Title :
Simplified realization of cascaded adaptive notch filters using complex coefficients
Author :
Nishimura, S. ; Hai-Yun Jiang
Author_Institution :
Dept. of Electron. & Control Syst. Eng., Shimane Univ., Matsue
fDate :
31 May-3 Jun 1998
Abstract :
In this paper, we present a new structure for a 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; digital filters; notch filters; quadrature phase shift keying; IIR notch filter; QPSK communication systems; broad-band signals; cascaded adaptive notch filters; complex coefficients; direct form first-order complex notch filter; gradient-based algorithm; narrow-band interference; Adaptive control; Adaptive filters; Band pass filters; Communication systems; Computer simulation; IIR filters; Interference; Programmable control; Quadrature phase shift keying; Transfer functions;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.694461
