Khoirul Anwar Takao Hara Minoru Okada An effective iterative clipping for coded CI/OFDM systems over the nonlinearity of SSPA. 1-5 2008 PIMRC http://dx.doi.org/10.1109/PIMRC.2008.4699570 conf/pimrc/2008 db/conf/pimrc/pimrc2008.html#AnwarHO08