Reduction of Peak-to-Average Power Ratio in MIMO-OFDM System Based on the Copy Theory

Although mobile communication technology in our country has experienced a rapid development, surfing the Internet wirelessly supported by the current technology of GPRS and cdma2000 has come true, mobile communication lags behind in our country and still can not meet the peoplepsilas needs that they need the higher data transmission in many multimedia operations. Therefore, many scholars in our country have been trying their best to find a better solution, and their good-willing prospect will come true because of the emergence of the MIMO-OFDM technology. However, MIMO-OFDM, the same as the OFDM system, whose outputs are the accumulation of a number of orthogonal subcarriers, causes higher PAPR and restricts its development and application by this shortcoming. So a new theory is proposed - copy theory based on the traditional method. According to the simulation results, we can see this new technique not only reduces the PAPR of the system, but also saves the extra expenditure and improves frequency spectrum efficiency.