Title :
Cascaded realization of complex adaptive IIR notch filters
Author :
Nishimura, Shotaro ; Jiang, Hai-Yun
Author_Institution :
Dept. of Electron. & Control Syst. Eng., Shimane Univ., Matsue, Japan
Abstract :
In this paper, we present a new structure for complex adaptive IIR notch filter which is useful for the rejection of narrow-band interference from broad-band signals in QPSK communication systems. The proposed structure is based on the direct form first-order complex notch filter using gradient-based algorithm. By using the proposed first-order section, a new cascaded structure for complex adaptive notch filter has been shown. The results of computer simulation are shown which confirm the theoretical prediction
Keywords :
IIR filters; adaptive filters; cascade networks; notch filters; quadrature phase shift keying; QPSK communication systems; broad-band signals; cascaded structure; complex adaptive IIR notch filters; direct form first-order filter; first-order section; gradient-based algorithm; narrow-band interference; Adaptive control; Adaptive filters; Band pass filters; Circuits; IIR filters; Interference; Power generation; Programmable control; Quadrature phase shift keying; Transfer functions;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Conference_Location :
Sacramento, CA
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.662169
