A sign-bit auto-correlation architecture for fractional frequency offset estimation in OFDM
Author
Summary, in English
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 65nm 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 0.063mm^2. The architecture is evaluated for WLAN, LTE and DVB-H. Power simulations for DVB-H transmission shows a power consumption of 4.8uW per symbol.
Department/s
Publishing year
2010
Language
English
Pages
3765-3768
Document type
Conference paper
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- frequency offset
- DVB-H
- WLAN
- Sign-Bit
- OFDM
- LTE
Conference name
IEEE International Symposium on Circuits and Systems (ISCAS), 2010
Conference date
2010-05-30 - 2010-06-02
Conference place
Paris, France
Status
Published
Project
- Radiosystem: Multibase (EU, VÖ/OE)
Research group
- Elektronikkonstruktion
- Digital ASIC