System modeling and analysis of the IEEE 802.15.4 physical layer design

Physical layer structure usually is first considered to design a standard SoC in wireless sensor networks, while few practical works can be referenced. This paper presents detailed functional system modeling which obeys IEEE 802.15.4 protocol and performance analysis of three physical layer bands. Emphatically, the system includes a novel algorithm of de-spreading with minimum hamming distance and an implementation of half-sine pulse shaping filters. According to the simulation results, error control coding like BCH is recommended to use to enhance the data accuracy, and the low complexity filters can effectively improve the system performance. The contribution of this paper is providing valuable reference for the further design on wireless sensor network baseband chips.