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Hi,
Have you tried using a signal trace tool like Modelsim, VCS, Questa....etc to see how the signal are changing?
(Highly recommended) (If you have then attach the waveforms, they would be mighty useful)
i) in your definition of DMEM you have hard coded some values.
Depending on the...
Hi,
As klystron mentioned you need to give a approximate location of the unit. As with u-blox, I presume you have gone through this link. Typically inthe event of warm start or hot start you should be able to get the ephemeris data as is. The only problem can be at cold start. Regarding the...
Hi,
There are a multitude of possibilities for ISE throwing an error as such.
i) Are you using a core function corresponding to an ip?
ii) As you mentioned the design might be too large to compile..a factor 1.3 doesn't seem to be much but how many filters are you implementing, polyphase...
You are correct this is not true. i.e. it does not a UD code for this particular type of code. For equilength codes this criteria works better. (i.e. reasonable good assumption for ECC but doesn't work well with data compression)
There could have been a misinterpretation/misrepresentation...
the gaussian channel is modeled by considering noise as a gaussian variable. Typically you vary the variance value over a range to analyse how your channel performs over different variance values. i.e. SNR is a function of variance and you need to consider the for different values.
How to...
High Z is not floating. Floating can be any state more like a "X". Whereas high Z is high impedance state, check for its usage in tri-state buffers as an example for a better understanding.
Conceptually Yes, but create an extra MSB bit so that your using only 1 bit combinational logic. Time wise I suggest you compute the number of bits according to your requirement.
Finite State Machine, is a simple concept which is used to abstract the application into a digital process. Few good...
Hi,
Firstly considering your using a FPGA is rather an overkill you could use a simple 8051 microcontroller to do the job.
Nevertheless, you have a 10KHz clock and get a sample every 10 mins => generate a derived clock e.g. in verilog design a simple 16 bit counter and use the MSB transition...
Hi,
Your comparison is between i) 16-QAM ii) 16-APSK.
Firstly do pay heed the answer is only correct for linear channel models.
The explanation for the answer
, the problem with having 16 phases is maximizing SNR performance and doing a ML detection based on (typically euclidean distance)...
Hi,
The simplest is to use Simulink to generate **broken link removed**. Other options include specific Matlab, Octave code.
Further there are also C++ codes. All depends on your budget and time limitations.
All of them support offline as well as quasi-real-time analysis, so that should not be...
Hi,
The SNR definition there you can look at it as SNR_bit=Eb/N0=(SNR_symbol)*(W/R), where R is your rate and W is the bandwidth.
Now, you for R = Symbol Rate * modulation = (20*W*log2(M)), here W is the normal bandwidth and M is your modulation i.e. M=2 for QPSK.
so we have R=20*W. Then...
To compute the covariance take the sample vector cov(rx) will give the covariance matrix of the signal. The diag(cov(rx)) will provide the variance values for that signal.
Hi,
I presume your considering 2 samples per bit,
firstly you want to ensure your 'd' variable corresponds to two samples per bit. i.e., you want to ensure d(2*i-1) and d(2*i) are the same for a two samples per bit scenario.
At the receiver similarly you will integrate over these two samples...
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