Research on the joint suppression algorithm of PAPR and OOB radiation in OFDM systems
Orthogonal frequency division multiplexing(OFDM)technology has the advantages of high spectral efficiency and strong resistance to multipath fading,but it has inherent disadvantages of peaking average power ratio(PAPR)and high out-of-band(OOB)radiation.Some PAPR suppression algorithms can lead to increased OOB radiation,so an algorithm that jointly inhibits PAPR and OOB radiation in OFDM systems is needed.In this paper,a new hy-brid PAPR and OOB radiation suppression algorithm combining linear compression and simplified clipping filter is proposed.The algorithm adopts continuous piecewise linear compression(CPLC)algorithm to suppress signal PA-PR,and filters the signal after compression in the frequency domain,and then adopts the simplified clipping filter(SCF)algorithm to reduce the peak regeneration caused by frequency domain filtering.At the same time,the OOB radiation of the signal is not increased.The iterative receiving algorithm is used to improve the bit error rate per-formance of the system.The simulation results show that compared with CPLC and SCF schemes,the proposed al-gorithm can achieve better combined suppression performance of PAPR and OOB radiation,and the bit error rate(BER)performance is similar to the original signal through the iterative receiving algorithm.
orthogonal frequency division multiplexing(OFDM)peak average power ratio(PAPR)out-of-band(OOB)radiationlinear compression and expansionclipping and filtering(CF)
万方数据
维普
