6th order bessel filter

Started by tameze sylvianne in Matlab DSP19 years ago 2 replies

Hello, I'm a beginner in Matlab. I would like to program a 6th order bessel Low pass filter using matlab. My specifications...

Hello, I'm a beginner in Matlab. I would like to program a 6th order bessel Low pass filter using matlab. My specifications are as follow : Cutott frequency 8.2MHz and my sampling rate is 52.32 MHz (for DVD purposes). My Code is the following clear all


EPP mode control using parallel port

Started by rohi...@yahoo.com in Matlab DSP16 years ago

Hello friends, I am trying to interface an ADC (10KHz sampling freq)to the parallel port.But i donot know how to use EPP mode of parallel port...

Hello friends, I am trying to interface an ADC (10KHz sampling freq)to the parallel port.But i donot know how to use EPP mode of parallel port using MATLAB. How can i acquire the samples quickly? Please reply as soon as possible.


fractional delay filters when sampling at nyquist rate

Started by cathy zuccini in Matlab DSP16 years ago

Hi, I'm working on a DSP project (speech coding and synthesis) involving fractional delay filters. I would appreciate it if you can send me...

Hi, I'm working on a DSP project (speech coding and synthesis) involving fractional delay filters. I would appreciate it if you can send me matlab codes for implementing fractional delay filters with baseband and fullband approximation, errors between FIR filters designed using these two methods, IIR design of FD filters as well as any other documentation about FD


Ripple value in Matlab firpmord function?

Started by datu...@gmail.com in Matlab DSP14 years ago

Hi Experts, I use matlab firpmord function http://www.mathworks.com/access/helpdesk/help/toolbox/signal/firpmord.html In help file it give...

Hi Experts, I use matlab firpmord function http://www.mathworks.com/access/helpdesk/help/toolbox/signal/firpmord.html In help file it give the following example: rp = 3; % Passband ripple rs = 40; % Stopband ripple fs = 2000; % Sampling frequency f = [500 600]; % Cutoff frequencies a = [1 0]; % Desired amplitudes % Compute deviations dev = [(10^(...


Re: Digest Number 88 - Frequency and FFT

Started by Anonymous in Matlab DSP21 years ago

Aloha Aloha! The Digital Spectrum, calculated by the FFT, is a sampling of the true analog spectrum. If you want to have the...

Aloha Aloha! The Digital Spectrum, calculated by the FFT, is a sampling of the true analog spectrum. If you want to have the frequency samples to coincide with "Fs" sub-multiples, then you can either do what you have done first, that is, use a number of points withou


sigma- delta A/D converter in matlab simulink.....

Started by shivaprasad hanchate in Matlab DSP17 years ago

hello, i am a B.TECH 3rd year student in Electrical and electronics and i am learning matlab and planning to do project in...

hello, i am a B.TECH 3rd year student in Electrical and electronics and i am learning matlab and planning to do project in Matlab. can u please explain me the following i have a doubt in it the Over sampling Sigma-Delta A/D converter in Matlab Simulink


help me in sampling a bandpass signal...

Started by Nosheen in Matlab DSP14 years ago

hi, how can i generate an impulse train(time domain of period T) in matlab whose fourier transform gives me the same impulses of period...

hi, how can i generate an impulse train(time domain of period T) in matlab whose fourier transform gives me the same impulses of period 2?/T... actually i have generated an impulse train(of limited length) in time domain, but when i take its FFT, the result gives me a discrete impulse of high amplitude at t=zero and zero for all other values. infact m trying to do imulse train sa...


Taking FFT of Oscilloscope Based Data

Started by matlab_fft in Matlab DSP12 years ago

Hi guys, I am new to DSP related stuff, I have been trying to take the FFT of data taken from oscilloscope. It consisted of 2 Million points,...

Hi guys, I am new to DSP related stuff, I have been trying to take the FFT of data taken from oscilloscope. It consisted of 2 Million points, it has two vector one for Magnitude and one for Time. I don't now how to start as I don't know the Sampling Frequency of the signal. As long as I remember that data has frequency of 83K to 94K Hz but not sure. How can I see the frequency response of this ...


Need help on FFT error msg

Started by haiz...@yahoo.com.sg in Matlab DSP14 years ago 2 replies

Hi everyone Tried to write the program for the following question and got the error msg. Appreciate anyone's help please!...

Hi everyone Tried to write the program for the following question and got the error msg. Appreciate anyone's help please! Thanks. QUESTION A signal is represented by the expression: f(t) = 10 sin (1.5t) + 5 sin (2.5t) + 2.5 sin (5t) + 1.25 sin (10t) Use MATLAB to obtain a spectrum (magnitude only) of the signal reconstructed from the sampled signal if the sampling frequency is: a) ...


sampling and processing hints

Started by atun...@yahoo.ca in Matlab DSP12 years ago

Hello, I have time vector and channel output vector in a signal voice data file, how can I start processing, for example, some directions or...

Hello, I have time vector and channel output vector in a signal voice data file, how can I start processing, for example, some directions or hints will be very helpful. My confusion is mainly should I sample the channel output or how the time vector will be linked here or how all these can be combined? Thank you in advance.


how to design an sinc(x).^3 compensated IIR filter in matlab

Started by subrahmanya ks in Matlab DSP16 years ago

Hi, how to design an sinc(x.^3 compensated IIR lowpass filter in matlab?. filter specification are allowed passband ripple = 0.1dB ...

