| Summary: | 碩士 === 國立臺灣大學 === 電信工程學研究所 === 90 === Adaptive beamforming technique is used to design a spatial filter, which suppressed the signal of non-interest and background noise, and receives the signal of interest. In the thesis, when coherent source is presented, we proposed a method of SS+TAM+Der scheme to solve the coherent situation.
In recent years, the family of Self COherent REstoral(SCORE) algorithm proposed by Gardner has been shown be blindly extract cyclostationary signals. However, the algorithm fails in the multipath fading. Therefore, we developed an algorithm to extract signals by using the backward technique. Go ahead, we to observe a phenomenon when the cycle frequency is error and presented a robust method for adaptive beamforming.
Final, we also developed a robust method under random cycle frequency error and coherent situation.
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