| 基于OFDM系统的调制解调技术 |
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| 引用本文： | 李振娜.基于OFDM系统的调制解调技术[J].信息技术,2007,31(5):54-57. |
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| 作者姓名： | 李振娜 |
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| 作者单位： | 武汉理工大学信息学院,武汉,430063 |
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| 摘 要： | 介绍了一种在多个相互正交的子载波上并行传输数据的技术——正交频分复用（OFDM：Orthogonal Frequency Division Multiples）技术,主要研究与探讨了基带OFDM调制解调技术的基本原理及其关键技术。讨论了调制解调中的星座映射,然后在计算机上用Matlab软件对OFDM系统中常使用的QAM,QPSK和BPSK调制进行仿真,分别对各个调制方式的误码率性能进行讨论,并给出仿真结果,最后分析了基4按频率抽取的FFT算法及OFDM的FFT实现。
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| 关 键 词： | 调制解调 |
| 文章编号： | 1009-2552（2007）05-0054-04 |
| 修稿时间： | 2006-10-16 |
Modulation and demodulation technology based on OFDM system |
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| LI Zhen-na.Modulation and demodulation technology based on OFDM system[J].Information Technology,2007,31(5):54-57. |
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| Authors: | LI Zhen-na |
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| Affiliation: | Information College, Whuan University of Technology, Wuhan 430063, China |
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| Abstract: | This paper introduces and technology of parallel transmission data in the orthogonal carrier each other orthogonal frequency division multiples, discusses on the main principle based on OFDM modulation and demodulation and its key technology, and the mapping QAM, QPSK and BPSK used in OFDM system oftenly are simulated with MATLAB. The error bit rate for the every modulation is discuesed on. It presents the results, and analyzes FFT algorithm of decimation infrequency and its implementation based on OFDM. |
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| Keywords: | OFDM QPSK |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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