Adaptive Filter | ADPCM | ADSP | ADSP-2181 | Aliasing | AMR | Anti-Aliasing | ARMA | Autocorrelation | AutoCovariance | Beamforming | Bessel | Blackfin | Butterworth | C6713 | CCS | Chebyshev | CIC Filter | Circular Convolution | Code Composer Studio | Comb Filter | Compression | Convolution | Cross Correlation | DCT | Decimation | Deconvolution | Demodulation | DM642 | DSP Boards | DSP/BIOS | DTMF | Echo Cancellation | Equalization | Equalizer | ETSI | EZLITE (Ez-kit Lite) | FFT | FFTW | FIR Filter | Fixed Point | FSK | G.711 | G.723 | G.729 | Gaussian Noise | Goertzel | GPIO | Hilbert Transform | IFFT | IIR Filter | Interpolation | Invariance | JTAG | Kalman | Laplace Transform | Levinson | LPC | McBSP | MIPS | Modulation | MPEG | Multirate | Notch Filter | Nyquist | OFDM | Oversampling | Pink Noise | Pitch | PLL | Polyphase | QAM | QDMA | Quantization | Quantizer | Radar | Random Noise | Reed Solomon | Remez | Resampling | RTDX | Sampling | Sharc | TI C6711 | Undersampling | Viterbi | Wavelets | White Noise | Wiener Filter | Windowing | XDS510PP | Z Transform

Implementation of a multirate bandstop fir filter

Hello experts, I need to implement a multirate bandstop fir filter on the PC, but not in Matlab, for realtime processing. I already have a bandpass filter based on the classical design [1] and [2]. As stated in this article or by Rabiner/Crochiere, the group delay of a cosine modulated b...

Article on "Antialiasing filteres and multirate systems"

Hello all, Following a small research I conducted after posting my question about antialiasing of ADC samples to sci.electronics.design, I wrote a small and simple article to explain to myself, once and for all, the deal about analog & digital antialias filters, multirate systems and how thes...

Re: re-sampling - sample rate conversion

Here are 3 links that should get you on the right track: http://www.dspguru.com/dsp/faqs/multirate/resampling http://www.dspguru.com/dsp/faqs/multirate/decimation http://www.dspguru.com/dsp/faqs/multirate/interpolation Go with method 1. Say you have a signal sampled at Fs Hz and you...

multirate implementation problem

Hello, How to implement Multirate filtering on a DSP. My problem is how to have a flow in my code, How should the loop of the code be. This because my data is coming at a higher rate (4 MHz) and i am downsampling to slower rate (i.e 500 kHz). so there is no continous flow. Any suggestion or ...

Opinions on "Multirate Signal Processing..." by F.J.Harris?

Dear all, I was thinking of purchasing "Multirate Signal Processing for Communication Systems" by F.J.Harris. Has anyone here used this book, and if so, what are your opinions? Thanks in advance, -- Oli ...

Impulse response of multirate system?

Hi, I was wondering if impulse response of multirate system is defined and can be evaluated? I built a CIC decimator in Matlab, the differential delay is 1, downsample factor is 8. # of stage is 2, transfer function is [(1-Z^-8)/(1-Z^-1)]^2. I realize it is a LTV system. Anyone has idea on how ...

Combine 2 multirate filters

I have 2 serially connected multirate filters. One has 18 taps and the other has 61 taps. The decimation factors are 2, 2. Now I want to combine the 2 filters into one. The new coefficient file has 78 taps by using convolution. In FDAtool, the order is 137 after cascading. I think it is from 137=17+...

ANN: Tyd-IP Code Generator V3.1 released

Version 3.1 of Tyd-IP Code Generator has now been released. Now supporting multirate filter design, designers can create a wide range of IP, including filters, FFTs, NCOs etc. which can be targetted at any FPGA or ASIC. Until, the end of May 2007, the multirate coefficient and VHDL module, will ...

design of iir bpf

Hi, I have to design a 6th order IIR BPF that will allow a multirate filter structure with D==3.How do i start?Is there a matlab function that does this,I mean also incorporates the multirate structure with design of an IIR BPF like butter().I wil greatly appreciate any guidance on this. ...

multirate resampling implementation

Hi , I'm new to multirate filters. I am trying to implement an interp by 3 and decim by 5 multirate filter. Lets say i have 40 taps in the filter. I have 5 sub-filters with 8 taps each. In the 1st clock cycle i input 2 samples to sub-filters 1 and 4 In the 2nd clock cycle i in...

