| 一种802.11a无线局域网均衡器设计实现 |
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| 引用本文： | 沈伟,臧小刚,唐斌.一种802.11a无线局域网均衡器设计实现[J].计算机仿真,2007,24(7):118-120,167. |
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| 作者姓名： | 沈伟 臧小刚 唐斌 |
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| 作者单位： | 上海交通大学电子工程系,上海,200240 |
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| 摘 要： | 无线通信中,传输信号由于受信道时间选择性衰落和频率选择性衰落的影响容易出现传输失真,因此,通常在接收端通过均衡器进行校正.该文根据无线局域网的特点,结合OFDM技术和长训练序列的特性,提出了一种均衡器结构.系统在Simulink环境下根据802.11a定义进行了算法性能仿真并由FPGA完成硬件电路的开发,结果表明该均衡器结构简单,性能可靠且处理速度快,可作为802.11a无线局域网的一个模块,在实际运用中可获得较好的效果.
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| 关 键 词： | 正交频分复用 符号间干扰 迫零均衡 循环前缀 无线局域网 均衡器 设计实现 Implementation Design Equalizer 效果 实际运用 模块 速度 处理 性能仿真 结构简单 结果 开发 硬件电路 FPGA 算法 环境 Simulink |
| 文章编号： | 1006-9348（2007）07-0118-03 |
| 修稿时间： | 2006-05-032006-06-16 |
Design and Implementation of a 802.11a WLAN Equalizer |
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| SHEN Wei,ZANG Xiao-gang,TANG Bin.Design and Implementation of a 802.11a WLAN Equalizer[J].Computer Simulation,2007,24(7):118-120,167. |
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| Authors: | SHEN Wei ZANG Xiao-gang TANG Bin |
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| Affiliation: | Electronic Engineering Department, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | In wireless communication environment, transmitted signals usually suffer distortions because of the time - selective and the frequency - selective attenuation of channel, then it is necessary to regulate signals using equalizer in the receiver. Considering the characteristics of WLAN, a new equalizer that combines OFDM technology with Longtraining sequence was proposed in this paper. According to 802.1 l a definition, algorithm performance was simulated in Simulink and hardware of the equalizer was also implemented in FPGA development environment. Experimental results show that the equalizer has simple structure, high reliability and processing speed, and the equalizer provides perfect practicability as a module of 802.1 la WLAN. |
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| Keywords: | Orthogonal frequency division multiplexing(OFDM) Inter symbol interference(ISI) Zero forcing equalization Cyclic prefix(CP) |
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