A signal receiver , comprising a first synthesizer configured to generate a first oscillating output having a first frequency; a first mixer configured to mix its first input with its second input into its output; a first splitter configured to split its input associated with said output of said first mixer into its first output and its second output; a first switch matrix configured to switch its first input associated with said first output of said first splitter into its first output; a second switch matrix configured to switch its first input associated with said second output of said first splitter into its first output; a second synthesizer configured to generate a second oscillating output; a second mixer configured to mix its first input associated with said first output of said first switch matrix with its second input associated with said second oscillating output of said second synthesizer into its output; a third synthesizer configured to generate a third oscillating output; and a third mixer configured to mix its first input associated with said first output of said second switch matrix with its second input associated with said third oscillating output of said third synthesizer into its output, characterised in that said signal receiver further comprises a first frequency multiplier configured to multiply said first oscillating output of said first synthesizer into a fourth oscillating output having a second frequency greater than said first frequency, wherein said second input of said first mixer is associated with said fourth oscillating output of said first frequency multiplier , wherein the signal receiver further comprises a first image rejection filter configured to suppress an image component of its input associated with said output of said second mixer into its output, a second image rejection filter configured to suppress an image component of its input associated with said output of said third mixer into its output, a fourth synthesizer configured to generate a fifth oscillating output, a fourth mixer configured to mix its first input associated with said output of said first image rejection filter with its second input associated with said fifth oscillating output of said fourth synthesizer into its output, a fifth synthesizer configured to generate a sixth oscillating output, a fifth mixer configured to mix its first input associated with said output of said second image rejection filter with its second input associated with said sixth oscillating output of said fifth synthesizer into its output, a first combiner configured to combine its first input associated with said output of said fourth mixer and its second input into its output and a second combiner configured to combine its first input associated with said output of said fifth mixer and its second input into its output, and wherein the signal receiver further comprises an optimization unit configured to compare the frequencies of said second oscillating output of said second synthesizer and said fifth oscillating output of said fourth synthesizer and to generate a comparison result, the optimization unit being further configured to adjust said second oscillating output of said second synthesizer by a frequency shift in a first direction and said fifth oscillating output of said fourth synthesizer by an equal frequency shift in the opposite direction, when a difference of the frequencies of said second oscillating output of said second synthesizer and said fifth oscillating output of said fourth synthesizer is within a specific range such that after adjusting said oscillating outputs said difference is outside said specific range. <EOS>