Title :
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
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;
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
DOI :
10.1109/MILCOM.2008.4753279
