At first , the author generally introduce the basal conception and theory , then discuss the existed optimal criterion and adaptive beamforming algorithm . the research of smart antenna at present is usually about theory discussion , and the theory analyzing object is usually linear array antenna , but td - scdma adopt circinal array antenna 該部分先簡要介紹了智能天線的基本概念和原理,包括智能天線的工作原理、分類、主要功能、研究內(nèi)容與發(fā)展動態(tài);然后闡述了目前存在的智能天線最優(yōu)權準則和自適應算法及其存在的問題。