 ## Re:

Hi, My email notification says that someone replied to my forum post "Help on Noise Correlation matrix" but instead I was redirected to this. I have no clue how...

## Re: Help on Noise Correlation Matrix

Got your point. This makes sense. Sorry I didn't get your point earlier. Thanks!!

## Re: Help on Noise Correlation Matrix

Ya certainly my aim was to generate two gaussian noise sequences and show that they are uncorrelated then add some color to it afterwards and show that they are...

## Re: Help on Noise Correlation Matrix

I tried using your expression but didn't see any difference. For complex vectors cross correlation, is hermetian transpose operation not needed? i.e. Rr1r2 = E[r1...

## Re: Help on Noise Correlation Matrix

Thanks for the quick response. So that means for a real scenario we will never get a diagonal matrix. Fair enough!

## Re: Help on Noise Correlation Matrix

Theoretically, the vectors should be gaussian distributed which should mean r1 and r2 are AWGN which further should imply that they are independent and hence r1...

## Help on Noise Correlation Matrix

I was trying to create a Noise Cross Correlation Matrix in Matlab by using the following code:N = 100; % Number of Samplesr1 = rand(1,N) + 1i*rand(1,N);r2 = rand(1,N)...

## Re: How to downconvert a Complex RF signal in Matlab?

By mixing do you mean that i have to multiply "I" with a cosine wave at -10Hz and  "Q" with a sine wave at -10 Hz to bring it to +/- DC? Or is it also possible...

## Re: How to downconvert a Complex RF signal in Matlab?

For every bit I have generated 10 periods of sinewave with the corresponding phase([-1, 1] maps to [0, 90 degree phase]).. i.e. bitrate is 1 Hz => Symbol duration...

## Re: How to downconvert a Complex RF signal in Matlab?

The following is the block diagram for my implementation and I am stuck at the receiver front end marked as "??".

## Re: How to downconvert a Complex RF signal in Matlab?

Hi All, Thanks for shedding some light into my query. I have got the most of it, what you guys mean, and I appreciate it, but still have some bits left.I am using...

## How to downconvert a Complex RF signal in Matlab?

Hi All,I was trying to simulate a digital communication model with a complex rayleigh fading channel in Matlab.The Data is BPSK modulated and is multiplied with...

## Re: Help on Demodulating an 8-PSK Signal

Alright! Now I understand what you mean! One last question or rather doubt. As far as simulating this matlab is concerned do I have to use hilbert transform or...

## Re: Help on Demodulating an 8-PSK Signal

I have some doubts on option 2. That is, is it posssible to apply IQ demod to the same waveform attached above or I have to transmit I and Q for that? If I have...

## Re: Help on Demodulating an 8-PSK Signal

Thanks for that. I tried to correlate in parallel by generating 8 sequences each for one phase. What I see is amplitude peaks for the intended symbols. But the problem...

## Re: Help on Demodulating an 8-PSK Signal

Ya thats what I was exactly thinking :) ..to use a 8-way correlator. But the question is how to convert the phases into realizable bits?(since I wanted to implement...

## Re: Help on Demodulating an 8-PSK Signal

But my question still stands the same.First thing I don't have an complex LO hence there wont be a complex valued baseband. Second thing the real sequence or the...

## Re: Help on Demodulating an 8-PSK Signal

Absolutely, but thats what my question is that how to demodulate the phase information without having an complex waveform?Downconvert means to multiply with a carrier...

## Re: Help on Demodulating an 8-PSK Signal

I exactly understand what you mean but what if you are constraint to using only real sequences for transmission and you have only one DAC and one LO i.e. no quadrature...

## Help on Demodulating an 8-PSK Signal

Hi,I am trying to simulate an 8-PSK communication model in Matlab with real sequence. I have generated the tx signal as shown in the attached figure using 8 different...

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