Zhu's girlfriend came here yesterday so I had to go to Zhu Chao's dormitory the last evening. We spend this all day on studying in the classroom. After the supper I come back to my place and i can go on with my projects of communication. I came accross difficulty yesterday, I had tried almost every solution but couldn't get the right results. I decide to struglle to the end.

And I got it in the end. The results are just the right results. I fullfill Creating Analog Source, Sampling, Quantification and Coding. But coming the next difficulty: how to design the LPF? I have no idea now.

Happy new year to every one!