Abstract
Digital predistortion, which is used to compensate for the nonlinearity introduced by power amplifiers, plays an important role in the linearization techniques. Saturation distortions caused by high peak-to-average ratio of input signal, however, cannot be compensated through digital predistortion. As a result, power amplifiers have to operate with back-off and result in relatively low efficiency. In this paper, a new pulse cancellation method of crest factor reduction technique is proposed which can considerably increase power efficiency without power back-off by reducing the high peak-to-average ratio. Simulation results show that using PCM method of CFR prior to DPD can achieve not only a desirable linearization performance, but also a significant increase in power level.
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