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Additional resources for 2006-0606.IEEE 802.16e WiMAX OFDMA Signal Measurements and Troubleshooting- Agilent

Example text

Note that while all three bursts and pilots are visible in the constellation and Sym/Errs table, no FCH or MAP data is included in the data burst information table. That is because the analyzer is skipping over the first 4 symbols which, according to the zone map, are where the FCH, and the UL and DL MAP data bursts exist. The Manual Measurement Region selection also includes additional capability. For instance, the Pre-demod Waveform and Include extra time in pre-demod traces selections affect the time-domain gating of the signal, but only for pre-demod traces, including Time, Spectrum, and CCDF.

It is also a good idea to configure the analyzer for the same combination of constellation, error vector time, and error vector spectrum displays as used in the previous examples. The analyzer should default to measuring the first zone in the subframe: Zone #0 (the FUSC zone). 55 Advanced Digital Demodulation (continued) For a time-specific measurement relative to symbols in the subframe, it is now only a matter of selecting the Time tab of the OFDMA Demodulation Properties dialog box. From the setup file the analyzer should be configured to select all of the data bursts for analysis.

Simply click anywhere in the burst to highlight it and click the Delete Burst button. When the burst is selected you can verify its name and the type of modulation in the Burst area at the upper right of the display. Click OK and Close, as needed, to return to the display of the OFDMA Demodulation Properties dialog box. Then, from the Selected Zone area of the OFDMA Demodulation Properties dialog box, click Zone #1 to select it for analysis. Advanced Digital Demodulation (continued) Now, select only burst 2 for analysis by clicking Burst #2 in the Data Burst List on the OFDMA Demodulation Properties tab or by clicking anywhere in the graphical representation of burst 2 on the Zone Definition Grid table at the bottom of the dialog box.

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