Hi, how to design an sinc(x.^3 compensated IIR lowpass filter in matlab?. filter specification are allowed passband ripple = 0.1dB sampling frequeny = 200kHz cutoff frequency = 15e3; stopband level = -120dB.


filterbanks problem?

Started by omid...@yahoo.com in Matlab DSP15 years ago

This MATLAB program is for making a suitable wavelet kernel It derives the Low pass filter by sampling from analog raised cosine function in...

This MATLAB program is for making a suitable wavelet kernel It derives the Low pass filter by sampling from analog raised cosine function in frequency domain and taking ifft from this function to yield the impulse response. (other filters are derived using orthogonal relations). first i wnat know if the filter design method has any problems? The filter has 2 parameters in frequency domain ...


Query : Digital Acquisition

Started by ahsan_62000 in Matlab DSP14 years ago

Hi, I am Working on a project, which require digital data aquisition from parallel port. I have used a ADC with 8bit & 1MHz sampling rate.I...

Hi, I am Working on a project, which require digital data aquisition from parallel port. I have used a ADC with 8bit & 1MHz sampling rate.I want to take continuous input from parallel port using matlab. Is the matlab can take high speed input from parallel port? and what will be the code for taking values for 10 seconds? If all these possible please send me some material. Thank You...


impulse train sampling

Started by n_no...@yahoo.com in Matlab DSP14 years ago

hi, how can i generate an impulse train(time domain of period T) in matlab whose fourier transform gives me the same impulses of period...

hi, how can i generate an impulse train(time domain of period T) in matlab whose fourier transform gives me the same impulses of period 1/2*pi*T... actually i have generated an impulse train(of limited length) in time domain, but when i take its FFT, the result gives me a discrete impulse of high amplitude at t=zero and zero for all other values. infact m trying to do imulse trai...


Modeling OFDM multipath channel in Matlab

Started by dani...@yahoo.com in Matlab DSP13 years ago 3 replies

Dear all, I am a newbie and I have a basic question which I would like to get clarified. My intention is to simulate 802.11a which is based...

Dear all, I am a newbie and I have a basic question which I would like to get clarified. My intention is to simulate 802.11a which is based in OFDM. From the 802.11a standard I know that: -Number of Subcarriers, Nsc = 64 -Sampling Rate, fs = 20e6 sample/sec -BW = 20MHz -Carrier Frequency, fc = 5.25Ghz Now imagine that I have the following multipath channel: taps_delay = [0 10ns 20ns ...


UWB position location

Started by jask...@yahoo.com in Matlab DSP15 years ago

Dear Friends!! In these days i'm doing research on UWB indoor position location..and I'm new in this field so I need your help: I assumed...

Dear Friends!! In these days i'm doing research on UWB indoor position location..and I'm new in this field so I need your help: I assumed enviroment with 3 BSs (Base station) and one mobile in Line Of Sight, I know position of all 3 BSs and I have to calculate Mobile's position. I used 1st derivative Gaussian monocycle with 0.5nsec duration, and sampling rate is 20 GHz. In my simulation, ...


notch filter-doubt

Started by vani chezhiyan in Matlab DSP18 years ago

hi all, i'm doing preprocessing of ecg signals. i have an ecg signal with sampling frequency 1000hz. i have lowpass filtered &...

hi all, i'm doing preprocessing of ecg signals. i have an ecg signal with sampling frequency 1000hz. i have lowpass filtered & then highpass filtered the signal.now that i want to use a notch filter or comb filter to remove the powerline interference at 60hz( ,180,300,420,5


How can I distinguish the composite wave with DFT?

Started by "gfng.liu" in Matlab DSP14 years ago

Hi,everyone, Happy New Year! I have a wave y(t) composed of two cosine waves and white noise ...

Hi,everyone, Happy New Year! I have a wave y(t) composed of two cosine waves and white noise y(t)=A1*cos(w1*t+phi1)+A2*cos(w2*t+phi2)+w(t); phi1 and phi2 are phases; first, let w(t)~N(0,sigma^2)and white; sampling frequency fs> =2*f2, f1


help me sample this modulated signal

Started by n_no...@yahoo.com in Matlab DSP14 years ago

hi, i m attaching my code kindly help me sample this modulated signal consisting of four channels each at carriers 400,1000,1600 and 2600HZ...

hi, i m attaching my code kindly help me sample this modulated signal consisting of four channels each at carriers 400,1000,1600 and 2600HZ respectively. see also the time domain envelope of the composite signal being AM modulated at these four carriers and the fourier spectrum... how can i implement sample rate variation to extract these four channels??? (impulse train sampling is pref...


Non ideal channels in Matlab

Started by kili...@hotmail.com in Matlab DSP15 years ago

Dear all, I've got a questions about channel modelling. Lets say the channel impulse response of a communication channel is c(t)= δ(t) - δ...

Dear all, I've got a questions about channel modelling. Lets say the channel impulse response of a communication channel is c(t)= δ(t) - δ (t-Ts) Ts is the sampling period. How can I implement this in Matlab? What I need to do is find a combined impulse response of tx , rx filters and channel. I know how to do the filters but not the channel. Thanks....