高速传输非线性系统中数据预失真与基带脉冲整形的联合优化

2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems Pub Date : 2009-11-01 DOI:10.1109/COMCAS.2009.5385965

J. Park, S. Gelfand, M. Fitz

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引用次数: 2

摘要

为了补偿高功率放大器(HPA)的非线性失真和信道噪声，并在不使用频谱包容滤波器的情况下满足输出频谱约束，提出了基带处理的优化方法。采用带记忆的全局补偿数据预失真和平方根提升余弦脉冲整形，并将频谱再生和非线性码间干扰作为HPA平均输出功率回退和脉冲滚降的函数进行评估。然后通过最小化受输出光谱约束的总退化来联合优化这些参数。给出了单载波12/4-QAM在750MHz符号率和标准HPA模型下的结果。

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Joint optimization of data predistortion and baseband pulse shaping in high speed transmission nonlinear systems

The optimization of baseband processing is proposed to compensate for high power amplifier (HPA) nonlinear distortion and channel noise, and to meet an output spectral constraint without the use of a spectral containment filter. Global compensation data predistortion with memory and square root raised cosine pulse shaping are employed, and the spectral regrowth and nonlinear intersymbol interference are evaluated as functions of the average output power back-off of the HPA and the roll-off of the pulse. These parameters are then jointly optimized by minimizing the total degradation subject to the output spectral constraint. Results are given for single carrier 12/4-QAM with 750MHz symbol rate and a standard HPA model.

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来源期刊

2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems

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