1. MOE-based carrier tracking for multicarrier CDMA systems
- Author
-
James S. Lehnert and Shun-Te Tseng
- Subjects
Tracking error ,Carrier signal ,Signal-to-noise ratio ,Control theory ,Orthogonal frequency-division multiplexing ,Code division multiple access ,Forgetting factor ,Cdma systems ,Tracking (particle physics) ,Mathematics - 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.
- Published
- 2008
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