System analysis of a W-CDMA base-station PA employing adaptive digital predistortion
System analysis of a W-CDMA base-station PA employing adaptive digital predistortion
复制标题
采用自适应数字预失真的 W-CDMA 基站 PA 的系统分析
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
C. Potter
中科院分区：
文献类型：
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作者：
C. Potter
分析了采用预失真线性化器的线性功率放大器的实现要求。它示出的W-CDMA包络的统计分布影响PA的线性度要求时，被视为瞬时功率的函数。在给定水平的概率较低的情况下，可接受的非线性度高于最可能的水平。因此，得出了符合ACLR、PCDE和EVM系统要求的最低线性曲线。这可以用来生产更简单、更高效的PA，同时仍符合其规格。
An analysis is presented of the implementation requirements for a linear power amplifier (PA) incorporating a predistortion lineariser. It is shown that the statistical distribution of the W-CDMA envelope affects the linearity requirement of the PA when viewed as a function of instantaneous power. Where there is a low probability of a given level, the acceptable non-linearities are higher than at the most probable level. Consequently, a minimum linearity profile is derived that is consistent with meeting the ACLR, PCDE and EVM system requirements. This can be exploited to produce a simpler and more efficient PA while still meeting its specifications.