| Summary: | 碩士 === 國立東華大學 === 電機工程學系 === 102 === Cooperative relay network system in which future mobile communication system plays an important role. The orthogonal frequency division multiplexing technology can provide higher transmission rates and resistance multipath channel fading. However, the carrier frequency offset will cause the orthogonal frequency division multiplexing signals orthogonality damage and reduce system performance. Therefore, this paper will focus on applied orthogonal frequency division multiplexing system relay network with a carrier frequency of the channel estimation error under the offset estimation performance analysis.
We first derive the relay network system known in the carrier frequency offset estimate channel parameters under the Fisher information matrix. Generation will be one of the channel parameters and then replaced by the sum of the channel and the channel estimation error. Through random estimation error model, we can fix the corresponding Fisher information matrix, and then calculate the Cramer-Rao bound.
In addition, we also simulate different parameters through to observe the channel estimation error on the carrier frequency offset estimate the impact. The simulation results can be provided as an important reference for future design relay network system.
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