|
Bugzilla – Full Text Bug Listing |
| Summary: | Microwave oven model has overlapping subbands | ||
|---|---|---|---|
| Product: | ns-3 | Reporter: | Alexander Krotov <krotov> |
| Component: | spectrum | Assignee: | Nicola Baldo <nicola> |
| Status: | NEW --- | ||
| Severity: | normal | CC: | ns-bugs |
| Priority: | P5 | ||
| Version: | ns-3-dev | ||
| Hardware: | All | ||
| OS: | All | ||
| Attachments: |
Test scenario
Gnuplot script to plot test scenario results Result plot before patch Result plot after patch Proposed patch |
||
Created attachment 2520 [details]
Gnuplot script to plot test scenario results
Script plots PSD in dBm so it can be compared to PSD in the article "Microwave oven signal modeling" referenced in source code.
Created attachment 2521 [details]
Result plot before patch
Created attachment 2522 [details]
Result plot after patch
Created attachment 2523 [details]
Proposed patch
Note that plot has narrower range than plot in the article, but you can compare the value on the center frequency (2.42 Ghz in Fig. 3) or change the model of spectrum analyzer to cover the whole range of frequencies. |
Created attachment 2519 [details] Test scenario MicrowaveOvenSpectrumModel5MhzInitializer and MicrowaveOvenSpectrumModel6MhzInitializer create subbands with distance of 5Mhz and 6MHz respectively. The problem is that they are 10Mhz and 12Mhz wide, while they should be 5Mhz and 6Mhz wide so they don't overlap. This results in 3dB (2 times) difference: each subband contributes its PSD twice. Attached is a scenario (simplified spectrum example with ALOHA etc. removed) that places microwave oven and spectrum analyzer in the same point in space. Plots and patch follow.