Signal decomposition technique for enhanced power added efficiency of OFDM transmitters and its application for MIMO systems

摘要

The authors have proposed the signal decomposition technique as one of the powerful solution to mitigate the large PAPR to be addressed in OFDM transmitters especially on mobile terminals. In order to enhance the receiver SNR, the simple noise elimination techniques working together with the signal decomposition have also been proposed, that eliminates the noise added on the decomposed constant amplitude on-off-signals by taking advantage of the knowledge of their constant amplitude at the receiver. It is shown that the proposed signal decomposition technique improves the PAPR by 4dB and doubles the PAE at the CCDF (Complementary Cumulative Distribution Function) of 1%. In addition to the analysis of receiver SNR, the BER performances are demonstrated when the decomposed signals are transmitted over a 2×2 MIMO system.