A radiation method and system of the multi-input and multi-output system

The invention discloses an emission method of multi-input multiple-output system that comprises steps: A. modulated data flow which is to be emitted is transferred into multipath subdata flow via serial-to-parallel conversion; B. said every subdata flow is distributed with a different spread-spectrum code to proceed spread-spectrum operation to obtain multipath spread-spectrum subdata flow; C. every path of multipath spread-spectrum subdata flow is framed and mapped to multiple sending antenna. The invention also provides a MIMO system. The invention integrates the merits and drawbacks of spacing multiplying and spacing diversity, presents a new MIMO system emission scheme-idle bit division multiplex scheme under condition of unchanged MIMO system configuration, the transmission speed of the MIMO system can be guaranteed, but also the stability of the MIMO system can be guaranteed; and the invention is simple, it is fit for CDMA radio communication system which possesses high channel correlation.