| 基于FPGA的高速O-OFDM实时系统发送端信号处理 |
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| 引用本文： | 陈杰,肖江南,陈明,吴限,陈林,严光文.基于FPGA的高速O-OFDM实时系统发送端信号处理[J].光通信技术,2012,36(8):47-49. |
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| 作者姓名： | 陈杰 肖江南 陈明 吴限 陈林 严光文 |
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| 作者单位： | 1. 湖南大学信息科学与工程学院微纳光电器件及应用教育部重点实验室,长沙,410082
2. 北京握奇数据系统有限公司,北京,100102 |
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| 基金项目： | 国家863计划，国家自然科学基金 |
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| 摘 要： | 介绍了基于XI LI NX FPGA的1Gb/s光OFDM(O-OFDM)发送端信号处理的整体设计,对传输信号的星座映射及FFT进行了研究,重点分析了不同量化比特数时IFFT/FFT的误差矢量幅度(EVM),提出了使用不同量化比特对信号进行适当放大而提高系统的IFFT-FFT转换精度的方法。实验验证了OFDM信号I FFT-FFT变换后随量化比特数的增加,EVM值不断减少,相应的星座图更收敛。
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| 关 键 词： | OFDM FPGA 16QAM IFFT/FFT EVM 信号处理 |
The signal processing of transmitter in high-speed real time optical OFDM system based on FPGA |
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| CHEN Jie
,
XIAO Jiang-nan
,
CHEN Ming
,
WU Xian
,
CHEN Lin
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YAN Guang-wen.The signal processing of transmitter in high-speed real time optical OFDM system based on FPGA[J].Optical Communication Technology,2012,36(8):47-49. |
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| Authors: | CHEN Jie XIAO Jiang-nan CHEN Ming WU Xian CHEN Lin YAN Guang-wen |
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| Institution: | 1.Key Laboratory of Nano Optoelectronic Devices of Ministry of Education,School of Information Science and Engineering,Hunan University,Changsha 410082,China;2.Watchdata System Co.Ltd.,Beijing 100102,China) |
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| Abstract: | The letter introduce the integrated design of signal processing in a 1Gb/s optical orthogonal frequency division multiplexing(O-OFDM) transmitter based on XILINX FPGA.The constellation mapping and FFT were deeply investigated in the experiment and raised an IFFT/FFT algorithm with improved operational precision.The experimental results gave the error vector magnitude(EVM) of IFFT/FFT with different quantification bits.And the EVM value of OFDM signal through IFFT-FFT is declining with the quantization of the increase in the number of bits and the related constellation get a better convergence. |
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| Keywords: | OFDM FPGA 16QAM IFFT/FFT EVM signal processing |
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