Re: Interpolation and decimation

"seb" wrote in message news:23925133.0401131910.7f22e0a2@posting.google.com... > Hello, > > i am looking for decimation and interpolation technique in order to, > given a sampling rate fs, obtain a new sampling rate like (a/b)*fs. > > A way to to do is to decimate and then use line...

Cascaded Integrator Comb and aliasing experts please help!

Please refer to www.intersil.com/data/fn/fn3651.pdf page 10 top and page 9 bottom. Please correct me if I assume something wrong. On figure 12 (pg 10) you see the aliasing profile of the CIC and how it does it translate to baseband. The filters performance can therefore be estimated. Quit...

Re: low frequency bandpass filters with high sampling rate

ssnyder wrote: > I am trying to design a set of bandpass filters for an audio spectrum > analyzer. Since human perception of pitch is spaced logarithmically > according to frequency, my low pitches have quite low and narrow bandpass > frequencies. This is a very good application for mu...

Multirate filters, MATLAB

Hello, Working on the design of decimation filter for multistage, sample rate conversion. I have designed a filter which represents G(z). With freqz(b,1,1024) I can plot the frequency response of the filter (the coefficients are in "b"). However, its output will be downsampled by, say M = 1...

Using Multirate algorithm for doing pitch shift effect ?

Hi, I'm trying to implements a pitch shift effect (up / down a .wav sound 44100Hz 16bit to different semitones in the range of around 1 octave). My problem is that I need to do it on about 15 sample simultaneously in real time. The classic pitch shift algorithms use too much of processor time...

Need Help: Multirate Systems

hi folks, I need sum help regarding multirate systems. I am currently working on a project where we r developing a Transfer Function model for Kalman Filter (Actually EKF). We have developed a Kalman Filter for Avionics System of an autopilot. In this filter we have GPS (measurements for KF) ...

multirate implementation on fix point DSP and efficiency

Hye, I have a question to try to find a way to improve my processing. I use a multirate filter with decimation. There is a decimation by 40. One FIr is used then decimation, and the 1 IIR with decimation, then a second IIR with decimation, then again oner IIR and decimation and at last one F...

multirate filter response

Hi all; I designed a multirate filter of 3 stages to decimate a signal. the three stages are a CIC(decimate by 4) followed by another CIC(decimate by 4) and finally a half band filter to decimate by 2. Using the Matlab function "freqz" I can plot the frequency spectrum of each stage individ...

Re: What are all the "really efficient" filter algoritms?

Martin Eisenberg wrote: > http://www.musicdsp.org/archive.php?classid=3#39 > Note that I'm writing this from the top of my head because I use > my own adaptation of Dave Malham's code. What I forgot about -- Dave's code directly follows the polyphase formula H(z) = A(z^2) + B(z^2)/z ...

Re: DSP (book) library (was: Oppenheim & Schafer)

"Multirate Systems and Filterbanks" by P.P. Vaidyanathan Indispensible DD ...

multirate filtering and computational gain

It is stated that in case of narrow transition band filters, multirate filtering provides us with a computational efficiency as compare to standard time invariant filters. The idea is to reduce the sampling rate (less number of samples) and to use simple, low order filters (less number of operations...

some suggestions on my octave-band spectrogram analysis in fixed point DSP implementation

i am designing one 1/3 octave band spectrogram analysis I use multirate filter bank to realize that spectrogram. It goes this way 1) first, from the biggest frequency value, I use three IIR bandpass filter, then calculate the std value. 2) Then decimate the input by 2 through(one 30 order...

Re: Fast down sample filtering

Eric Jacobsen wrote: > On 12/9/2009 7:54 AM, km wrote: > > Hi All, > > Does anyone have a suggestion for a fast down sampling filter? > > For N:1 reduction, add N consecutive samples together and output that. > Move to the next window of N samples. > > The response will not be...

Multirate filter

Hi everybody! I'm working on a UWB radar and i have an analog front end that samples the input signal in a nonuniform way. For the reconstruction filter i would use a nonuniform reconstruction algorithm from IEEE transaction on signal processing.These are links : http://www.rle.mit.edu/dspg/do...

Re: oversampling from 8khz to 44.1khz using multistage filter

> 1. Go to the library > 2. Get a classic book on multirate processing by Rabiner > 3. Don't ask any more stupid questions 4. Close all newsgroups. ...

