ZigBee is one of the latest technologies used in Wireless Personal Area Networks (WPAN). Designing an energy scalable ZigBee System on a Chip (SoC) is a demanding request for low power wireless sensor networks applications. In this paper, we focus on the main hardware module of the physical (PHY) layer of IEEE 802.15.4/ZigBee devices, which is the binary phase shift keying (BPSK) modem for 868 MHz band. We propose a new multiplier-less design for an FPGA-based BPSK modem using VHDL language. A digital signal-processing technique is used in order to generate and detect the BPSK symbols. Although, the BPSK demodulator is designed to match ZigBee PHY layer standard requirements, it can be used for other applications with very simple modifications. The proposed design is validated through the implementation on the AMIRIX AP1000 development platform.
['Haytham Elmiligi', 'M. Watheq El-Kharashi', 'Fayez Gebal']
Design and implementation of BPSK MODEM for IEEE 802.15.4/ZigBee devices