Questions tagged [beamforming]

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Beam Steering range of a phased array antenna system

What is the beam steering range of a phased array dependent on? For example, if I use an antenna array of Nx1, with a phase shifter resolution of \$\frac{2\pi}{k}\$ and the antenna elements spaced at \...
Vinay Kumar's user avatar
4 votes
0 answers

bearing ambiguity resolve (direction finding) for multiple sources

I am working on wideband direction finding algorithms for passive sensors. I started with Music algorithm. For practical reasons, the spacing can not be maintained lambda/2. For greater antenna ...
Sanjoy Basak's user avatar
3 votes
1 answer

I am having trouble with wide beam of my ultrasonic sensor

I need to measure and detect a gap between two objects. I have an MB7062 (maxbotix) ultrasonic sonar sensor. Due to the wide beam of the sensor (FOV in distance of 2m is about 30cm from the center ...
Mobin Madani's user avatar
1 vote
2 answers

What is the relation between beamforming design and user scheduling in massive MIMO systems?

This may seem like a basic question, but since I am a nonexpert trying to do some collaboration with people working in this field, I need to understand the two concepts. As I understand, beamforming ...
rsch's user avatar
  • 105
1 vote
3 answers

Do beam-forming devices expect a particular antenna configuration?

Do beam-forming devices expect a particular antenna configuration? For instance, do they expect the antennas to be a certain distance from one another? Or parallel to one another? Etc. Background Info:...
user2800679's user avatar
1 vote
1 answer

Nomenclature Issue - What is the origin of the term 'steering vector' in beamforming?

I am new to telecom and developed an interest in beamforming. I've read about its basics here and here, and was intrigued with the name "steering vector". It is clear to me that the steering ...
Humberto Fioravante Ferro's user avatar
1 vote
1 answer

Vertically oriented beams using antenna arrays

Referring to the above picture, can an antenna array mounted on Node A direct beams towards Node B and Node E, without the need for an antenna rotator (or manually orienting the antenna array towards ...
V-Red's user avatar
  • 627
1 vote
1 answer

How to tell the polarization (horizontal or vertical) of a microstrip linear array antenna just by inspection

I know that a linear array of microstrip patches can be either horizontal or vertical depending on its orientation. Does the feed (input port of the array) determine the direction of polarization?
Ahmed's user avatar
  • 11
1 vote
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How to determine beamforming pattern?

I have a beamforming vector, which includes amplitude and phase information. How can I determine the corresponding beamforming pattern for the antenna and plot it in Matlab? For example, I have a ...
Zhenlong You's user avatar
1 vote
0 answers

How to utilize receive spacial beamforming to allocate beams to different transmitter?

Assume there are 2 Base Stations (BSs) each is equipped with \$M\$ antennas serving 1 User Terminal (UT) simultaneously. Say if the UT has 4\$\times\$4 Uniform Planar antenna array, which means it can ...
ZYX's user avatar
  • 11
1 vote
0 answers

Uniform circular array (UCA) beamforming using FFT

As far as I know, conventional beamforming using FFT can return a range-angle map. However, this only works with a uniform linear array (ULA). I'm wondering if the same approach works for UCA. I guess ...
dondon's user avatar
  • 11
0 votes
1 answer

About mobile user beamforming

I know that base station can generate beamforming vector (precoding) by channel state information. If user have multi antenna, mobile user can also do beamforming?
new_be's user avatar
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1 answer

Is an antenna array with a tilted (rotated) antenna element always less optimal than a perfectly aligned antenna array?

Suppose I have a traditional linear antenna array. My element factor follows a cosine shape between 0-180 degrees. The relationship between my theoretical total antenna array pattern and the element ...
Xingda Chen's user avatar
0 votes
2 answers

Hardware implementations for a low-cost ADC array project

I wonder what would be the best hardware platform or architecture for implementing and building a lowish-cost system to sample audio capture over a large array of microphones or sensors? say, 300 or ...
lurscher's user avatar
  • 139
0 votes
0 answers

Converting beam index to angular units

Assume I have a MIMO channel matrix \$H\$ of dimension [\$N_r\$ \$N_t\$ \$N_f\$] where \$N_r\$ are the number of antennas at the receiver, \$N_t\$ the number of antennas at the transmitter, and \$N_f\$...
Waterbottles's user avatar
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Radius of footprint vs altitude: math equation

I want to compare footprint size/beam size of satellite and plot “radius of footprint vs. altitude” variation. ( my main reference( see above) is 3GPPTR38_821/Solutions for {NR} to support non-...
Aid22's user avatar
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1 answer

Why does literature call the response of an antenna array the array "manifold" vector?

Van Trees' Optimum Array Processing and other works (e.g. Wikipedia) refer to an antenna array's response (shifts in phase and differences in gain due to the angle of reception) at each element as the ...
gibbss's user avatar
  • 101
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How well synced do digital channels in a phased array need to be?

In order for a narrowband phased array to be coherent channel to channel, what is the maximum timing jitter that can be tolerated between channels? I assume there can be a constant timing error ...
Gillespie's user avatar
  • 161
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1 answer

Calculating antenna beam footprint from frequency

I need to compute a beam footprint, but I know only the frequency of the beam. How can I compute the footptint?
Anna Koroleva's user avatar
0 votes
0 answers

How to model MIMO channel matrix for numerical results

I am willing to include the channel matrix in my analytical model (which only includes pathloss and antenna gains). But from what I have seen, channel matrix can't be used to produce numerical results ...
medukrin's user avatar
0 votes
1 answer

Phased array receiver circular polarization

In a phased array system, what will have to change in a receiver's architecture if it needs to work for both linear and circular polarization? I saw in one article it is said "Supports automatic ...
Rumman Ahmed's user avatar