  This paper presents performance analysis of an adaptive peak cancellation
method to reduce the high peak-toaverage power ratio (PAPR) for OFDM systems,
while keeping the out-of-band (OoB) power leakage as well as an in-band
distortion power below the pre-determined level. In this work, the increase of
adjacent leakage power ratio (ACLR) and error vector magnitude (EVM) are
estimated recursively using the detected peak amplitude. We present analytical
framework for OFDM-based systems with theoretical bit error rate (BER)
representations and detection of optimum peak threshold based on predefined EVM
and ACLR requirements. Moreover, the optimum peak detection threshold is
selected based on the oretical design to maintain the predefined distortion
level. Thus, their degradations are automatically restricted below the
pre-defined levels which correspond to target OoB radiation. We also discuss
the practical design of peak-cancellation (PC) signal with target OoB radiation
and in-band distortion through optimizing the windowing size of the PC signal.
Numerical results show the improvements with respect to both achievable bit
error rate (BER) and PAPR with the PC method in eigen-beam space division
multiplexing (E-SDM) systems under restriction of OoB power radiation. It can
also be seen that the theoretical BER shows good agreements with simulation
results.
