An enhanced linear amplification with non-linear component (ELINC) system

An enhanced linear amplification with non-linear component (ELINC) system has been presented. The ELINC system can achieve both better modulation accuracy and out-of-band spectral performances over a conventional LINC system, without physically adjusting the branches\´ conditions. The gain mismatch between the two amplification branches results in a "dead circle" centered at . The "dead circle" encloses those signal points that cannot be represented by sum or the two branch signals with any possible phase difference. The mismatch also introduces some phase skew to the resulting signal. The ELINC system can remove the phase skew and have higher tolerance to the adverse effects of the "dead circle". Furthermore, if a third branch signal is introduced then any linear modulated signal can be represented without a "dead circle".