DSP

Digital costas loop design
Thank You very much for your suggestion. But i am working with a digital costas loop design.So,can you help me to get idea about the cut of frequencies and order of the low pass filters used in I and Q phase of costas loop? The output of these filters are multiplied together and pass through a loop filter to strobe... 7 Oct 2009 07:26

Alternatives to CEVA, Tensilica and CoolFlux NXP
Hello, Does anyone know of an alternative DSP core vendor other than CEVA, Tensilica and NXP (CoolFlux). Thanks, Anders ... 1 Oct 2009 21:48

deconvolution problem
Hi, I have a problem with vector deconvolution. This is what I do in Matlab: vect1=[1 2 3 4 5 6 7 8 9]; vect2=[1 2 3 4 0 0 0 0 0 0 0 0 0 0]; %I want to find w with conv(w,vect1)=vect2 Lx=length(vect2)-length(vect1)+1; Lx2=pow2(nextpow2(Lx)); VECT1=fft(vect1,Lx2); VECT2=fft(vect2,Lx2); W... 25 Sep 2009 10:49

Regarding Digital NCO design
Hi, everyone. I need to design a digital NCO for implementing costas loop for carrier recovery. What I know is that NCO is driven by the loop filter output, but I don't know how? I have designed a NCO with a counter and a sin cos lookup table that generates digital sin and cos wave depending on counter value. But h... 23 Sep 2009 22:19

Contribution of amplitude and phase information to human perception of a timbre
Dear all, Does anyone know of any research into the roles of phase and amplitude of frequency domain representations of sound in terms of human perception of timbres. In images, you can take the Fourier transform of two images. You then use the amplitude information from one image, and the phase information f... 23 Sep 2009 08:45

changing sampling rate of filter coeficients
I need to implement a particular filter that has 240 taps and it works/designed for a sampling rate of 125kHz. I want to change the sampling rate of the filter from 125kS/s to 250kS/s to match the the hardware I am using, which operates at 250kS/s if i run the filter as is (at 250kS/s), the spectrum of the filt... 28 Sep 2009 17:01

Pitch recognition of a musical note on a smart phone
Hi. With limited resources such as slower CPUs, code size and RAM, how best to detect the pitch of a musical note, similar to what a tuner would do? Should I use: - Kiss FFT - FFTW - autocorrelation - zero crossing analysis - octave-spaced filters other? Thank you in advance. -mz ... 2 Oct 2009 00:00

PLL and AFC
I am reading and you are confuse me. Differents between PLL ans FLL?? None. In a PLL, VCO output is the frecuency recover, then you have a FLL. I have done an AFC with a PLL. Error signal is get of this form: x=FFT previous y=FFT current z = (complex conjugate of x) * y frecuency... 22 Sep 2009 04:04

SSB FM
Single-sideband FM was a popular topic several years ago but I haven't seen any articles on it since then. It looks attractive as a way to transmit narrowband FM efficiently at VHF over short distances. Does anyone know of current uses for this technology? ... 22 Sep 2009 21:52

FDL / DASIP / S4D 2009 > Invitation to participate
System Design ECSI Events Sophia Antipolis, France September 22-25, 2009 FDL2009 Forum on specification and Design Languages Final Program and registration: www.ecsi.org/fdl DASIP2009 Design and Architectures for Signal & Image Processing ... 14 Sep 2009 20:54