A Novel TDLMS Algorithm Based on The Fractional Fourier Transform*
LMS adaptive filtering is widely used in smart antenna and space-time signal processing. The Transform Domain LMS (TDLMS) adaptive filtering is a very popular alternative technique to general LMS-type algorithms. As Fourier analysis is one of the most frequently used tools in signal processing, this paper first introduces fractional Fourier transform (FRFT) and part of its properties, and then presents its interpretation as a rotation of the timefrequency plane. The FRFT’s relationships with timefrequency representations have a very simple and natural form and supports LMS adaptive time-frequency filtering in the FRFT domain. The simulation results indicate that the novel method can speed convergence effectively compared to those existing transform domain approaches in literature.
transform domain LMS fractional Fourier transform adaptive filtering
Gang Su Guangxi Zhu
Dept.of Electronics and Information Engineering,Huazhong University of Science and Technology,No.1037,Luoyu Road,Wuhan 430074,P.R.China
国际会议
武汉
英文
2006-09-01（万方平台首次上网日期，不代表论文的发表时间）