摘要
鉴于超宽带(UWB)信道频率选择性衰落和载波抖动对多带正交频分复用UWB(MB-OFDM-UWB)系统性能的影响,提出了利用滤波器组技术实现OFDM系统中快速Fourier变换(FFT)的方案,并对滤波器的实现结构、原型滤波器的算法进行优化,降低了系统实现的复杂性.结果表明,采用线性相位FIR滤波器组的高效实现结构和FIR滤波器的最优等波纹设计法,系统实现复杂性可降低2个数量级左右.
In view of the effect of frequency-selective fading of ultra-wide band and carrier jitter on the performance of the system of multi-band orthogonal frequency-division multiplexing ultra-wide band （MB-OFDM-UWB）, this paper proposes a scheme that uses filter bank to realize fast Fourier transformation （FFT） of the OFDM system. The complexity of the system is reduced by optimizing the structure of the filter and algorithm of the prototype filter. The result shows that the complexity of the system decreases two quantitative stages or so when the efficient structure and optimizing algorithm of linear-phase FIR filter are adopted.
出处
《南通大学学报（自然科学版）》
CAS
2006年第2期75-79,共5页
Journal of Nantong University(Natural Science Edition)
基金
江苏省高校自然科学研究计划资助项目(05KJB510101)
关键词
通信技术
超宽带
快速付氏变换
滤波器组
优化
communication technology
ultra-wide band
FFT
filter bank
optimization
