## Forums Search for: Adaptive Filter

## kalman filter implementation and basics

inHello, I am very new to adaptive filter. Is there any article about kalman filter basics and its implementation (basically i am first looking...

Hello, I am very new to adaptive filter. Is there any article about kalman filter basics and its implementation (basically i am first looking for matlab implementation). The article in the net is very difficult to understand and implement. Is there any article or reference which easier to understand and implement and not much mathematics and equations. Waiting for reply with regards, pr...

## can this be done in real time???

inI am thinking of programming a dsp development board (no particular model chosen yet) to implement an RLS adaptive filter but with a Volterra...

I am thinking of programming a dsp development board (no particular model chosen yet) to implement an RLS adaptive filter but with a Volterra Series front end to provide an adaptive non-linear equaliser. If this doesn't mean anything to you, take a look at IEEE Trans on Sig Proc Vol 41 No 3 March 1993. If I use a second order Volterra Series would this be computationally too great to achie...

## Speech Recognition

inWhat algorithms are commonly in speech recognition? I have planned to use Fourier Transform (how many samples do you think is good? 4096?) and a...

What algorithms are commonly in speech recognition? I have planned to use Fourier Transform (how many samples do you think is good? 4096?) and a adaptive filter. What do you think? Thanks in advance //Spike

## Why minimising in the mean-error sense.

inHello group. Quote from Simon Haykin's book "Adaptive Filter Theory", 4th edition, on the Wiener filter (chap. 2): "We now summarize the...

Hello group. Quote from Simon Haykin's book "Adaptive Filter Theory", 4th edition, on the Wiener filter (chap. 2): "We now summarize the essence of the filtering problem with the following statement: Design a linear discrete-time filter whose output y(n) provides an estimate of a desired response d(n), given a set of input samples u(0), u(1), u(2),..., such that the MEAN-SQUARE VALUE ...

## Questions about QR-RLS algorithm and antenna beamforming

inHi, 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...

## Which noise?

inDear chaps, I have a problem. I have a signal recorded from a ultrasonic transducer of a chemical reaction. It is rich of noise, expecially...

Dear chaps, I have a problem. I have a signal recorded from a ultrasonic transducer of a chemical reaction. It is rich of noise, expecially the white one. I tried to filter with normal filter (butterworth band pass), but I did not obtained a lot of success. So, I thought was better delete the White gaussian noise with an adaptive filter. I used the demo of Simuling of LMS but I have probl...

## noise..how to regulate it?

inDear chaps, I have a problem. I have a signal recorded from a ultrasonic transducer of a chemical reaction. It is rich of noise, expecially...

Dear chaps, I have a problem. I have a signal recorded from a ultrasonic transducer of a chemical reaction. It is rich of noise, expecially the white one. I tried to filter with normal filter (butterworth band pass), but I did not obtained a lot of success. So, I thought was better delete the White gaussian noise with an adaptive filter. I used the demo of Simuling of LMS but I have probl...

## Please help me regd. adaptive filter techniques

inHi there, I?m going to start my thesis work on Inertial navigation system for mobile Robot(Gyro-inclinometer),so i need to use filter...

Hi there, I?m going to start my thesis work on Inertial navigation system for mobile Robot(Gyro-inclinometer),so i need to use filter algorithm.I?ve some idea about kalman filter,but i would like to know which filter is most suitable to my project.What are the alternative adaptive filter techniques for Kalman filter?Could anyone please suggest me the filter techinque(or where can i find r...

## Echo Canceller: Measuring Performance

inI'm simulating an echo canceller in Matlab, using a FIR adaptive LMS filter. I'm using the standard noise cancelling approach: -adaptive filter...

I'm simulating an echo canceller in Matlab, using a FIR adaptive LMS filter. I'm using the standard noise cancelling approach: -adaptive filter input u(n) = far end speech -adaptive filter output is y(n) -impulse response of echo path is h(n) -near end speech is ne(n) -d(n) = ne(n) + u(n) (*) h(n) ----> where (*) denotes convolution -adaptive filter error single e(n) = d(n) - y(n) -In

## Litterature on adaptive MISO systems.

inHello group, I have been assigned a bachelor project (final thesis) and I'm looking for litterature for some particular subjects. Mainly, the...

Hello group, I have been assigned a bachelor project (final thesis) and I'm looking for litterature for some particular subjects. Mainly, the objective is to cancel noise using an adaptive filter. The system consists of two noise sources and one primary signal, in short, an adaptive MISO filter. I've googled for abstracts, litterature reference and for books at Amazon that describes such sys...

## c6711 dsk & adaptive filter problem

inHi everyone, I'm a student working on modified Griffith-Jim beamforming for my masters project. I'm implementing this algorithm in TI's c6711...

