Performance Evaluation of Practical OFDM Systems with Imperfect Synchronization (2012)
Abstract / truncated to 115 words
This work aims to expose the potential performance loss due to synchronization errors in the downlink of the two major cellular standards of OFDM systems, i.e., the WiMAX OFDM physical layer and the LTE. Different to most results in literature, the physical layer coded throughput is utilized as the major performance measure. The influence of an imperfect carrier frequency synchronization or symbol timing is evaluated via analytical modeling and standard compliant link level simulations. In the frequency aspect, a modified differential estimator for the residual frequency offset in WiMAX is proposed. It is shown that the theoretical performance of such an estimator approaches the Cramer-Rao lower bound and provides a significant gain in terms of ... toggle 8 keywordsOFDM – carrier frequency offset – symbol timing offset – performance evaluation – synchronization – throughput loss – LTE – wimax
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