Research On PAPR Reduction Of MIMO-OFDM Systems

Orthogonal Frequency Division Multiplexing (OFDM) disperse High-Speed Data Transmission to many Orthogonal sub-channels by serial to parallel conversion, This technology in the nature of sky-high frequency spectrum utilization and possess Strong fight against multipath fading capability. In this way by a long way improve data transmission rate. Multiple-Input Multiple-Output (MIMO) technology is that make use of many antennas in receiving end and sending end. In this way can by a long way increase fading channel capacity, furthermore in the nature of spatial encoding gain and diversity gain. in addition. with regard to channel fading aspect. There are excellent fight against action to flat fading about Multiple-Input Multiple-Output (MIMO) technology.However with regard to frequency selective fading go a little way, But there are function that transform frequency selective fading into flat fading of Orthogonal Frequency Division Multiplexing(OFDM).MIMO-OFDM Wireless Communication System is incorporate Multiple-Input Multiple-Output (MIMO) with Orthogonal Frequency Division Multiplexing(OFDM). It can improve systems frequency spectrum utilization, increase channel capacity, fight against frequency selective fading and multipath fading.There are serious Peak to Average Power Ratio (PAPR) of MIMO-OFDM systems, This would constraining on the application of MIMO-OFDM systems,The research turn into hot spot in the fields of Communication.In the first place this text Products Description that fundamental principles of Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMO).detailed analysis and summary the specific cause as well as to make an impact to the performance of Wireless Communication System.In the next place that carry out specific illustrate for Orthogonal Frequency Division Multiplexing (OFDM) System and MIMO-OFDM System, and combine the research situation of Peak to Average Power Ratio (PAPR) at home and abroad at the present stage, and classification introduce several kinds method of reduce Peak to Average Power Ratio (PAPR), main improvement and optimization two method about Selected Mapping(SLM) and Partial Transmit Sequences(PTS) of probability technology, make further efforts prove workable of modified technology by simulation experiment.In the last place constitute PTS-Clipping algorithm by organic combination the Clipping algorithm and Partial Transmit Sequences (PTS) algorithm of tradition algorithm,that can reduce Peak to Average Power Ratio (PAPR) effectively by reasonable calculated amount, furthermore overcome regrowth of peak value, at the same time that will not lead in tremendous clipping noise, therefore that the technology have significant for reduce Peak to Average Power Ratio (PAPR) of the future mobile communication.