An antenna
multiplexing system and a method of a
smart antenna and a Multiple-Input Multiple-Output antenna are provided, wherein the
system includes a
MIMO antenna array and a
smart antenna array, the
smart antenna array includes several groups of
antenna array elements in which the distance between neighbor
antenna array elements is less than or equal to one half of
wavelength, and the smart antenna array comprises at least two groups of antenna array elements with the coherence sufficient for the requirement of the
MIMO applications. The method includes: in accordance with the type of the data to be transmitted, determining a transmitting mode and
processing the data to be transmitted accordingly, and in accordance with the transmitting mode, controlling the
MIMO antenna array or smart antenna array, so as to transmitting the data to the mobile terminal. With the premise that the actual coverage of TD-SCDMA
system should be further improved, the requirement of higher user throughout could be met, and the
MIMO antenna system could satisfy the requirement of the future system evolution. Both of the applications of the MIMO and the smart antenna could be met with the use of the same antenna feeding system, and the
adaptive switching of the MIMO and the smart antenna with respect to the user could be achieved.