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now thereamp;#39;s another way to remove the image instead of filtering and what we do is we notice that if the desired signal is down converted to Omega ifamp;#39; its image is converted to minus Omega I F what we notice here is this signal is down converted here and the image is converted here but as we saw before the problem is that there is an image thatamp;#39;s converted and dumps on top of our signal so weamp;#39;d like to somehow remove this image if we could and last time we talked about doing that with filtering well what if we took an idea similar to the Hartley single sideband remember that where we used a 90 degree phase shift and a sine and cosine down conversion in order to basically generate spectrum that has one part as negative one parts positive and if you sum those up they would cancel whereas the other parts would superpose and give you twice the signal and this is exactly how an image rejection works we look at how the signal images are down converted and what