Re: data anomaly detection

On Feb 15, 11:37 am, lakshmanan.meyyap...@gmail.com wrote: > I am trying to develop a data anomaly detector. I basically want to > detect clipped data, spikes, and drifting data to begin with. Any > suggestions on how to do it. What do you mean by drifting? If you're trying to detect hig...

Does Anyone read Mr.Harris's book "Multirate signal processing for communication systems"

Hi, Friends! Does anyone read Mr. Fredric Harris's book "Multirate signal processing for communication systems" ? I think it's a good book for engineering, but some descriptions make me confused. On page 53, Chapter 3 "For a specific example, the filter presented in Figure 3.20 designe...

Re: multirate filter design

Hello, I wrote a blog article a while ago, maybe it's useful (or maybe not...) http://www.dsprelated.com/showarticle/22.php The filter is designed at the intermediate high rate. Cheers Markus ...

Re: Which place is better for the interpolator?

"fjwoemcu" wrote in message news:6pOdnQMkVc9vLzrYnZ2dnUVZ_vShnZ2d@giganews.com... > > In an ADC - rate converter/filter - DSP chain, > the interpolator(cubic, linear...) may be placed between sigma-delta ADC > and rate converter/filter to approximate 310MHz-sampled data to > 300MHz-...

Solution's Manual Required

Hello, I need solution's manual for Multirate Filters and Systems Banks by PP Vaidyanathan. Thanks a lot. Regards Awais ...

harris errata?

I'm working my way through fred harris's Multirate Signal Processing text and have found at least one error. Does anyone know of a site where errata have been published for this book? Maybe it's time to start an unofficial site. I'll make the first contribution! Hugh ...

Multirate filter

Hello, I have two signals, one sampled at 20 Hz and the other at 8 Hz. The filter I want to use is: out[n] = (1 - a) * (out[n-1] + in1[n]) + a * in2[n]; where: in1 @ 20 Hz in2 @ 8 Hz the math is done @ 20 Hz. How should I take care of the different sampling rate? Thanks Marco ...

Re: Book Recommendation

Multirate digital signal processing by N. J. Fliege Wavelets and filter banks by Gilbert Strang Digital Signal processing, system analysis and design by Paulo Diniz ...

Re: Applying hilbert transform close to DC

Aaron wrote: > > There is no silver bullet. You can do Hilbert transform using multirate > > filterbanks; that takes less computation. > > > That's useful information but as Al pointed out it won't really solve > my problem as I still require the phase shift close to DC and multira...

Re: Crossover networks. Can someone recall the name?

On Wed, 14 Dec 2005 16:44:44 GMT, Vladimir Vassilevsky wrote: > > ... assuming that it was designed as an approximation to a Gaussian > > response. > > No. Assumming the reasonable rolloff speed and passband flatness. You mentioned exp(-x^2) specifically. That's a Gaussian. > > ...

Re: How to obtain X(z^1/2) from X(z)

Thank you all for your answers. I response to each one in the order of arrival. I just put two references I use after : [1] Multirate Digital Filters..., Vaidyanathan. http://www.systems.caltech.edu/dsp/ppv/papers/ProcIEEEmultirateTUTExtra.pdf [2] Principles of fractinal delay filters, VälimÃ...

Re: STUPIDENT::Re: Common practice - Aliasing in transition region?

dc.to.uv@googlemail.com wrote: > On 7 June, 14:23, Vladimir Vassilevsky > wrote: > > > That's all in your textbooks, my friend. > > > Any pointers to a textbook that describes actual usage would be > helpful, if slightly unusual. L. Rabiner "Multirate Signal Processing" ...

Re: FDAF (Frequency domain adaptive filter)

Refer to: J.J.Shynk, Frequency Domain and Multirate Adaptive Filtering, 1992, Signal Processing Magazine. The performance of the algorithms is usually evaluated using white noise and the stepsize should be taken into account also. Leans Nelson ...

[Q] How can the chirp-z transform be used in resampling?

DSP Gurus: I'm familiar with the classic interpolate-filter-decimate approach to multirate DSP. I've heard that the chirp-z transform can be used to resample a signal also. Can anyone provide additional information or references (other than Google search results)? Thanks, OUP ...

Sampling rate conversion

Hi All I have a carrier modulated signal which is sampled at 48KHz and 12 samples/symbol. Now, I want to resample this signal, so that the new signal has sampling rate of 47968 Hz. Is there any possible way of doing it.? I totally new to this multirate dsp topic. Your opinion matters...