Yesterday, I talked about wireless communication theories to my friend during we are going to a short trip. We arrived at a lake. It takes more than one hour to be there after I started driving, which is longer than my expectation.

Here, I would like to replay the same talk about wireless communication theories, which were mentioned to my friend during going to the lake in my car. My friend's major is not the wireless communication area but he understood much better than my expectation. One advantage of my friend to understand my talk is that he has a special characteristic of continuous questioning until he clearly understood what I mentioned. That characteristic may enable him to learn a non-majored area more effectively than general people. He asked a reason whenever he listen a unknown fact. That is, whenever he heard new information during my wireless theories talk, he instantly ask the related question. Frankly speaking, his questions were also helpful to me, resulting in clearing my understanding.

I did not put communications in the end of the titles since recently wireless charging is also one another important issues for wireless technology.

I also ended by numeric number of 3 since wireless is also kept improving time by time. Twitter is now a popular blog platform, which is sometimes called as one of web 3.0 applications.

Wireless Channel ModelEdit

The basic model of communication systems includes a transmitter (Coding) and a receiver where the transmitter transmits information at desired frequency to the receiver and the receiver (Decoding) receives the information from the receiver.

The most basic input signal is consists of {1,0}. When the transmitter send the positive signal, transmit information is denoted as 1 while transmit information is denoted as 0.

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