PAPR reduction by data subcarriers and null subcarriers switching

One of OFDM main problem is amount of PAPR (Peak Average Power Ratio). The magnitude of PAPR caused the summation of power by the wave in phase so that maximum power compared to average power becomes high. One method to reduce the amount of PAPR is switching null subcarrier with the data subcarrier. This method has advantages over other methods that do not damage the transmitted signal. BER is not increasing and does not require any side information to restore the signal to its original data. The problem in the switching method is the complexity of the system. In this paper will offered a method based on switching data subcarrier null subcarrier. The new method will provide lower complexity and the PAPR results lower than original OFDM but still higher than switching the data subcarrier null subcarrier method.