这是ieee 802.15.4标准，也是大名鼎鼎的zigbee mac和phy部分。-802.15.4 standard, as well as the famous zigbee mac and phy part.

CC2420是Chipcon公司推出的首款符合2.4GHz IEEE 802.15.4标准的射频收发器（RF transiver）。它只需要极少外部元件，其选择性和敏感性指标超过了IEEE 802.15.4的要求，可确保短距离通信的有效性和可靠性。并且支持最高达250kpps的数据传输速率，可实现多点对多点的快速组网。-Chipcon CC2420 is the company's first with 2.4GHz IEEE 802 .15.4 standard RF transcei

the simulation model implements the physical layer of the IEEE 802.15.4 standard running at 2.4 GHz Frequency band with 250 kbps data rate.The MAC layer supports the beacon-enabled mode and implements slotted CSMA/CA and GTS mechanism according to th