Description:
Digital Signal Processing using computers.
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Article versions
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Hi, I'm looking at the paper "Restoration of nonlinearly distorted magnetic recordings", Preis & Polchlopek at ICASSP '83. Can anyone tell me if the paper of the same title in JAES February 1984 adds anything, or is it just one of those duplicates? Thanks! Martin
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How to install 6701 evm
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hi i have a 6701 evm (DNA),and also have the software package i want to install it with PCI under win2k. but i have tried many times there's always something wrong. my ccs setup always have a red "?" on "BYPASS". could someone post a detailed processing of install it many thanks
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Code for generating 1/f^alpha pink noise
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Hi, In a recent project I required a source of 1/f^(5/3) pink noise, but was unable to find any code or explanation on how to perform that. The DSP Generation of Pink Noise page[1] contains extensive information on generating 1/f pink noise, but has no mention of 1/f^alpha pink noise. I therefore made my own code for the purpose. It produces pink noise by... more »
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FFT spectrum height question
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I have implemented Jens Joergen Nielsen FFT code in my windows program that converts V(t) to V(f). I am using 2500 Hz sampling with N=8192 point FFT. I am plotting the FFT amplitude as sqrt(Re^2 + Im^2)/N. Im getting the correct peak frequency after FFT, however, I am getting only about 1/2 of the peak amplitude (of the input sine wave input amplitude) with... more »
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Noise Shaping and Clipping
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Consider a requantization system with noise shaping and dithering. The question is what to do when the sum of the signal, the noise feedback and dither exceeds the range of the output quantizer. A differentiator of the Nth order used as a noise shaping filter has the max. feedback of ~2^N. So it is quite likely that the quantizer will run... more »
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Help! A puzzlement about noise sampling & reconstruction.
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a bandlimit white noise x(t) with PSD of S0 is sampled (no aliasing) to produce x[n]. The PSD of x[n] is calculated to be S0/Ts (Ts is the sample period). Now I just reconstruct the continuous noise xr(t) by passing x[n] impulses to the ideal reconstruction filter (gain=Ts, -fs<f<fs). The output PSD is calculated to be S0/Ts*Ts^2=S0*Ts. There is an offset... more »
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Multirate filters
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hi all, I am working on polyphase filter bank design. I want some pointers on (i)how to avoid aliasing from other bands? (ii)what are the important steps while considering the design of prototype filter? (iii)How to avoid the amplitude distortion? (iv)How to design filter banks with different passband widths?... more »
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