Upconversion in the digital domain at Transmitter?
时间：04-07
整理：3721RD
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Hi,
I am working on designing a OFDM transmitter. I was wondering whether its necessary to use a mixer in the analog domain to upconvert the baseband signal to passband? Instead, can't we achieve upconversion by multiplying the IFFT output by exp(j*2*pi*fc*t) and then pass the signal through the DAC(my signal ranges from 42-90 KHz, fc = 62KHz, sampling frequency of DAC = 1MHz). This would just leave the low-pass filtering for the analog domain.
Does this make sense?
I am working on designing a OFDM transmitter. I was wondering whether its necessary to use a mixer in the analog domain to upconvert the baseband signal to passband? Instead, can't we achieve upconversion by multiplying the IFFT output by exp(j*2*pi*fc*t) and then pass the signal through the DAC(my signal ranges from 42-90 KHz, fc = 62KHz, sampling frequency of DAC = 1MHz). This would just leave the low-pass filtering for the analog domain.
Does this make sense?
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