Hi i need help in c-programming for beamforming

Started by yockie82 in comp.dsp14 years ago 1 reply

HI; i am currently doing a research on beamforming. I am doing a simple built up of a beamforming application. i need help in c-programming...

HI; i am currently doing a research on beamforming. I am doing a simple built up of a beamforming application. i need help in c-programming for beamforming. I am implementing a 4 ultrasonic sensor to form a transducer array and i am using beamforming application to help steer the sound wave beamed by the sensors. I am using 4 ultraonic transciever and 4 transciever Ic chip which are then link...


Applying complex weight to real data for beamforming!

Started by northernlights in comp.dsp14 years ago 11 replies

Hi, I am very inexperienced in the area of beamforming and applied DSP. I was wondering if you can help with some basic questions....

Hi, I am very inexperienced in the area of beamforming and applied DSP. I was wondering if you can help with some basic questions. Application: Implement a broadband beamformer for acoustic interference cancellaion on TI chip. Reference: Kevin Buckley's "Beamforming: A Versatile approach to spatial filtering" Question: > Most of the beamforming techniques presented requires applying


Beamforming Applications

Started by somaguy in comp.dsp11 years ago 6 replies

So I've recently been asked to research beamforming as a possible application for hardware-based acceleration. I have a rough understanding of the...

So I've recently been asked to research beamforming as a possible application for hardware-based acceleration. I have a rough understanding of the concept of (receiver) beamforming but I'm at a little bit of a loss as far as how it is applied practically. For commercial beam-forming systems what is the range of array sizes used? From another colleague I've heard that the input bandwidth can be...


Matlab simulation of beamforming

Started by jaheti in comp.dsp12 years ago 5 replies

Hi all, I would like to know how I could model the effect of beamforming in a monte carlo simulation (running Matlab). A simple simulator...

Hi all, I would like to know how I could model the effect of beamforming in a monte carlo simulation (running Matlab). A simple simulator structure for the beginning could be something like: 1.random bit input 2.modulation (M-PSK or M-QAM) 3.beamformer 4.channel 5.demodulation 6.error counter, calculate BER as a function of SNR So, how to implement the beamforming part? Can I do the si...


2x1 TX beamforming vs 2x1 Alamouti

Started by Dani Camps in comp.dsp12 years ago 5 replies

Dear all, I have the following doubt. Consider a 2x1 MIMO system, 2 antennas in the Tx and 1 antenna in the receiver. Which scheme should work...

Dear all, I have the following doubt. Consider a 2x1 MIMO system, 2 antennas in the Tx and 1 antenna in the receiver. Which scheme should work better 2x1 TX beamforming (with perfect knwoledge in the transmitter) or 2x1 Alamouti ? Where I understand by beamforming the following: The MIMO channel matrix is in this case H = [h_0 h_1]. Then the transmitter would perform the SVD of the ch...


Active Beamforming with about 4 elements of transducer's array.

Started by Kacper in comp.dsp12 years ago 2 replies

Hello, I'm interested in active beamforming which using about 4 transducers to find some objects in front of my array of tranducers. I would...

Hello, I'm interested in active beamforming which using about 4 transducers to find some objects in front of my array of tranducers. I would like create something like digital sidescan sonars. Could you tell me where I may find some information about my project or tell me a title of books about active beamforming? Thanks, Paul K. -- Pawel Kasprzak mail: pkacper0@poczta.onet...


Better understanding of beamforming

Started by tander in comp.dsp12 years ago 2 replies

Hi to all, i am currently doing a project on ultrasound beamforming and i would like to ask if anyone of you can recommend me some websites or...

Hi to all, i am currently doing a project on ultrasound beamforming and i would like to ask if anyone of you can recommend me some websites or books that i can read on so as to get a better understanding of the technique itself before starting. Thank you very much :)


adaptive beamforming

Started by sus124 in comp.dsp14 years ago 1 reply

Hi, I am doing a project on robust adaptive beamforming. I wanted to know if there are any open source tools/softwares available for this...

Hi, I am doing a project on robust adaptive beamforming. I wanted to know if there are any open source tools/softwares available for this purpose.I need it at the earliest. So, I would really appreciate if someone could help me out in this regard. Thanks, suhas


MVDR beamforming

Started by asimmasud in comp.dsp11 years ago 1 reply

Hi I am working on MVDR beamforming in frequency domain. Can any one suggest a suitable literature on it? Actually i have difficulty in...

Hi I am working on MVDR beamforming in frequency domain. Can any one suggest a suitable literature on it? Actually i have difficulty in understanding how to make CSDM matrix?


MVDR beamforming

Started by Krishna_11_05 in comp.dsp12 years ago 2 replies

Hi, I have been reading a bit on MVDR beamforming. There are two things that I could not understand. One is, what is meant by output power when...

Hi, I have been reading a bit on MVDR beamforming. There are two things that I could not understand. One is, what is meant by output power when we are talking about a receiver beamformer. Second is why should we want to minimize it? We may miss the signal if outpower is less, right? Can anyone please help. Thanks and regards, Krishna.


Beamforming algorithms needed!!

