This work presents synchronization architecture based on ZigBee physical layer specifications for health-care systems. It uses preambles for correlation operation to detect the front-end of symbols and then calculate the influence of channel effect, including carrier frequency offset (CFO). By using cross-correlation and auto-correlation architectures as the synchronization of receivers, the data which is influenced by the carrier frequency can be compensated with the CFO compensation structure. This paper uses system simulation for signal compensation of the transmitting and receiving ends, which can detect the CFO bias radian correctly with a detection error less than 10-3, and CFO is therefore compensated. The proposed hardware architecture with high precision is simulated and implemented by TSMC 0.18um CMOS technology. The design gate count and chip area are about 81k and 1.878mm2, respectively.
Relation:
International Journal of Electrical Engineering,V.20,Issue3,P.91-98
