Performance Analysis of Sign-Based Pre-FFT Synchronization in OFDM Systems

This paper treats the feasibility to use only the sign bit of the in-phase and quadrature components when estimating time and frequency in OFDM systems. Using only the sign bit is shown to result in a frequency dependent bias, which can be easily compensated. The approach is evaluated for LTE and DV...

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Bibliographic Details
Published in2010 IEEE 71st Vehicular Technology Conference pp. 1 - 5
Main Authors Wilhelmsson, Leif, Diaz, Isael, Olsson, Thomas, Öwall, Viktor
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2010
Subjects
Autocorrelation
Digital video broadcasting
Frequency dependence
Frequency estimation
Frequency synchronization
Hardware
OFDM
Performance analysis
Quantization
Wireless LAN
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Summary:This paper treats the feasibility to use only the sign bit of the in-phase and quadrature components when estimating time and frequency in OFDM systems. Using only the sign bit is shown to result in a frequency dependent bias, which can be easily compensated. The approach is evaluated for LTE and DVB-H, when the estimation is performed using the cyclic prefix, and for WLAN 802.11g, when the estimation is done using the short training field (STF). The performance is compared to a floating point implementation, and it is also compared to what is believed to be reasonable requirements for initial time and frequency estimation.
ISBN:1424425182
9781424425181
ISSN:1550-2252
DOI:10.1109/VETECS.2010.5493883