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Compensation for Nonlinear Distortion in OFDM Systems Using a Digital Predistorter Based on the SCPWL Model

机译:基于SCPWL模型的数字预失真器对OFDM系统中的非线性失真进行补偿

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Orthogonal frequency division multiplexing (OFDM) is an attractive technique for achieving high-bit-rate wireless data transmission. However, multicarrier systems such as OFDM show great sensitivity to nonlinear distortion. In this paper, we propose a simplicial canonical piecewise-linear (SCPWL) model based digital predistorter to compensate for nonlinear distortion introduced by a high power amplifier (HPA) in OFDM systems. The performance of the new predistortion scheme for OFDM systems is evaluated in terms of bit error rate (BER) and total degradation (TD). The simulation results demonstrated that the proposed predistorter achieves significant performance improvement by effectively compensating for the nonlinear distortion introduced by the HPA.
机译:正交频分复用(OFDM)是实现高比特率无线数据传输的一种有吸引力的技术。但是,诸如OFDM的多载波系统对非线性失真表现出极大的敏感性。在本文中,我们提出了一种基于简单规范分段线性(SCPWL)模型的数字预失真器,以补偿高功率放大器(HPA)在OFDM系统中引入的非线性失真。根据误码率(BER)和总劣化(TD)评估了用于OFDM系统的新预失真方案的性能。仿真结果表明,所提出的预失真器通过有效补偿HPA引入的非线性失真而实现了显着的性能改善。

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