Jan 5, 2012 #1 M makanaky Advanced Member level 4 Joined Feb 1, 2007 Messages 104 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,296 Activity points 1,944 Hi, I have a question about OFDM : Does OFDM change the bandwidth , spectral efficiency and BER ? For Example : Does QPSK OFDM have same bandwidth , spectral efficiency and BER as QPSK or does it differ ? Thanks
Hi, I have a question about OFDM : Does OFDM change the bandwidth , spectral efficiency and BER ? For Example : Does QPSK OFDM have same bandwidth , spectral efficiency and BER as QPSK or does it differ ? Thanks
Jan 6, 2012 #2 Ahmed Alaa Full Member level 5 Joined Jul 22, 2009 Messages 317 Helped 61 Reputation 136 Reaction score 44 Trophy points 1,318 Location Egypt Activity points 2,965 Re: questionn about OFDM Bandwidth is reduced due to overlapping spectra of different subcarriers in frequency domain. Regarding BER, in AWGN, you'll find that the BER is nearly the same but in fading channels, it depends on the equalization technique you're using.
Re: questionn about OFDM Bandwidth is reduced due to overlapping spectra of different subcarriers in frequency domain. Regarding BER, in AWGN, you'll find that the BER is nearly the same but in fading channels, it depends on the equalization technique you're using.