Short-range Wireless Communication Technology And To Achieve

Short-range wireless communication technology has attract many people's interests now. Bluetooth is an international standard for it, but it now has a lot of problems. This paper first analyzed Bluetooth's basic theory,architechure,solution. To meet this great market this paper put forward a low-cost and easy solution.This solution uses DSSS technology in wireless transceiver, and works in 2.4GHz ISM band. The author first analyzed spread spectrum technology that is used extensively in short-range wireless communications, and discussed some pseudo noise codes' application in spread spectrum technology. Then it gave wireless transceiver's detailed block diagram in the physical layer. The author also introduced main chip's operating theory which is used in this system. Later Author designed this wireless transceiver and debugged it.In wireless network data link layer is built on the physical layer, and it consists of two part: MAC layer and LLC(logic link control) layer. This paper first analyzed basic functions梕rror control and flow control which are mainly completed in logic link control layer, then discussed several MAC protocols which are often used in wireless network. Later the author introduced MAC protocol's control procedure in this system. A hardware's block diagram in data link layer is given. Since MAC protocol is mainly completed in MCU, author gave a software-realized flow chart.