Hi everyone, I'm a student working on modified Griffith-Jim beamforming for my masters project. I'm implementing this algorithm in TI's c6711 dsk, and also using PCM3003 codec to get two input's from the microphones. I'm trying to reduce the background noise using an adaptive filter (its based on NLMS). I have done the implementation in c-code in CCS, but I have a bit of problem with t...

## Adaptive demodulation!

inHi! I have to demodulate a signal (detect the envelope) for which the bandwidth is not known in advance. By filtering out the "noise" with a...

Hi! I have to demodulate a signal (detect the envelope) for which the bandwidth is not known in advance. By filtering out the "noise" with a bandpass filter, I can get a substantial improvement in signal to noise ratio of the demodulated signal. I was thinking about using an adaptive filter of some kind, but maybe somebody already has some expirience or ideas on this. I think that ju...

## books on adaptive filtering

inhi everybody. I'm looking for one (or more) textbook on adaptive filter theory. I'm not interesting in advanced topics, I'm interesting in a...

hi everybody. I'm looking for one (or more) textbook on adaptive filter theory. I'm not interesting in advanced topics, I'm interesting in a well explained book able to drive the beginner inside the matter. a book with some examples or solved exercises would be appreciated. does anyone studied the subject on a such valuable book? e.g. I implemented some adaptive notch filters startin...

## Levinson-Durbin Adaptive Filter....How?

inHi All, I'm just confusing myself with predictors and the Levinson-Durbin algorithm. I've got Haykin's book. So... near the start of the...

Hi All, I'm just confusing myself with predictors and the Levinson-Durbin algorithm. I've got Haykin's book. So... near the start of the book there are diagrams of the different adaptive filter models. I am familar with the identification model and LMStype algorthims. But I'm trying to understand the predictor and Levinson-Durbin algorthim. Do these two go together?! In the predictor...

## systolic implementation

inHi, Do you have examples (or simulation) of systolic implementation of the QR-RLS algorithm in Adaptive Filter Theory (Haykin's book)? I found...

Hi, Do you have examples (or simulation) of systolic implementation of the QR-RLS algorithm in Adaptive Filter Theory (Haykin's book)? I found it difficult to understand just by reading! Thanks.

## Echo Cancellation

inHi, I have a problem where I send a signal and listen for reflections of different surfaces but I dont want to listen for signals that...

Hi, I have a problem where I send a signal and listen for reflections of different surfaces but I dont want to listen for signals that are reflected of two or more surfaces. How can I use an adaptive filter to remove these kind of reflections? Any help on this topic will be greatly appreciated. Thanks, Jack This message was sent using the Comp.DSP web interface on www.DSPRelated...

## adaptive filter

inhi all, i have to design an adaptive filter using Matlab. What i need is to find a symmetric FIR filter from 2 signals, desired and input. I...

hi all, i have to design an adaptive filter using Matlab. What i need is to find a symmetric FIR filter from 2 signals, desired and input. I don't know why my results cannot be converged. I'm using NLMS algorithm. Here are my code. Can anyone help me to find my wrong part, or can give me a suitable one? Thks so much function h = adp_filter(d,x,f0) % h = adp_filter(d,x,f0) % Inputs: % ...

## Removing White Noise

inHey everyone, I have an audio application, and I'm trying to do some pre/post processing to improve the sound quality. I put in an adaptive...

Hey everyone, I have an audio application, and I'm trying to do some pre/post processing to improve the sound quality. I put in an adaptive filter to try and remove structured noise, but I'd like to remove white/pink noise from the signal somehow.. I've been looking at wavelet techniques, or whatever else I can find. Can anyone recommend a good way to reduce white noise from audio/ A...

## Adaptive Filter - LMS Algorithm

inHello, I am implementing the LMS Algorithm for acoustic echo canceller at a very basic level. In order to adapt the co-efficients of the...

Hello, I am implementing the LMS Algorithm for acoustic echo canceller at a very basic level. In order to adapt the co-efficients of the filter using LMS algorithm, a desired signal is required. This would minimise the error between the output signal(with echo) and the desired signal. I would like to know what is the desired signal that can be assumed here? Since the adaptive filter woul...

## Equalizer / Adaptive filter and VLSI implementation

Hi all, I am new to equalizer and adaptive filter. My tutor told me to minimize a DFE(decision feedback equalizer)'s area while keep its...

Hi all, I am new to equalizer and adaptive filter. My tutor told me to minimize a DFE(decision feedback equalizer)'s area while keep its timing. I got a book named "Pipelined Adaptive Digital Filters" by Parhi. But the book seems aim at high speed. Can you recommend some book or paper on this subject? And is there any available C or Matlab code on DFE(decision feedback equalizer)? ...