论文部分内容阅读
Staggered MultiTone(SMT)is a modulation technique showing significantly reduced Adjacent Channel Leakage Ratio(ACLR)resulting in a more compact Power Spectrum Density(PSD)for the transmitted signal,than the well-known and already widely adopted Orthogonal Frequency Division Multiple Access(OFDMA)scheme.However,the unique spectral properties of an SMT signal could be degraded by a non-linear element(e.g.a Power Amplifier(PA))in the transmitter.Deliberate baseband clipping can be applied to the transmitted signal,reducing the notable high Peak-to-Average Power Ratio(PAPR).The objective of this paper is to give a brief introduction to the SMT scheme,with a special emphasis on deliberate clipping efects and their compensation.The paper introduces two receiver-oriented iterative methods aiming at the restoration of the baseband Bit Error Rate(BER)performance of a non-clipped signal.The methods are evaluated and compared based on numerical simulations.The paper concludes with the selection of a possible candidate for use in systems applying deliberately clipped SMT signals.
Staggered MultiTone (SMT) is a modulation technique showing significantly reduced Adjacent Channel Frequency Ratio (ACLR) resulting in a more compact Power Spectrum Density (PSD) for the transmitted signal, than well-known and already widely adopted Orthogonal Frequency Division Multiple Access OFDMA) the unique spectral properties of an SMT signal could be degraded by a non-linear element (ega Power Amplifier (PA)) in the transmitter. Deliberate baseband clipping can be applied to the transmitted signal, reducing the notable high Peak-to-Average Power Ratio (PAPR). The objective of this paper is to give a brief introduction to the SMT scheme, with a special emphasis on deliberate clipping efects and their compensation. The paper introduces two receiver-oriented iterative methods aiming at the restoration of the baseband Bit Error Rate (BER) performance of a non-clipped signal. The methods are evaluated and compared based on numerical simulations. The paper concludes with the selection o f a possible candidate for use in systems taken deliberately clipped SMT signals.