Simulations and results » History » Version 9
GAY, Adrien, 03/23/2015 11:09 AM
| 1 | 1 | GAY, Adrien | h1. Simulations and results |
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| 4 | 1 | GAY, Adrien | From the method described previously, we have developed three Matlab programs enabling to compute or visualize the influence of various parameters according to what is assume known or not. |
| 5 | 1 | GAY, Adrien | |
| 6 | 1 | GAY, Adrien | h2. Computation of the MODCOD and (G/T) required: |
| 7 | 1 | GAY, Adrien | |
| 8 | 8 | GAY, Adrien | Supposing that the specifications and frequency band are known (_Rb, R, f, B_ and _EIRP_ are known), we directly get all the parameters for the system design by following the method described previously. |
| 9 | 1 | GAY, Adrien | |
| 10 | 8 | GAY, Adrien | +f= 869,5 MHz B= 250 kHz PAR= 0.5 W Rb=500 bits/s R=50 km:+ |
| 11 | 1 | GAY, Adrien | |
| 12 | 9 | GAY, Adrien | p=. !850M-MODCOD-GoT.png! |
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| 15 | 1 | GAY, Adrien | Comment value (G/T) |
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| 17 | 3 | GAY, Adrien | +f= 5 GHz B= 500 kHz EIRP= 1 W Rb=500 bits/s R=50 km:+ |
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| 19 | 1 | GAY, Adrien | |
| 20 | 9 | GAY, Adrien | p=. !5G-MODCOD-GoT.png! |
| 21 | 1 | GAY, Adrien | |
| 22 | 1 | GAY, Adrien | Comment value (G/T) |
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| 24 | 1 | GAY, Adrien | |
| 25 | 1 | GAY, Adrien | |
| 26 | 1 | GAY, Adrien | h2. Influence of the bandwidth on the EIRP: |
| 27 | 1 | GAY, Adrien | |
| 28 | 1 | GAY, Adrien | If the regulatory frequency for application is known, this tool enables to visualize the tradeoff between the EIRP and bandwidth to fulfil the specifications: |
| 29 | 1 | GAY, Adrien | |
| 30 | 3 | GAY, Adrien | +f= 869,5 MHz Rb=500 bits/s R=50 km:+ |
| 31 | 1 | GAY, Adrien | |
| 32 | 9 | GAY, Adrien | p=. !850M-BW_vs_EIRP.png! |
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| 34 | 1 | GAY, Adrien | |
| 35 | 1 | GAY, Adrien | Comments |
| 36 | 1 | GAY, Adrien | |
| 37 | 3 | GAY, Adrien | +f= 5 GHz Rb=500 bits/s R=50 km:+ |
| 38 | 1 | GAY, Adrien | |
| 39 | 9 | GAY, Adrien | p=. !5G-BW_vs_EIRP.png! |
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| 41 | 1 | GAY, Adrien | |
| 42 | 9 | GAY, Adrien | |
| 43 | 1 | GAY, Adrien | Comments |
| 44 | 1 | GAY, Adrien | |
| 45 | 1 | GAY, Adrien | |
| 46 | 1 | GAY, Adrien | |
| 47 | 1 | GAY, Adrien | h2. Influence of the distance on the bite rate: |
| 48 | 1 | GAY, Adrien | |
| 49 | 1 | GAY, Adrien | If the required system design is too constraining for a given specification, and then not achievable, we might lower our expectations and have a tradeoff between the desired bit rate and the range |
| 50 | 1 | GAY, Adrien | |
| 51 | 3 | GAY, Adrien | +f= 869,5 MHz B= 250 kHz PAR= 0.5 W+ |
| 52 | 1 | GAY, Adrien | |
| 53 | 1 | GAY, Adrien | |
| 54 | 9 | GAY, Adrien | p=. !850M-range_vs_Bit_rate.png! |
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| 56 | 1 | GAY, Adrien | |
| 57 | 3 | GAY, Adrien | +f= 5 GHz B= 500kHz EIRP= 1 W+ |
| 58 | 1 | GAY, Adrien | |
| 59 | 1 | GAY, Adrien | |
| 60 | 9 | GAY, Adrien | p=. !5G-range_vs_Bit_rate.png! |
| 61 | 1 | GAY, Adrien | |
| 62 | 1 | GAY, Adrien | |
| 63 | 1 | GAY, Adrien | We can notice the bite rate is dropping quickly with the range of transmission. Then, the video transmission can be lost if the aircraft moves just a little bit too far of the limit range. |