MOE-based carrier tracking for multicarrier CDMA systems

Author

Tseng, Shun-Te ; Lehnert, James S.

Author_Institution

Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN

fYear

2008

fDate

16-19 Nov. 2008

Firstpage

1

Lastpage

6

Abstract

A minimum-output-energy-based carrier tracking scheme is proposed for MC-CDMA systems. By utilizing an exponentially weighted empirical correlation whose weights are dictated by an adaptive forgetting factor, the proposed non-data-aided gradient-descent algorithm improves the tracking speed, while maintaining a small steady-state tracking error. Simulation results show that it takes only around 160 iterations to converge in response to an abrupt carrier frequency change of 10% of the intercarrier spacing.

Keywords

code division multiple access; correlation methods; gradient methods; MOE-based carrier tracking; code division multiple access; empirical correlation; iteration method; minimum-output-energy scheme; multicarrier CDMA systems; non-data-aided gradient-descent algorithm; steady-state tracking error; Computer errors; Doppler shift; Frequency estimation; Maintenance engineering; Multiaccess communication; Multicarrier code division multiple access; OFDM modulation; Oscillators; Singular value decomposition; Steady-state;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 2008. MILCOM 2008. IEEE

Conference_Location

San Diego, CA

Print_ISBN

978-1-4244-2676-8

Electronic_ISBN

978-1-4244-2677-5

Type

conf

DOI

10.1109/MILCOM.2008.4753279

Filename

4753279