have generated some ECG Signals in MATLAB workspace and then exported the signal data in the Simulink using the from Workspace Block. Now, I want to use the exported signal as an input signal to a ...
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Calculation of a position from the angles of arrival
For locating a target by TDOA (Time Difference Of Arrival) with $3$ stations we have the Chan method which gives an exact solution of the position.
I keep the $3$ stations but instead of measuring the ...
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Elevation angle estimation from L-shaped antenna array
I have TI IWR6843ISK-ODS radar sensor and need point cloud data as output from it. The antenna arrangement is as follows:
I would like to know how to estimate elevation angle with this antenna ...
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error on angle of arrival
I have $2$ sensors allowing me to measure angles of arrival. These sensors are a distance $d$ ($d \simeq 10$ m) apart and the target to be located is at a distance $R$ with $d<<R$. In the ...
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Grating lobe in ULA exhibits a jump
The beam pattern of a uniform linear array is
$$B(\theta) = \frac{1}{N} \frac{\sin(\frac{N}{2} \frac{2\pi d}{\lambda} \cos(\theta))}{\sin(\frac{1}{2} \frac{2\pi d}{\lambda} \cos(\theta))}$$
where $N$ ...
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