Title :
An improved frequency offset estimation algorithm by multi-band averaging method for MB-OFDM based UWB communication for WPAN applications
Author :
Sen, Debarati ; Chakrabarti, Saswat ; Kumar, R. V Raja
Author_Institution :
G.S.S. Sch. of Telecommun., Indian Inst. of Technol., Kharagpur
Abstract :
We present a fast converging scheme for estimating coarse frequency offset (FO) in multi-band orthogonal frequency division multiplexing (MB-OFDM) based ultra-wideband (UWB) systems for wireless personal area network (WPAN). Our estimator performs an averaging of initial estimate over multiple bands and shows an improved estimation of cong3 times in terms of estimation error variance for band group 1 compared to our earlier proposed scheme [3]. Cramer Rao lower bound (CRLB) of estimation error and bit-error rate (BER) performances with our estimator, multi-band averaged frequency synchronizer (MBAFS), is studied and compared with [3] for 100,000 noisy realizations in UWB channel models (CM), CM1 and CM3. Also, computational complexity of MBAFS is analyzed for its usability evaluation.
Keywords :
OFDM modulation; error statistics; frequency estimation; personal area networks; synchronisation; ultra wideband communication; wireless LAN; Cramer Rao lower bound; bit-error rate; estimation error; frequency offset estimation; multi-band averaged frequency synchronizer; multi-band orthogonal frequency division multiplexing; ultra wideband communication; wireless personal area networks; Bit error rate; Computational complexity; Estimation error; Frequency estimation; Frequency synchronization; OFDM; Ultra wideband communication; Ultra wideband technology; Usability; Wireless personal area networks; Frequency offset estimation; MB-OFDM; UWB;
Conference_Titel :
Advanced Networks and Telecommunication Systems, 2008. ANTS '08. 2nd International Symposium on
Conference_Location :
Mumbai
Print_ISBN :
978-1-4244-3600-2
Electronic_ISBN :
978-1-4244-3601-9
DOI :
10.1109/ANTS.2008.4937795
