Analysis of techniques for peak- to- average power ratio (PAPR) reduction in OFDM-MIMO systems

ABSTRACT OFDM is multicarrier technique which divides the large data stream to small data stream & each stream is associates with single subcarrier. This wireless channel impairment improves bandwidth efficiency & provides high data rate communication. MIMO (multiple input multiple output) communication refers to system where multiple input at transmiter & multiple input at receiver side. Even though there is multiple transmit & receive, there is no interface between the signals. It improves the signal quality & significant capacity gain. Multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) & is combinable used for many advantageous effects like less non linear distortion, decrease receiver’s complexity etc. same way they have some drawbacks & among all the (PAPR) peak to average power ratio is major drawback of MIMO-OFDM system. We had investigate the PAPR reduction techniques, as PAPR is the major drawback and due to which power amplifiers are carefully manufactured to have large input power back offs. We have studied different PAPR reduction techniques their importance and drawbacks.