A sign-bit auto-correlation architecture for fractional frequency offset estimation in OFDM
Diaz I, Wilhelmsson L, Rodrigues J, Löfgren J, Olsson T, Öwall V (2010)
Publication Type: Conference contribution
Publication year: 2010
Pages Range: 3765-3768
Conference Proceedings Title: ISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems
Event location: FRA
ISBN: 9781424453085
DOI: 10.1109/ISCAS.2010.5537730
Abstract
This paper presents an architecture of an auto-correlator for Orthogonal Frequency Division Multiplexing systems. The received signal is quantized to only the sign-bit, which dramatically simplifies the frequency offset estimation. Hardware cost is reduced under the assumption that synchronization during acquisition does not have to be very accurate, but sufficient for coarse estimation. The architecture is synthesized towards a 65 nm low-leakage high threshold standard cell CMOS library. The proposed architecture results in area reduction of 93% if compared to typical 8-bit implementation. The area occupied by the architecture is 0.063mm2. The architecture is evaluated for WLAN, LTE and DVB-H. Power simulations for DVB-H transmission shows a power consumption of 4.8μW per symbol. ©2010 IEEE.
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APA:
Diaz, I., Wilhelmsson, L., Rodrigues, J., Löfgren, J., Olsson, T., & Öwall, V. (2010). A sign-bit auto-correlation architecture for fractional frequency offset estimation in OFDM. In ISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems (pp. 3765-3768). FRA.
MLA:
Diaz, Isael, et al. "A sign-bit auto-correlation architecture for fractional frequency offset estimation in OFDM." Proceedings of the 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, ISCAS 2010, FRA 2010. 3765-3768.
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