linear exponential correlation model This class describes a exponential correlation model
$$ \rho_{i,j}=rho + (1-rho)*e^{(-\beta |i-j|)} $$
References:
Damiano Brigo, Fabio Mercurio, Massimo Morini, 2003, Different Covariance Parameterizations of Libor Market Model and Joint Caps/Swaptions Calibration, (http://www.business.uts.edu.au/qfrc/conferences/qmf2001/Brigo_D.pdf)
linear exponential correlation model This class describes a exponential correlation model
$$ \rho_{i,j}=rho + (1-rho)*e^{(-\beta |i-j|)} $$
References:
Damiano Brigo, Fabio Mercurio, Massimo Morini, 2003, Different Covariance Parameterizations of Libor Market Model and Joint Caps/Swaptions Calibration, (http://www.business.uts.edu.au/qfrc/conferences/qmf2001/Brigo_D.pdf)