Title :
On various low-hardware-complexity LMS algorithms for adaptive I/Q correction in quadrature receivers
Author :
Çetin, Ediz ; Kale, Izzet ; Morling, Richard C S
Author_Institution :
Dept. of Electron. Syst., Univ. of Westminster, London, UK
Abstract :
In this paper, the performance and convergence time comparisons of various low-complexity LMS algorithms used for the coefficient update of adaptive I/Q correctors for quadrature receivers are presented. We choose the optimum LMS algorithm suitable for low complexity, high performance and high order QAM and PSK constellations. What is more, the influence of the finite bit precision on VLSI implementation of such algorithms is explored through extensive simulations and the optimum wordlengths established.
Keywords :
VLSI; computational complexity; least mean squares methods; quadrature amplitude modulation; quadrature phase shift keying; radio receivers; PSK; QAM; VLSI implementation; adaptive I/Q corrector; convergence time; finite bit precision; low hardware complexity LMS algorithm; optimum wordlength; quadrature receivers; Algorithm design and analysis; Baseband; Convergence; Digital signal processing; Least squares approximation; Performance analysis; Phase shift keying; Quadrature amplitude modulation; Signal processing algorithms; Very large scale integration;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329040
