Communication is one of the important aspects of life. Signals were initially sent in the analog domain, are being sent more and more in the digital domain. For better transmission, even single carrier waves are being replaced by multi carriers. Multi carrier systems like CDMA and OFDM are now a day’s being implemented commonly. In the OFDM system, orthogonally placed sub carriers are used to carry the data from the transmitter end to the receiver end. Presence of guard band in this system deals with the problem of ISI. But the large Peak to Average Power Ratio (PAPR) of these signal have some effects on the communication systems. The major drawback of orthogonal frequency-division multiplexing (OFDM) is its high peak-to-average power ratio (PAPR), which gets even more substantial if a transmitter with multiple antennas is considered. To overcome this problem, in this project, the partial transmit sequences (PTS) method well known for PAPR reduction in single antenna systems is studied for multi-antenna OFDM. Finally in this project after reduction of PAPR using PTS algorithm performance is checked on basis of number of errors in signal or by calculating PAPR in signal.