Title :
Complementary Channel Estimation and Synchronization for OFDM
Author :
Lowe, Darryn ; Huang, Xiaojing
Author_Institution :
Sch. of Electr., Comput. & Telecommun. Eng., Wollongong Univ., Wollongong, NSW
Abstract :
In this paper, we present a new type of packet preamble for orthogonal frequency division multiplexing (OFDM) systems that is based on a complementary sequence pair. It is shown how this approach permits a receiver to dynamically choose between frequency-domain equalization (FDE) and time-domain equalization (TDE). With FDE offering a low-complexity zero-forcing (ZF) equalization and TDE facilitating easy minimum mean square error (MMSE) estimation, it is concluded that a spectrally-flattened complementary sequence pair offers an outstanding combination of flexibility and performance.
Keywords :
OFDM modulation; channel estimation; equalisers; frequency-domain analysis; least mean squares methods; synchronisation; time-domain analysis; FDE; MMSE; OFDM system; TDE; complementary channel estimation; frequency-domain equalization; minimum mean square error estimation; orthogonal frequency division multiplexing; synchronization; time-domain equalization; Channel estimation; Convolution; Delay estimation; Estimation error; Frequency estimation; Mean square error methods; OFDM; Peak to average power ratio; Quadrature phase shift keying; Smoothing methods;
Conference_Titel :
Wireless Broadband and Ultra Wideband Communications, 2007. AusWireless 2007. The 2nd International Conference on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7695-2842-2
Electronic_ISBN :
978-0-7695-2846-5
DOI :
10.1109/AUSWIRELESS.2007.28