Started by scc in comp.dsp12 years ago 4 replies

hi, first of all, thanks about your help for my first question here. I'd need something else... I have to develop an effective...

hi, first of all, thanks about your help for my first question here. I'd need something else... I have to develop an effective algorithm for beamforming as a part of my desing. I'm looking for information about the diferent existing possibilities but I'm not finding good articles and documents that explain these algorithms clearly. Could someone tell me where looking for? Thanks!...


Re: Beamforming and MRC basics

Started by Zeph80 in comp.dsp13 years ago 6 replies

I have a very basic question with regards to beam-forming or MRC. When I apply complex weigths for example while doing co-phasing for MRC,...

I have a very basic question with regards to beam-forming or MRC. When I apply complex weigths for example while doing co-phasing for MRC, does this phase rotate my constellation. Everywhere I read , I never see a beamforming effect on the demodulation. Given Im using a PSK kind of modulation,don't these complex weights affect my constellations.After all isnt pSk modulation some form of Sin(wct + ...


Acoustic ULA beamforming

Started by Manny in comp.dsp11 years ago 5 replies

-------------------- DISCLAIMER: Content may contain rubbish intellect/utter stupidity which may cause offence or arouse contempt. Therein...

-------------------- DISCLAIMER: Content may contain rubbish intellect/utter stupidity which may cause offence or arouse contempt. Therein discretion is advised. -------------------- Hello, I've started thinking about the application of beamforming to the direction finding problem in the context of an acoustic system I'm building. It is a DSSS ultrasonic system to which I would like to a...


ADC/DAC for Wimax Beamforming

Started by scc in comp.dsp12 years ago 1 reply

I'm working on the desing of an active beamforming antenna. I'm a beginner and I'm not able to explain why if I have a 21Mhz bandwidth I need an...

I'm working on the desing of an active beamforming antenna. I'm a beginner and I'm not able to explain why if I have a 21Mhz bandwidth I need an ADC of 105MSPS to digitalize the received signal. Which is the minimum sample rate and resolution of the ADC and DAC on A/D and D/A conversion of a signal of 21Mhz bandwidth and why? It should be determinated by the Nyquist freq. but...then why (for wi...


Implementation of CMA algorithm in adaptive beamforming in Matlab

Started by usha181 in comp.dsp11 years ago

Hi all! I am doing a project in beamforming algorithms for smart antennas. I want to know how to define a 32 chip binary sequence in Matlab which...

Hi all! I am doing a project in beamforming algorithms for smart antennas. I want to know how to define a 32 chip binary sequence in Matlab which is sampled at 8 times per chip. I want to use this as the direct path arriving signal and with zero padding, define the multipath signals... Can someone help out please??


diversity and beamforming

Started by alex65111 in comp.dsp12 years ago 4 replies

Spatial diversity and beamforming solves one problem or each method solves strictly own problem? In what these methods are similar among...

Spatial diversity and beamforming solves one problem or each method solves strictly own problem? In what these methods are similar among themselves and than differ?


Problem with Beamforming Implementation in MATLAB

Started by ftoldi in comp.dsp10 years ago

hello, I'm having problems implementing the correct beamforming and don't know where I'm making mistakes. I think the problem is with the...

hello, I'm having problems implementing the correct beamforming and don't know where I'm making mistakes. I think the problem is with the created signal. What's happening is that the beampattern of the adpative filter and as well the optimum MVDR filter are putting gains in the interferes and nulling the signal of interest. And as you can see in the program below I'm just constraint the unitar...


Real Life Beamforming with substandard arrays. Need help forming some sort of solution.

Started by Phil Winder in comp.dsp12 years ago 23 replies

Hi, I'm doing a very simple beamforming/phased array project for a bit of fun. What I have is 4 40kHz ultrasonic transducers being sampled...

Hi, I'm doing a very simple beamforming/phased array project for a bit of fun. What I have is 4 40kHz ultrasonic transducers being sampled at 200kHz. I'm having problems formulating a simple delay and sum beamformer. When I do quite simply delay by so many samples and sum, what I get are answers which are reasonable but wrong. So I cant quite figure out what step I'm missing. The data r...


Questions about QR-RLS algorithm and antenna beamforming

Started by Jeff in comp.dsp16 years ago 3 replies

Hi, I want to simulate an adaptive beamforming algorithm (using QR-RLS). From what I learned, I have the following thoughts and...

Hi, I want to simulate an adaptive beamforming algorithm (using QR-RLS). From what I learned, I have the following thoughts and questions. Because I am not sure whether they are right or not (and the question is still unsolved), I want to get your answer to these. From ?Adaptive Filter Theory? of Simon Haykin, 4th edition, Page 115, "The essence of a Wiener filter is that it minimizes the me...


beamforming

Started by Tobin Fricke in comp.dsp15 years ago 5 replies

I am interested in learning how to do beamforming using quadrature sampling and/or frequency-domain processing. A few years ago I implemented...

I am interested in learning how to do beamforming using quadrature sampling and/or frequency-domain processing. A few years ago I implemented a small beamformer that operated completely in the time domain. This was for seismic array processing; the beamformer combined signals for spatially separated sensors. The 'best beam' was found by simply trying all wavevectors on a two-dimension...