Trellis code in matlab code

Started by Anonymous in comp.dsp16 years ago

Hi All Do you have some matlab code for the STTC which will give me some Idea. Any helping material or URL regarding the same will kindly be...

Hi All Do you have some matlab code for the STTC which will give me some Idea. Any helping material or URL regarding the same will kindly be sent to me. I shall be very thankful to you for this act. Regards Kelecha


MATLAB - Digital Filtering in Second Order Sections - Scale Values

Started by Lightbulb85 in comp.dsp6 years ago 7 replies

Hi Everyone, I am struggling to manually apply the scale values to a digital filter I designed in MATLAB using fdatool. I generated the filter...

Hi Everyone, I am struggling to manually apply the scale values to a digital filter I designed in MATLAB using fdatool. I generated the filter (IIR band stop filter consisting of four second order sections) and exported it as an object. I can use MATLAB's "filter" function to filter my data correctly. As a precursor to implementing the filter in C and embedding it onto a hardware device, I...


Finding phase response between signals in Matlab

Started by Anonymous in comp.dsp16 years ago

I'm trying to find the phase response between various signals by using Matlab. I have a bunch of sound recordings of a broadband 50ms...

I'm trying to find the phase response between various signals by using Matlab. I have a bunch of sound recordings of a broadband 50ms chirp underwater with different objects in the water and I wanted to see how the phase responses differ depending on the objects in the water. I was trying to use Matlab's help to look up phase responses, but those all deal with phase responses of filters. ...


how to implement pi/4-QPSK in matlab.

Started by david.deng in comp.dsp16 years ago 9 replies

Does anyone have the matlab code for implementing pi/4-QPSK. Thanks a lot.

Does anyone have the matlab code for implementing pi/4-QPSK. Thanks a lot.


CDMA RAKE Receiver Simulation MATLAB.....Channel Impulse Response.....??

Started by c.saagar in comp.dsp13 years ago 1 reply

Hello everyone, I am a noob in DSP n in MATLAB. Well i hv been workin on the simulation of Rake Receiver using MATLAB. What I have done so far...

Hello everyone, I am a noob in DSP n in MATLAB. Well i hv been workin on the simulation of Rake Receiver using MATLAB. What I have done so far is this: 1. Generated an input random sequence of 8 bits. This input sequence simulates the information signal to be sent to the channel for retrieving by the RAKE receiver. > > input_bit = fix(2*rand(1,8)); > > input_bit_polar = (2*input_bit


what is the unit of the Matlab 2D FFT output matrix?

Started by kiki in comp.dsp17 years ago 4 replies

Hi all, I just have a question about using Matlab's FFT2 to compute the 2D DFT of an image... An image is input as MxN pixels,...

Hi all, I just have a question about using Matlab's FFT2 to compute the 2D DFT of an image... An image is input as MxN pixels, what should be the unit of the frequency domain, that's to say, what should be the unit of the 2D DFT matrix returned by the Matlab FFT2 command? What does each grid of those MxN output matrix represent? If I attach some physical units to the i...


converting Matlab's

Started by rivka in comp.dsp15 years ago

Hi, I'm trying 2 realize the function "butter" as iin matlab, using scilab. So instead of [a, b]=butter(ord,[int1* 2/Freq int2*2/Freq]); I...

Hi, I'm trying 2 realize the function "butter" as iin matlab, using scilab. So instead of [a, b]=butter(ord,[int1* 2/Freq int2*2/Freq]); I write the following: hz=iir(ord,'lp', 'butt', [int1/Freq int2/Freq], [0 0]); a=coeff(denom(hz));a=a($:-1:1); b=coeff(numer(hz));b=b($:-1:1); and I don't get the same results as in matlab. What do I do to get the same results? p.s. I'...


new to FFTW - I have some questions

Started by jawilson in comp.dsp16 years ago 7 replies

Hello, I am new to using the FFTW algorithms in C++, and need some help getting started. I have used matlab (and done a good deal of C++)...

Hello, I am new to using the FFTW algorithms in C++, and need some help getting started. I have used matlab (and done a good deal of C++) for many years, and I am rewriting some of my matlab code in C++ to see if it helps with speed/memory issues. I'll give an overview of what I'm trying to do, and see if anyone has suggestions. So, I am reading in a MAT file, and the data I want is stor...


generating step output : matlab issues

Started by ganesh in comp.dsp11 years ago

hi, I have a transfer function. I want to find the input waveform which will give me a step waveform at the output. If H is the...

hi, I have a transfer function. I want to find the input waveform which will give me a step waveform at the output. If H is the transfer function, I try to find x(t) by taking the inverse laplace of 1/(s.H). But if I feed x(t) back to H, I do not get the output as a step. Instead I get something else totally different. Is my matlab code given below ok? The matlab code is below %defin...


How to let the Toeplitz Matrix Seperate in H0&H1 in matlab

Started by ericknightX in comp.dsp15 years ago 6 replies

hi all , Currently I am generating Blind Channel Estimation OFDM in Matlab. Meanwhile I have a problem in generate the Channel Impulse...

hi all , Currently I am generating Blind Channel Estimation OFDM in Matlab. Meanwhile I have a problem in generate the Channel Impulse Respond. Example : C=[1 2 3 4 0 0 0 0]; R=[1 0 0 0 4 3 2]; H=toeplitz(C,R); 1 0 0 0 4 3 2 2 1 0 0 0 4 3 3 2 1 0 0 0 4 4 3 2 1 0 0 0 ...


laptop for matlab

Started by pravi in comp.dsp12 years ago 6 replies

Hello all, I need to buy a new laptop mainly for doing compute intensive 3D image processing using Matlab. Does anyone have any suggestions for...

