Figure 4
From: Out-of-band and adjacent-channel interference reduction by analog nonlinear filters
Average power and peakedness of the receiver I + i Q signal, without and with thermal noise. The transmitted signal is in a 5-MHz band around 2 GHz, the transmit power is 125 mW (21 dBm), and the path/coupling loss is 50 dB. The receiver lowpass filter is an eighth-order Butterworth, with the bandwidth 5 MHz (red lines) and 40 MHz (blue lines). In the upper panels, the thermal noise power is indicated by the horizontal dashed lines, and the width of the shaded bands indicates the receiver noise figure (5 dB).