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基于DSP的正交频分复用的实现
引用本文:曾玖贞,王超,王彦. 基于DSP的正交频分复用的实现[J]. 信息安全与通信保密, 2012, 0(7): 84-86
作者姓名:曾玖贞  王超  王彦
作者单位:南华大学电气工程学院,湖南衡阳,421001
摘    要:在理论上推导了采用快速傅里叶逆变换/傅里叶变换(IFFT/FFT)实现正交频分复用(OFDM)调制解调的可行性,分析了采用IFFT/FFT实现OFDM调制解调比传统方法更具优势;然后在数字信号处理器(DSP)硬件平台上对采用IFFT/FFT实现OFDM调制解调进行了验证。实验结果表明:采用IFFT/FFT不仅能正确实现OFDM信号的调制解调,而且还大大简化了OFDM系统结构,降低了系统实现难度,节约了成本。

关 键 词:正交频分复用  数字信号处理器  傅里叶逆变换  傅里叶变换  蝶形运算

Realization of Orthogonal Frequency Division Multiplexing based on DSP
ZENG Jiu-zhen,WANG Chao,WANG Yan. Realization of Orthogonal Frequency Division Multiplexing based on DSP[J]. China Information Security, 2012, 0(7): 84-86
Authors:ZENG Jiu-zhen  WANG Chao  WANG Yan
Affiliation:(Electrical Engineering College, University of South China, Hengyang Hunan 421001, China)
Abstract:The feasibility to realize the OFDM signal modulation and demodulation by using IFFT/FFT is derivated in theory, and compared with the traditional modulation and demodulation method, the application of IFFT/FFT in OFDM modulation and demodulation has more advantages. The experiment for application of IFFT/FFT on the DSP hardware platform is done, and the experimental results show that the application IFFT/FFT method could correctly realize the modulation and demodulation of the OFDM signal while greatly simplify the structure of OFDM system, reduce the system complexity and save the cost.
Keywords:OFDM  DSP  IFFT  FFT  butterfly operation
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