Title :
Performance analysis of complex adaptive IIR notch filters
Author :
Nishimura, Shotaro ; Hai-Yun Jiang ; Hinamoto, Takao
Author_Institution :
Dept. of Electron. & Control Syst. Eng., Shimane Univ., Matsue, Japan
Abstract :
We present a new structure for complex adaptive IIR notch filters which is useful for the rejection of narrowband interference from broadband signals in QPSK communications systems. The proposed structure is based on a gradient algorithm. A performance analysis for convergence properties is developed. It is shown that the convergence speed does not depend on the variance of input white noise. The effects of colored Gaussian noise on convergence speed are analyzed. The results of computer simulation are shown which confirm the theoretical prediction
Keywords :
Gaussian noise; IIR filters; adaptive filters; convergence of numerical methods; digital communication; digital filters; filtering theory; gradient methods; interference suppression; notch filters; quadrature phase shift keying; IIR notch filters; QPSK; broadband signals; colored Gaussian noise; communications systems; complex adaptive filters; computer simulation; convergence properties; gradient algorithm; narrowband interference rejection; performance analysis; white noise; Adaptive filters; Communication systems; Convergence; Gaussian noise; IIR filters; Interference; Narrowband; Performance analysis; Quadrature phase shift keying; White noise;
Conference_Titel :
Signal Processing Proceedings, 1998. ICSP '98. 1998 Fourth International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-4325-5
DOI :
10.1109/ICOSP.1998.770260
