Cyclic beamforming using fractional Fourier transform domain cyclostationarity  

作　　者：Muhammad Ishtiaq Ahmad Liu Zhiwen Xu Yougen 

机构地区：[1]School of Information ＆ Electronics, Beijing Institute of Technology, Beijing 100081, P. R. China

出　　处：《High Technology Letters》2011年第1期57-63,共7页高技术通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China （ No. 60672084, 60602037, 60736006）.

摘　　要：A minimum mean-squared error （MSE） beamforming algorithm employing the optimum fractional Fourier transform （Opt-FrFT） domain second-order cyclostationarity is proposed. This method can efficiently filter out the compact desired chirp signal, with a consequence that the cyclically uncorrelated interferences and stationary （colored） Gaussian noise are greatly suppressed in the Opt- FrFT domain. This improves the MSE minimization cyclic beamformer by reducing effectively the Opt-FrFY domain signal-noise cross terms in the presence of finite data length de-correlation operation. Simulation results show that the new method works well under a wide range of signal-to-noise ratio （SNR） and signal-to-interference ratio （SIR）.

关 键 词：BEAMFORMING fractional Fourier transform chirp signal CYCLOSTATIONARITY 

分 类 号：TN821.91[电子电信—信息与通信工程] O438[机械工程—光学工程]