Title :
An analysis of constant modulus receivers
Author :
Zeng, Hanks H. ; Tong, Lang ; Johnson, C. Richard, Jr.
Author_Institution :
AT&T Labs.-Res., Red Bank, NJ, USA
fDate :
11/1/1999 12:00:00 AM
Abstract :
This paper investigates connections between (non-blind) Wiener receivers and blind receivers designed by minimizing the constant modulus (CM) cost. Applicable to both T-spaced and fractionally spaced FIR equalization, the main results include (1) a test for the existence of CM local minima near Wiener receivers; (2) an analytical description of CM receivers in the neighborhood of Wiener receivers; (3) mean square error (MSE) bounds for CM receivers. When the channel matrix is invertible, we also show that the CM receiver is approximately colinear with the Wiener receiver and provide a quantitative measure of the size of neighborhoods that contain the CM receivers and the accuracy of the MSE bounds
Keywords :
FIR filters; Wiener filters; blind equalisers; mean square error methods; minimisation; receivers; MSE bounds; T-spaced FIR equalization; blind receivers; channel matrix; constant modulus receivers; fractionally spaced FIR equalization; mean square error bounds; nonblind Wiener receivers; Additive noise; Blind equalizers; Costs; Finite impulse response filter; Intersymbol interference; Mean square error methods; Performance analysis; Signal analysis; Signal processing algorithms; Testing;
Journal_Title :
Signal Processing, IEEE Transactions on
