Experimental studies on an OFDM carrier frequency offset estimator

In OFDM carrier frequency offset must be estimated and compensated at the receiver to maintain orthogonality. OFDM carrier frequency synchronization performance can be improved by using diversity. In this paper, we examine the sensitivity of the carrier frequency estimator against key system parameters in a practical implementation using real data obtained on the Stevens wireless testbed. The experimental setup is comprised of wideband 65 Msamples/second digital to analog converter, radio frequency (RF) transmitter, which transmits at 2.4 GHz frequency with 12 MHz bandwidth and RF receiver chains whose outputs are sampled at 65 Msamples/sec.