Understanding the trade-off in choice of IF There is a trade-off between image rejection and channel selection receiver. So there are two options in selecting the frequency of the local oscillator, or carrier says we have two options in choosing …
As discussed in the section ‘Image problem in the heterodyne receiver’, that image signal’s frequency is quite close to the desired band, but it is outside the band. So to remove the image signal from the desired channel, a filter …
High-side injection: We have a channel, and to do down conversion, this channel is mixed with a local oscillator. There are two options to do this: first, we choose the frequency of the local oscillator (wLO) above the desired channel; …