A Frequency Offset Estimation and Compensation Scheme for MB-OFDM UWB Modem

Do-Hoon KIM  Kyu-Min KANG  Chungyong LEE  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.3   pp.1015-1018
Publication Date: 2012/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.1015
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
carrier frequency offset (CFO),  sampling frequency offset (SFO),  MB-OFDM,  UWB,  rotor,  

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We present a carrier and sampling frequency offset estimation and compensation scheme for a multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) modem. We first perform initial carrier frequency offset (CFO) estimation and compensation during the preamble period, and then conduct the estimation and compensation of the residual CFO and sampling frequency offset (SFO) during the payload period. The proposed design scheme reduces the logic gate count of the frequency offset compensation block by about 10%, while it gives almost the same performance at the packet error rate (PER) of 10-4 in the CM1 channel. The frequency offset estimation and compensation block is implemented using 90 nm CMOS technology and tested.