Title :
A synchronization method for crystal-less OFDM-based wireless body area network applications
Author :
Ma, Hsiao-Han ; Yu, Chien-Ying ; Yu, Jui-Yuan ; Lee, Chen-Yi
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao-Tung Univ., Hsinchu, Taiwan
Abstract :
A synchronization method includes packet detection and frequency error estimation (PAFEE) is proposed for crystalless OFDM-based wireless body area network (WBAN) applications to enlarge the frequency error tolerance between the transmitter and receiver. The packet detection method is designed to overcome the large frequency error. The estimated frequency offset (FO) value is provided to a crystal-less tunable clock source. The evaluation platform is the eCrystal WiBoC OFDM-based system. The system overall frequency error tolerance is extended 140x of existing wireless systems. The system is designed and simulated in a 90 nm technology with 148.5 ¿W computation power and 0.06 mm2 area overhead. Comparing to quartz crystal systems, the overall power reduction is 89.3%, and area reduction is 98.4%.
Keywords :
OFDM modulation; UHF integrated circuits; body area networks; channel estimation; channel spacing; clocks; packet radio networks; synchronisation; system-on-chip; wireless sensor networks; crystal-less OFDM based wireless body area network; crystal-less tunable clock source; eCrystal WiBoC OFDM; frequency 1395 MHz to 1400 MHz; frequency error estimation; frequency error tolerance; frequency offset estimation; packet detection; power 148.5 muW; size 90 nm; synchronization method; Baseband; Body sensor networks; Calibration; Clocks; Downlink; Error analysis; Frequency estimation; Frequency synchronization; Signal processing algorithms; Wireless sensor networks; OFDM; Synchronization; WBAN; crystal-less;
Conference_Titel :
SoC Design Conference (ISOCC), 2009 International
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5034-3
Electronic_ISBN :
978-1-4244-5035-0
DOI :
10.1109/SOCDC.2009.5423909
