Rohde & Schwarz R&S SMW200A - Generating Impulsive and Phase Noise; Required Options

Simulating Fading, Adding Noise and Predistortions, and Impairing the Signal
R&S
®
SMW200A
432User Manual 1175.6632.02 ─ 30
To generate a CW interfering signal
For the following example, we assume that two interfering signals are required, a 5
MHz uplink LTE signal and a CW signal. The signals are transmitted at -52 dBm; the
LTE signal at 1.96 GHz and the CW signal 10 MHz below it. Signals with equal (or sim-
ilar) RF levels and at frequencies spaced within the max. RF bandwidth can be gener-
ated by the same path.
To configure the instrument:
1. Enable the required LTE signal:
a) Select "EUTRA/LTE > General Uplink Setting > Channel Bandwidth = 5 MHz"
and "EUTRA/LTE > State = On"
b) Select "Status bar > Frequency = 1.96 GHz" and "Level = -52 dBm"
2. Enable the required interfering signal:
a) Select "AWGN > General > Mode > CW Interferer"
b) Select "Target CW Frequency Offset = 10 MHz"
c) Select "Noise Power/Output Results > Reference Mode = Noise"
d) Select "Interferer Power = -52 dB"
e) Select "AWGN > General > State > On".
3. Select "RF > State > On"
6.3 Generating Impulsive and Phase Noise
Additionally to superimposing an AWGN signal (Additive White Gaussian Noise) with
selectable bandwidth on the generated digital baseband signal, you can also generate
impusive noise and phase noise (R&S SMW-K810).
The R&S SMW-K810 key features
●
Pulsed addition of an AWGN signal to the useful signal with settable number of pul-
ses per frame and within settable limits of randomly distributed pulse intervals.
●
Addition of phase noise with predefined or user settable phase noise characteristic.
6.3.1 Required Options
The basic equipment layout for the enhanced noise generation includes the options:
●
Standard or wideband baseband generator (R&S SMW-B10/-B9)
●
Baseband main module (R&S SMW-B13/-B13T) or wideband baseband main mod-
ule (R&S SMW-B13XT)
●
Option Noise Generator (R&S SMW-K62) per signal path
●
Option Enhanced Noise Generation (R&S SMW-K810), per signal path
●
Frequency option (e.g. R&S SMW-B1003)
For more information, see data sheet.
Generating Impulsive and Phase Noise