Abstract
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 technique have also been proposed, that eliminates the noise added on the decomposed constant amplitude on-off-signals taking advantage of the knowledge of their constant amplitude at the receiver. In this paper, we discuss the parameter design issue of the proposed techniques and their optimization. Then, demonstrate the PAPR, the PAE and also the BER performances operating on the optimized parameters. It is confirmed that the proposed signal decomposition technique improves the PAPR by 4dB and doubles the PAE at the CCDF (Complementary Cumulative Distribution Function) of 1%. It is also confirmed that the proposed noise elimination technique improves the receiver SNR by 3dB at the BER of 10-3, which is nearly equal to that of conventional OFDM, under the conditions that the decomposed signals are transmitted over the independent AWGN channels. Furthermore, it is demonstrated that the proposed techniques work properly when the decomposed signals are transmitted over 2×2 MIMO.
