cindy
Full Member
Posts: 17
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Post by cindy on Dec 12, 2005 0:34:09 GMT -5
In OFDM simulations, should we use the envelope of the channel multipath response to do the convolution in order to get the channel output, or should we use the amplitude+phase of the channel impulse response to do the convolution?
I know people do both sometimes. In which different situations, these two are used respectively?
Thanks in advance.
Cindy
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cindy
Full Member
Posts: 17
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Post by cindy on Dec 13, 2005 3:52:20 GMT -5
The actual channel impulse response should include both the phase and the amplitude, and the channel output changes a lot if only the amplitude is considered. Why some people only use the envelope of the channel impulse response for the simulation?
Please help.
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Post by siaukla on Feb 13, 2006 11:50:55 GMT -5
Hie, I am looking help in these fields too..
I am doing OFDM simulations and the channel impulse respone is as follow :
0.0042 0.0044 0.0048 0.0055 0.0069 0.0100 0.0197 0.0766 0.1556 0.0416 0.0586 0.08890.0199 -0.0055 -0.0201 0.0020 0.0096 0.0141 0.0070 0.0055 0.0049
After I IFFT the data, should I just convolute the values with the channel impulse response to get the output? how should I detect back the signal if my input data is consist of real and imaginary value and it is not 1 and - 1. for example, 0.7071 + 0.7071 j...
Thanks in advance. Please help or give some advice, thanks.
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