alberto.fuggetta
Newbie level 3
Hi,
I'm in the system level design stage of a very low IF receiver (VLIF).
Simulating the chain in ADS I get a SSB noise figure that is 3 dB higher than the corresponding Direct Conversion Receiver (DCR).
This is due to the noise at the image frequency. (f_IM = f_RF + 2*f_IF)
I guess I should recover this 3 dB loss somewhere in the receiver chain, otherwise the VLIF architecture would be always disadvantageous.
Does the complex digital mixer do the job?
Thanks a lot,
Alberto
I'm in the system level design stage of a very low IF receiver (VLIF).
Simulating the chain in ADS I get a SSB noise figure that is 3 dB higher than the corresponding Direct Conversion Receiver (DCR).
This is due to the noise at the image frequency. (f_IM = f_RF + 2*f_IF)
I guess I should recover this 3 dB loss somewhere in the receiver chain, otherwise the VLIF architecture would be always disadvantageous.
Does the complex digital mixer do the job?
Thanks a lot,
Alberto