Research On MIMO Multiple-antenna Technology

The third generation mobile communication (3G) technologies are still not applied into our life. However, the new generation wireless communication technologies are emerging and booming, whose target of providing ubiquitous, high quality, and high data rate mobile multimedia transmission sounds much attractive. Of course, the implementation of this unprecedented target is not so easy, and the traditional communication systems using single-antenna transmitting and receiving are confronted with a stiff challenge to achieve this target. The demands of both high capacity and high reliability in the new generation wireless communication systems are not enough to be met even though one of the traditional improved measures, such as the traditional transmit diversity, receive diversity and smart antenna technology, is used. Fortunately, the creative technology, namely Multiple-Input Multiple-Output (MIMO), has provided a novel solution to this problem. MIMO methods make use of multiple-antenna at both the transmit and the receive side of the radio link to multiply the capacity and reliability over more traditional wireless communication systems by fully exploring the space resource within the same frequency band at no additional power expenditure. However, many more problems are emerging and urgently wanted to be solved in MIMO communication systems due to introducing the multiple-antenna comparing with the traditional single-antenna systems.In this paper, the MIMO system model and knowledge related was introduced firstly. We analyzed the capacity of MIMO channel in different cases. Then the Space-Time Coding was introduced, simultaneity we compared with the performance of four detecting arithmetic and analyzed the reliability of system in different antenna station.