Simulating Fading, Adding Noise and Predistortions, and Impairing the Signal
R&S
®
SMW200A
404User Manual 1175.6632.02 ─ 16
●
"Status bar > Frequency = 1.95 GHz" and "Level = -69.9 dBm"
●
"RF State > On"
To configure the AWGN for receiver sensibility tests with predefined SNR of the
receiver
We assume that an AWGN interfering signal with the following characteristics is
required:
The mean power of the interfering signal is -82.5 dBm/BW and C/N = 12.6 dB
1. Select "AWGN" and enable:
● "Mode > Additive Noise"
● "System Bandwidth = 4.5 MHz"
The interfering signal mean power is defined as dBm/BW, where BW is the
system bandwidth. The system bandwidth of the LTE signal is the occupied
bandwidth.
See also Figure 5-2.
● "Min Noise/System Bandwidth Ratio = 1.5"
2. Select "Noise Power/Output Results" and enable:
● "Set Noise Power Via = C/N"
● "Reference Mode = Carrier"
● "Carrier/Noise Ratio = 12.6 dB"
Adding Noise to the Signal
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