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# Discussion Groups > Comp.DSP

Comp.dsp is a worldwide Usenet news group that is used to discuss various aspects of digital signal processing.

There are 7 threads in our archives.

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## How to count consecutive errors? 0

Jeff - 2005-01-01 13:17:00
Hi, I have asked the question from this group and got the following answer. But the result was not I want. Possibly I did not describe my purpose clearly. I have considered it for quite a while ...

## Question about computation complexity of DFT (and FFT) 0

Jeff - 2004-09-12 15:14:00
Hi, all I am reading the book "digital signal processing" of "Oppenheim & Schafer". In chapter 6, "Computation of the Discrete Fourier Transform", Page 285, it made a calculation of computation com...

## Question about Z transform of decimation 0

Jeff - 2004-09-06 17:48:00
Hi, I am learning about digital decimation. The problem is like this: Z-transform of input sequence and filter aree X(z), H(z) respectively. After the filter H(z), there is a 2 decimation. From one...

## Questions about QR-RLS algorithm and antenna beamforming 0

Jeff - 2004-01-06 09:04:00
Hi, I want to simulate an adaptive beamforming algorithm (using QR-RLS). From what I learned, I have the following thoughts and questions. Because I am not sure whether they are right or not (and t...

## Is the input impulse in this RC filter? 0

Jeff - 2004-01-02 20:53:00
Hi, The RC or RRC filter require the input to be impulse signal. In my following Matlab code, I use modmap at 1:1 frequency ratio to generate I,Q signals. Then these I,Q signals input to rcosflt fi...

## Question about ISI and square root cosine filter 0

Jeff - 2003-12-03 22:30:00
Hi, I want to simulate two cascaded square root cosine filters to decrease ISI in baseband using Matlab. The signal modulation is I, Q type, such as QPSK. When I begin the job, I find there are som...

## Question about communication simulation 0

Jeff - 2003-11-09 22:34:00
Hi, I am running 'Communications error rate estimation' from communication toolbox (Matlab 5.2, communications toolbox 1.3) to learn communication simulation. I have two questions about this progra...