| 基于OFDM的MIMO-TDCS设计及性能研究 |
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| 引用本文： | 莫建云,任清华.基于OFDM的MIMO-TDCS设计及性能研究[J].电子技术应用,2012,38(11):122-125. |
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| 作者姓名： | 莫建云 任清华 |
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| 作者单位： | 空军工程大学信息与导航学院,陕西西安,710077 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 针对多输入多输出变换域通信系统(MIMO-TDCS)存在频谱利用率低的问题,基于OFDM系统所使用的FFT/IFFT数据调制解调思想,提出了一种在频域上对TDCS符号进行多数据符号加载的系统。理论上系统能够在一个TDCS符号上传输多个数据符号,能有效地提高频带利用率,并且解调过程运用FFT变换可简化解调结构的复杂度。通过仿真分析,验证了在符号传输功率一定并保证一定误码率性能的条件下,基于OFDM的MIMO-TDCS能够有效提高频谱利用率。
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| 关 键 词： | 多输入多输出变换域通信系统 多数据符号加载 频域调制 频谱利用率 |
Research on design and performance of MIMO-TDCS based on OFDM |
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| Mo Jianyun
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Ren Qinghua.Research on design and performance of MIMO-TDCS based on OFDM[J].Application of Electronic Technique,2012,38(11):122-125. |
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| Authors: | Mo Jianyun Ren Qinghua |
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| Affiliation: | (Information and Navigation Institute,Air Force Engineering University,Xi’an 710077,China) |
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| Abstract: | Aiming at the lower spectrum usage at conventional MIMO-TDCS,the paper presents a modulation method of MIMO-TDCS based on OFDM which utilize FFT/IFFT technology to modulate data in spectrum domain.It transmit multiple data symbols by one TDCS symbol and improve spectral efficiency.Because of using demodulation method based on FFT,it make demodulation more briefly.The simulative results show that in fixed transmit symbol power and under proper BER performance limit MIMO-TDCS based on OFDM is a way that can enhance spectral efficiency availably. |
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| Keywords: | MIMO-TDCS multiple data symbols load spectrum modulation spectral efficiency |
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