i have a signal y=h*s+n where * indicates convolution. how can i determine numerically the power spectral density of 's' ,if i know...

i have a signal y=h*s+n where * indicates convolution. how can i determine numerically the power spectral density of 's' ,if i know 'y','h' and i know power spectral density of 'n' and i donot know 's'.

i have two signals, one is the tranmission waveform, the other is received one, can any one tell me how to get the SNR of my received...

i have two signals, one is the tranmission waveform, the other is received one, can any one tell me how to get the SNR of my received waveform,. the waveform consists of bits which has shape of raised cosines, i tried to get the power of the signal from the PSD but i dont know how to integrate the power at all frequencies to get the power of the signal ne clues

Hi, I'm newbie in DSP. I have question related to transmit power. My scenario is that I have a set of signal value to be transmitted and I...

Hi, I'm newbie in DSP. I have question related to transmit power. My scenario is that I have a set of signal value to be transmitted and I want to have transmit power about 5dBm. How can I set it? Thanks a lot.

Hi, Why should the CLKOUT pin in ADSP2181 may also be disabled to reduce external power dissipation ? How does it contribute to...

Hi, Why should the CLKOUT pin in ADSP2181 may also be disabled to reduce external power dissipation ? How does it contribute to power dissipation ? Thx in advans, Karthik Balaguru

Hi, Why should the CLKOUT pin in ADSP2181 may also be disabled to reduce external power dissipation ? How does it contribute to...

Hi, Why should the CLKOUT pin in ADSP2181 may also be disabled to reduce external power dissipation ? How does it contribute to power dissipation ? ( I posted this earlier. But it did not appear :(:( ). Thx in advans, Karthik Balaguru

hi, i have two very noisy signals, and i am hoping to generate some sort of "diff" of the two signals in frequency space. so far, i...

hi, i have two very noisy signals, and i am hoping to generate some sort of "diff" of the two signals in frequency space. so far, i have computed a power spectral density estimate of each of the two signals. then i subtracted the PSD of one from the other (the idea being that frequencies where one has low power and the other high power, i should see a big difference... positive or negati...

Frontech UPS Power 60 JIL-2507 :- Features: * Line Interactive design. * Boost and bulk AVR (Auto Voltage Regulation). * Fully...

Frontech UPS Power 60 JIL-2507 :- Features: * Line Interactive design. * Boost and bulk AVR (Auto Voltage Regulation). * Fully Digitized microprocessor controlled. * Energy saving function (UPS green mode). * 50/60Hz frequency auto sensing and selection. * Cold start function (DC power on) * Lightning and Surge protection. * Short Circuit and Overload prot ...

All, i build two simulink models to watch the benifit of convolutional code. The first one is: Burnoulli bits ----- 16QAM ------...

All, i build two simulink models to watch the benifit of convolutional code. The first one is: Burnoulli bits ----- 16QAM ------ modulation ---- AWGN ----- demodulation. The parameter of 16QAM modulation module is: 'normalizztion method'= average power and 'average power'=1 watt. The parameter of the AWGN channel module is 'Eb/N0'=14.55 and 'input signal power'=1 watt. The BER is about ...

Hello, I really need to optimize this block of code: for(i = 1:33) E(frame,i)=sum(power(samp_borders(i):samp_borders(i+1)).^2); end; I...

Hello, I really need to optimize this block of code: for(i = 1:33) E(frame,i)=sum(power(samp_borders(i):samp_borders(i+1)).^2); end; I wanted to use array indexing instead of the for loop, since it should be faster, but everything I try does not work. power() is the array I'm working on. It is power spectrum data. The squaring and the summing 33 times is just taking way too long for ...

Hi, I am digitizing an analog signal. Now I have real samples of the analog signal. I need to calculate the power of the signal with...

Hi, I am digitizing an analog signal. Now I have real samples of the analog signal. I need to calculate the power of the signal with these samples. Is this possible to calculate the power of the signal? Does it need complex samples to calculate? If complex samples are needed to calcuate the signal power How can I get complex samples from the real samples?

I have N number of time-domain complex signals. And I want to find the corresponding power spectral density of these signals. The usual way...

I have N number of time-domain complex signals. And I want to find the corresponding power spectral density of these signals. The usual way I think is to find the autocorrelation of the signals. Then, the fourier transform of it. My question is, how do I find the power spectral density of complex signals? Autocorrelation of complex signals? Autocorrelation of the magnitude of the complex signals? ...

