  In this letter, we study the impact of nonlinear high power amplifier (HPA)
on simultaneous wireless information and power transfer (SWIPT), for a
point-to-point multiple-input multiple-output communication system. We derive
the rate-energy (RE) region by taking into account the HPA nonlinearities and
its associated memory effects. We show that HPA significantly degrades the
achievable RE region, and a predistortion technique is investigated for
compensation. The performance of the proposed predistortion scheme is evaluated
in terms of RE region enhancement. Numerical results demonstrate that
approximately 24% improvement is obtained for both power-splitting and
time-splitting SWIPT architectures.
