Future wireless systems will need to employ blind estimation to achieve better spectral efficiency. In this letter, we introduce a blind synchronization algorithm for jointly estimating timing and frequency offset in orthogonal frequency division multiplexing (OFDM) systems. The proposed estimator exploits the second-order cyclostationarity of received signals and then uses the symbol-timing and carrier frequency offset information appearing in the cyclic correlation. Because it is a blind estimator, no channel impulse response information is required. Simulations demonstrate that the proposed estimator performs at a sufficiently high level, thus indicating its suitability for use over fading channels.
Bibliographical noteFunding Information:
Manuscript received November 14, 2002; revised February 6, 2003. This work was supported by the Basic Research Program of the Korea Science and Engineering Foundation under Grant R01-2000-000-00271-0(2002). The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Monir Ghogho.
All Science Journal Classification (ASJC) codes
- Signal Processing
- Electrical and Electronic Engineering
- Applied Mathematics