Hello all, I need to buy a new laptop mainly for doing compute intensive 3D image processing using Matlab. Does anyone have any suggestions for a good configuration or product suggestions? Thanks in advance. Ravi.


matrix inversion in matlab

Started by delechelle in comp.dsp15 years ago 4 replies

Hi I need to inverse a rather large matrix. Using 'inv' takes much time and I need to speed this up. What I actually have is the the...

Hi I need to inverse a rather large matrix. Using 'inv' takes much time and I need to speed this up. What I actually have is the the follwing: B=V*D*V^{-1} Where V is an eigenvectors matrix, and D the eigenvalues diagonal matrix, as [V,D]=eig(A) % in matlab


How to extract IIR coefficients w/Matlab?

Started by Mark in comp.dsp17 years ago 8 replies

Hello. 1. Is there an easy way in Matlab to take a z-domain transfer function and extract coefficients for an IIR filter type...

Hello. 1. Is there an easy way in Matlab to take a z-domain transfer function and extract coefficients for an IIR filter type implementation? I first designed my filter in the s-domain and tweaked it to get my desired response. I then used Matlab's c2dm with the Tustin method to get a z-domain transfer function. I am aware of "fdatool" but my filter started out life in s-domain and it...


MATLAB OFDM Simulation

Started by cherianpperumal in comp.dsp15 years ago 1 reply

Does anyone know if there is a OFDM simulation in matlab is possible? If anyone has it, can you please share it with me. I have a final sem...

Does anyone know if there is a OFDM simulation in matlab is possible? If anyone has it, can you please share it with me. I have a final sem project that's due next week and am going crazy over this coding. SOS! Thanks.


Walsh codes help improving condition of matrix?

Started by zqchen in comp.dsp15 years ago

[Question] A problem originated in engineering: H is a (N*SF+L-1)*(N*SF) complex matrix and is generated with a Matlab...

[Question] A problem originated in engineering: H is a (N*SF+L-1)*(N*SF) complex matrix and is generated with a Matlab command H=filter(h,1,[eye(N*SF);zeros(L-1,N*SF)]) where h is a L*1 complex vector. C is a (N*SF)*(N*K) complex matrix and is generated with a Matlab command C=kron(eye(N),c) where c is a SF*K matrix whose columns are Walsh codes. I find out with a Matlab program that C'*H'*H...


Getting data into MATLAB through RTDX

Started by romm...@gmail.com in comp.dsp15 years ago

Hi everyone, I am looking for a way to get data off a dsp board into MATLAB using RTDX. I am using an older version(6.1) and do not have the...

Hi everyone, I am looking for a way to get data off a dsp board into MATLAB using RTDX. I am using an older version(6.1) and do not have the Code Composer toolbox(CCS link for IDE or something like that) installed. Is this still possible? If so how? Thank you very much for your time. Rommel


Noisex-92 noises db: how to use it

Started by DWT in comp.dsp13 years ago 4 replies

Hi there, I've downloaded Noisex-92 (Matlab M) files from: http://spib.rice.edu/spib/select_noise.html How can I add this noise with the...

Hi there, I've downloaded Noisex-92 (Matlab M) files from: http://spib.rice.edu/spib/select_noise.html How can I add this noise with the desired SNR (0-20dB) to the signal in Matlab? Thanks


any users of Mathematica signals and systems? comparing it to Matlab signal processing tool box

Started by superman in comp.dsp17 years ago 2 replies

hi; I am looking at Mathematica signals & systems package, latest version, and comparing its features to Matlab's DSP toolbox. Has anyone...

hi; I am looking at Mathematica signals & systems package, latest version, and comparing its features to Matlab's DSP toolbox. Has anyone used MMA signals&systems package who like to share their experience? I am trying to create a butter low pass filter. in matlab, one writes [z,p,k]=butter(n,Wn); where n is the order of the butter filter, Wn is the cutoff normalized frequency...


Complex FFT in DSP vs Matlab

Started by Anonymous in comp.dsp15 years ago 13 replies

Hi, everyone! I use TMS320c6713 DSP. I compared result of complex fft library in TI DSP with result of complex fft in Matlab. Those waveform...

Hi, everyone! I use TMS320c6713 DSP. I compared result of complex fft library in TI DSP with result of complex fft in Matlab. Those waveform in frequency domain are similar, but exactly not matched. It means.. Range of result in DSP library is wider than one in Matlab. Why? Regards.


MATLAB clones?

Started by Airy R. Bean in comp.dsp18 years ago 4 replies

For those of us not blessed with free access to Matlab based upon job or Alma Mater, what is a good choice in the clones? www.scilab.org is...

For those of us not blessed with free access to Matlab based upon job or Alma Mater, what is a good choice in the clones? www.scilab.org is given as a good one, but I cannot get to it from here in the evenings, for some reason (although tracert get to it in 35 msecs)