## Further improvements » History » Version 11

RIBAS MACHADO, Ederson , 03/22/2015 04:19 PM

 1 2 3 1 SERRA FONT, Anna h1. Further improvements 1 SERRA FONT, Anna 1 SERRA FONT, Anna As we have seen, the link budget equations can become very complex and, during the two months we have had to develop this project, sometimes we have had to do some assumptions in order to simplify the calculus and thus achieve a coherent software tool. 1 SERRA FONT, Anna 1 SERRA FONT, Anna At the beginning of the project we did a long list of all possible options and features that could be included in a link budget tool, selecting them by order of priority in order to implement them. 1 SERRA FONT, Anna 1 SERRA FONT, Anna Finally, in this last part is shown a list of other features and improvements that could be performed for future students. 2 RIBAS MACHADO, Ederson 3 RIBAS MACHADO, Ederson h3. SERVICE 2 RIBAS MACHADO, Ederson 9 RIBAS MACHADO, Ederson - Increase the possibilities of $BER$ and corresponding $\frac{Eb}{No}$ and Code gains. Our possible modulation applied is based in a table of the situation of Quasi-error-Free. As seeing in the figure below, from [1].Quasi-error-free (QEF) means that we will have less than one uncorrected error event per hour, for this table this situations correspond to a PER (Packet error ratio - relative to the symbols) about $10^{-7}$ . 7 RIBAS MACHADO, Ederson 7 RIBAS MACHADO, Ederson 7 RIBAS MACHADO, Ederson p=. !{width: 45%}quasierrortable.png! 1 SERRA FONT, Anna   10 RIBAS MACHADO, Ederson
Figure 1 - Table applied in SatLinkTool, Quasi-error-free situation, from reference [1]. 10 RIBAS MACHADO, Ederson
1 SERRA FONT, Anna 10 RIBAS MACHADO, Ederson 9 RIBAS MACHADO, Ederson We would like to add others situations like the for a situation without FEC, when code rate = 1. We have already start this implementation. In the first steps we'we implemented, for QPSK,BPSK, 8PSK, 16PSK and 32PSK, the graphic of $BER$ x $\frac{Eb}{No}$. One idea, is take the value of $\frac{Eb}{No}$ from a user input of $BER$, and then, perform the calculations. This implementations in labview can be see below. 9 RIBAS MACHADO, Ederson 9 RIBAS MACHADO, Ederson p=. !{width: 80%}improvement.png! 8 RIBAS MACHADO, Ederson   11 RIBAS MACHADO, Ederson
Figure 2 - Possible reference application to further increase of $BER$ possibilities
1 SERRA FONT, Anna 11 RIBAS MACHADO, Ederson To take the  value from a $BER$ input, we can explore matlab functions like solve 9 RIBAS MACHADO, Ederson 2 RIBAS MACHADO, Ederson h3. PAYLOAD 2 RIBAS MACHADO, Ederson 11 RIBAS MACHADO, Ederson We have develloped the first step to calculate the total depointing angle. One further improvements is finalize this implementation. 3 RIBAS MACHADO, Ederson 3 RIBAS MACHADO, Ederson h1. REFERENCES 3 RIBAS MACHADO, Ederson 3 RIBAS MACHADO, Ederson [1]