Title :
A generalized carrier frequency offset estimator for uplink OFDMA
Author :
Nguyen, Huan Cong ; De Carvalho, Elisabeth ; Prasad, Ramjee
Abstract :
This paper proposes a generalized carrier frequency offset (CFO) estimator for the uplink of orthogonal frequency division multiple access (OFDMA) wireless systems. Using the maximum likelihood criterion, the estimator estimates CFOs using the phase shift between two observation windows at distance less than the length of OFDMA symbol. The scheme offers the possibility to shorten the OFDMA preamble used in synchronization, and thus reduce overhead in packet-based wireless communications.
Keywords :
OFDM modulation; frequency division multiple access; generalized carrier frequency offset estimator; maximum likelihood criterion; orthogonal frequency division multiple access wireless systems; packet-based wireless communications; phase shift; uplink OFDMA; Frequency conversion; Frequency domain analysis; Frequency estimation; Frequency synchronization; Interchannel interference; Maximum likelihood estimation; OFDM; Phase estimation; Physical layer; Wireless communication; OFDMA; Synchronization; frequency offset; multiple access; uplink;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on
Conference_Location :
Cannes
Print_ISBN :
978-1-4244-2643-0
Electronic_ISBN :
978-1-4244-2644-7
DOI :
10.1109/PIMRC.2008.4699598
