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? ...

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, 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?

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 ...

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 ...

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 ...

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...

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, 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, 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.

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

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 been looking at the many low power single chip processors available. But most are only 16 Mhz. I know that the higher the speed the more...

I have been looking at the many low power single chip processors available. But most are only 16 Mhz. I know that the higher the speed the more the current. Are there any low power DSP chips available that compare to TI MSPxxx ? Thanks

> Consider a four-input, one-output nonlinear system, say an amplifier. > > I have available the four power spectral density (PSD) curves...

> Consider a four-input, one-output nonlinear system, say an amplifier. > > I have available the four power spectral density (PSD) curves for the > four pseudo-random input signals, and also the PSD, P(f), of the > output signal, where the independent variable f is frequency. > > I would like to know if it is possible to determine the amount of > power present in the output signal that is

Hi there, I am working on spectral shaping coding. I did construct a code book which generate for me nulls at 1/3 and 2/3 of my sampling...

Hi there, I am working on spectral shaping coding. I did construct a code book which generate for me nulls at 1/3 and 2/3 of my sampling frquency besides it is a DC free code. I using a software for power spectral density to see how my spectrum looks like. My problem is that when I use the continuous power spectral density I get the 1/3 and 2/3 nulls. And when I used the discreat power sp...

pls can any body make me understand difference between power signals & Energy signals. why r random signals called power signals. This...

pls can any body make me understand difference between power signals & Energy signals. why r random signals called power signals. This message was sent using the Comp.DSP web interface on www.DSPRelated.com

Hi everyone, I just started with DSP and basically I am trying to go through the material on my own and I am finding it kind of...

Hi everyone, I just started with DSP and basically I am trying to go through the material on my own and I am finding it kind of difficult. I was going through the section on Power of a signal. I understand that the power of a digital signal is defined by the sum of the square of all the signal values. Then I had an exercise question, where the given signal was: y = ASin(wt). Now what ...

Dear all, Hi, I want to do some work in the field of "application of filter bank design in electrical power quality analysis". kindly...

Dear all, Hi, I want to do some work in the field of "application of filter bank design in electrical power quality analysis". kindly suggest me the different options available in the latest trands in the field of power quality analysis with the application for filter bank design. regards

Does the basestation vary the transmit power of PDCH downlink bursts on the same phyisical channel (time slot) depending on which MS it is...

Does the basestation vary the transmit power of PDCH downlink bursts on the same phyisical channel (time slot) depending on which MS it is intended for, or is the DL transmit power constant for all bursts on single PDCH channel? thanks. @8631000@

Consider a four-input, one-output nonlinear system, say an amplifier. I have available the four power spectral density (PSD) curves for...

Consider a four-input, one-output nonlinear system, say an amplifier. I have available the four power spectral density (PSD) curves for the four pseudo-random input signals, and also the PSD, P(f), of the output signal, where the independent variable f is frequency. I would like to know if it is possible to determine the amount of power present in the output signal that is due to nonlinea...