| Personal mobile communication started from first generation (Based on FDMA),second generation (Based on TDMA) to third generation (Based on CDMA) and fourth generation (CDMA, MIMO, SDMA &OFDM etc) with the rapid development of wireless communication. Smart antenna systems have obtained the widespread attention for its good performance in removing narrowband multiple-access interference. With the development of wireless communications, the requirements on bandwidth become higher and higher, the widebandbeamforming of smart antenna is becoming the next hot spot.Blind source separation (BSS) is refered to the process to restores or withdraws the independent source signal in the satuation that the source signal and transmits are both unknown. In the recent 20 years, BSS has developed to a new research direction, because of the widespread application prospect in domains and so on phonetic image's processing, bio-medical engineering, array signal processing, multiuser correspondence and attracted the numerous research scholars.And because of the radio signal often is the circulation steady signal may construct the blind wave beam former.In this paper, introduced the smart antenna technology, and compared various wideband beamforming techniques in performance.Then analyzed and compared several kind of wide band smart antenna beam forming algorithm. Based on blind signal separation elementary theory knowledge, discuss the using of wide band smart antenna's beam forming in Blind signal separation.At last, on the based of antenna farm wireless signal Extensive direction estimate technology has inferred willfully various sources homogeneous point source array direction guiding vector sum directivity function expression, has laid the foundation for the random array DOA estimate. |
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