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hi my friends
when i tried to write a matlab code for a QAM modulation with wavelet transform in the transmiter and reconstruct it in the receiver with idwt it is not done because the output complex numbers of modulation .
can any one help me how i can use wavelet with complex numbers
Re: Fading??
fading divided into two major types
flat fading and frequency selective fading
the first type of fading it is just a kind of attenuation in signal.
but in frequency selective fading the change happens in both amplitude and phase which causes ISI.
Re: Diversity
in wireless communication systems which use multiple antenna we can use the Benefit of the multiple paths from the transmitter to the receiver and combining it in time of frequency to enhance the recieved signal.
Re: Question:FFT in OFDM
u fist convert the serial samples to parallel to form the OFDM symbol then pass them to IFFT, so each sample has its subcarrier
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