Hi all, I've some queries regarding the above subj. 1) QPSK is actually 2 BPSK. Is there any difference in their power? What I understand,...

Hi all, I've some queries regarding the above subj. 1) QPSK is actually 2 BPSK. Is there any difference in their power? What I understand, Power (P) = [sqrt(real(signal).^2 + imag(signal).^2)].^2 = amplitude.^2 2) If QPSK requires 2P (BPSK needs P), and I transmit both using the same amplitude, will I get 2P for QPSK and 1P for BPSK when I plot it in terms of power? ...

Hello, I was reading this paper (http://www.kecl.ntt.co.jp/icl/signal/ nakatani/papers/icslp2002f0.pdf) and thought his Power spectra...

Hello, I was reading this paper (http://www.kecl.ntt.co.jp/icl/signal/ nakatani/papers/icslp2002f0.pdf) and thought his Power spectra looks ridiculously high. using 10*log10(S) for the log power of spectrum S, S would need to be about 10^9 to get that high dB range. Or is there some standard that I'm unaware of? In my matlab code, 10*log10(S./min(S)) gives a similar sized spectrum ...

Hello, I got a scaling factor of obtaining the magnitude(amplitude) of a signal from the power spectrum plot (i.e Power = (A/2)*Nfft, where A is...

Hello, I got a scaling factor of obtaining the magnitude(amplitude) of a signal from the power spectrum plot (i.e Power = (A/2)*Nfft, where A is the amplitude of the original signal). This works for different Nfft sizes I took. My problem now is that when I introduced it to my signal which has a decaying factor (exp-beta*t), I was unable to get the same magnitude for different Nfft sizes I tried. ...

Hello My name is Dania, I am new in WiMAX, I am trying to simulate wireless channel for subscriber station (SS), I am using the formula...

Hello My name is Dania, I am new in WiMAX, I am trying to simulate wireless channel for subscriber station (SS), I am using the formula received signal power (RSP): Pr=Pt P0 xR(do/d)? Or in dB Pr(d)[dB] = Pt [dB]+P0 [dB] + 10 ? log(d0 /d )+X[dB] + R[dB] Where Pr(d)[dB] is the received power at SS, Pt [dB] transmitted power from BS, P0 [dB] pathloss at reference distance, ? p

Hello My name is Dania, I am new in WiMAX, I am trying to simulate wireless channel for subscriber station (SS), I am using the formula...

Hello My name is Dania, I am new in WiMAX, I am trying to simulate wireless channel for subscriber station (SS), I am using the formula received signal power (RSP): Pr=Pt P0 xR(do/d)? Or in dB Pr(d)[dB] = Pt [dB]+P0 [dB] + 10 ? log(d0 /d )+X[dB] + R[dB] Where Pr(d)[dB] is the received power at SS, Pt [dB] transmitted power from BS, P0 [dB] pathloss at reference distance, ? p

This part touts an LFO that runs at 12 kHz for low power applications. Why would using this clock result in lower power than using a full-speed...

This part touts an LFO that runs at 12 kHz for low power applications. Why would using this clock result in lower power than using a full-speed DCO clock, actively running 12,000 / 16,000,000 of the time, and sleeping the rest? -- Randy Yates Digital Signal Labs http://www.digitalsignallabs.com

Hi everyone, My question may be a very basic one, but it is really eating me alive. Recently I'm reading Richard Schreier's book - Understanding...

Hi everyone, My question may be a very basic one, but it is really eating me alive. Recently I'm reading Richard Schreier's book - Understanding Delta-Sigma Data Converters. In the Appendix A, he talks about "Spectral Estimation". First, you have a random sequence of which you want to estimate the power spectral density, and you window it - using rectangular or Hann or whatever - then you apply...

Hi, I have a Power spectral density of an EMG signal. I want to calculate total power for different frequency ranges. (For 5-12, 15-30 and...

Hi, I have a Power spectral density of an EMG signal. I want to calculate total power for different frequency ranges. (For 5-12, 15-30 and 30-60) How can I do this using matlab? Thank you very much for your time.

Hi , We are in the business of Electrical Power and Energy meters. One of our products has a feature to grab samples of voltage and current...

Hi , We are in the business of Electrical Power and Energy meters. One of our products has a feature to grab samples of voltage and current waveforms , and apply FFT to those samples , thereby generating data for us like the % content of odd harmonics in each waveform . As the electrical power gets 'dirtier' due to usage of equipment like AC Power Drives and other non-linear loads , this feature...