摘要
在现代无线通信系统中,功率放大器作为整个系统的必要组成部分,是影响系统性能的关键组件。它的非线性失真不仅会引起带外的频谱扩展,造成邻道干扰,而且会引起带内信号失真,使得系统误码率增大。数字基带预失真技术作为功率放大器线性化的一项关键技术,能够有效提高功放线性化度。针对数字基带预失真系统,研究设计了一种基于嵌入式Linux平台的数字预失真控制系统。在该系统中,利用嵌入式Linux实现了数字基带预失真系统的算法以及对整个系统的控制。该系统的硬件采用基于ARM11架构的嵌入式微处理器S3C6410,软件采用嵌入式操作系统Linux。此系统操作简单,具有良好的移植性、可重用性和扩展性,能够实现预失真算法及对相关模块的控制。
In modern wireless communication system, power amplifiers are the necessary part of the whole system so are key components for the system performance. Its nonlinear distortion will not only cause the extension of out-band spectrum to bring out the interference of adjacent channel, but also cause the distortion of in-band signals to bring out the problem of the increasing BER （bit error rate） of a certain system. As a key technology of the power amplifier linearization, digital baseband predistortion technique improves the degree of power amplifier linearization effectively. Based on digital baseband predistortion system, this paper designs a digital baseband predistortion control system. This system realizes the algorithm and the control of the digital baseband predistortion system using embedded Linux. The hardware of the system uses embedded microprocessor s3c6410 based on ARM11 architecture. This system has a simple operation, good prominent portability, reusabi!ity and scalability. It can complete the task of predistortion algorithm and the control of relevant module.
出处
《实验室研究与探索》
CAS
北大核心
2014年第2期103-107,共5页
Research and Exploration In Laboratory
基金
国家部委预研项目(61072049)
