in [Hardware]

1/3T allpass design Hey folks, I'm not really a filter expert :). Is it possible to design an allpass filter (with zero latency, so IIR ideally) with phase response 1/3T? (so that each frequency would be shifted of exactly 1/3 of its period) If so where should I start? Thanks a lot! dmnc ... 21 Jan 2010 19:10
relationship between losslessness of an allpass and the l1 norm of the impulse response of the allpass Thanks for your reply, Robert. it's "flat". i dunno if i would call that "lossless". if the gain was a constant 1/2, would this be lossless or not? I guess I'm considering a subset of allpasses for which the mag response is 1 for all freqs, and hence such that the coeffs of the numerator are in reverse order... 20 Jan 2010 12:52
Real Time Interpolation/Resampling Hi, I have a motion control system comprising a realtime component and a non-realtime component. Simple 2D data (position/time) is being streamed from the non-realtime area into a FIFO queue in the realtime area. I have a few things that I'm hoping someone could help me with: The realtime component needs to ke... 20 Jan 2010 15:09
phase of FFT I am new to FFT and have read some online notes and help on FFT. For a discrete time signal, I understand the FFT in Matlab will give conjugate-symmetric phase response. Basically, the phases in the positive and negative frequencies have phases of the same value but opposite signs. However, I read it online at severa... 20 Jan 2010 21:55
Radix-4 Radix-2 ordering I am new to FastFT and have to do project at my new job. I have to do a 1024 point FFT. The sample memory is 128k 1024*128 = 131072 There are 131072 samples I am processing. I have figured it out to that I have to do 8 Radix-4 calculations and 1 Radix-2 calculation. 4^8 = 65,536.0 2*4^8 = 131,072.0 I h... 2 Feb 2010 14:41
Narrowband Rician fading Hi All I have a que regarding narrowband Rician fading, mainly from the simulations point of view. Now for flat Rayleigh fading, when we simulate receiver performance in terms of BER, it is assumed that perfect phase information is availabe at receiver. So the received signal can be written as y=x.*abs(a)+n, w... 20 Jan 2010 05:05
i need books for .... hellow every one tyo have good information about the following two subject 1_ space time trellis code (STTC) 2_ space time block code (STBC) which books you prefer thanx alot ... 18 Jan 2010 23:14
benchmarking advanced interface using fftw bench Hi, I would like to use the fftw bench program to time the following. Use plan_many_dft from Advanced interface to calculate a bunch of ffts on a contiguous array of complex numbers. Can some one help me with the options i need to pass on to fftw bench program to be able to choose plan_many option. I the readme fi... 18 Jan 2010 10:50
Solving DSP problem Dear Sir, Could you please help me to solve this or give me hints to do so? An analogue signal x(t)=10cos(500πt) is sampled at 0, T,2T, .... with T=1ms. I want to find a cosine y(t), whose frequency is as close as possible to that of x(t), which when sampled with T=1ms yields the same sample values as x(t... 21 Jan 2010 19:10
Solving DSP problem Dear Sir, Could you please help me to solve this or give me hints to do so? An analogue signal x(t)=10cos(500πt) is sampled at 0, T,2T, .... with T=1ms. I want to find a cosine y(t), whose frequency is as close as possible to that of x(t), which when sampled with T=1ms yields the same sample values as x(t). ... 18 Jan 2010 10:50 |