R&S WinIQSIM2 Software Manual - Rohde & Schwarz

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R&S ® WinIQSIM2 Graphical User Interface Baseband Block 5.10.4 Multi Carrier Waveforms Multi carrier waveforms consisting of up to 512 carriers modulated by user-selectable baseband signals can be created in order to simulate complex multi carrier scenarios with different baseband signals (e.g. CDMA2000 or 3GPP FDD). The carriers are equally spaced and centered toward the RF frequency or baseband DC line, respectively. The carrier spacing is adjustable within the total available baseband bandwidth of 80 MHz. Each carrier can be separately defined in terms of power, phase and modulated input signal. Optionally, crest factor optimization can be applied. Thus, multi carrier waveforms can be very easily configured as broadband test signals and used for such purposes as transmitter or receiver tests. Even complex multi carrier scenarios composed of signals from different digital standards can be created and used for these tests. Example for the creation of a multi carrier waveform file 1. Configure general settings 2. Configure carrier table 3. Enter file name of multi carrier waveform ("Output File") 4. Save and load multi carrier waveform ("Create" or "Create and Load") User Interface To access the "Multi Carrier" dialog, select "Baseband > Multi Carrier...". The menu can be used to create a multi carrier waveform and save it under its own name. As with normal waveforms, the file extension is *.wv. Information on clock rate, number of samples and creation day is displayed in the File menu when a waveform is loaded. The "Multi Carrier" dialog is divided into the following sections. The upper part of the menu is used for calling the default settings and saving and recalling the submenu settings. The General Settings section is used to configure the main multi carrier waveform. Software Manual 1008.0858.42 ─ 10 92
R&S ® WinIQSIM2 Graphical User Interface Baseband Block The buttons in the middle part of the menu open submenus for defining the carrier table. The carrier settings can be checked in the graphical "Carrier Graph" submenu. The "Output Settings" section indicates the name, the size and the clock rate of the multi carrier waveform (after calculation). The buttons in the lower part of the menu activate creation and optionally loading of multi carrier waveform files into the main ARB menu. 5.10.4.1 Default Settings and State The upper part of the dialog is used for calling the default settings and saving and recalling existing ARB multi carrier submenu settings. State Multi Carrier Enables/disables multi carrier generation. Remote command: [:SOURce]:BB:ARBitrary:MCARrier:STATe on page 224 Set to Default Calls default settings. The values are shown in the following table. Parameter Value Number of Carriers 1 Carrier Spacing 0 MHz Software Manual 1008.0858.42 ─ 10 93
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R&S ® WinIQSIM2 Contents Contents
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R&S WinIQSIM2 Software Manual - Rohde & Schwarz

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