The widely linear quaternion recursive least squares filter. - Cyrus Jahanchahi; Clive Cheong Took; Danilo P. Mandic (CIP, 2010)

On HR calculus, quaternion valued stochastic gradient, and adaptive three dimensional wind forecasting. - Cyrus Jahanchahi; Clive Cheong Took; Danilo P. Mandic (IJCNN, 2010)

A unifying framework for the analysis of quaternion valued adaptive filters. - Clive Cheong Took; Cyrus Jahanchahi; Danilo P. Mandic (ACSCC, 2011)

Blind extraction of improper quaternion sources. - Soroush Javidi; Clive Cheong Took; Cyrus Jahanchahi; Nicolas Le Bihan; Danilo P. Mandic (ICASSP, 2011)

A Quaternion Gradient Operator and Its Applications. - Danilo P. Mandic; Cyrus Jahanchahi; Clive Cheong Took (IEEE Signal Process. Lett., 2011)

On gradient calculation in quaternion adaptive filtering. - Cyrus Jahanchahi; Clive Cheong Took; Danilo P. Mandic (ICASSP, 2012)

Kalman filtering for widely linear complex and quaternion valued bearings only tracking. - Dahir H. Dini; Cyrus Jahanchahi; Danilo P. Mandic (IET Signal Process., 2012)

An adaptive diffusion quaternion LMS algorithm for distributed networks of 3D and 4D vector sensors. - Cyrus Jahanchahi; Danilo P. Mandic (EUSIPCO, 2013)

A class of quaternion valued affine projection algorithms. - Cyrus Jahanchahi; Clive Cheong Took; Danilo P. Mandic (Signal Process., 2013)

A theoretical bound for the performance advantage of quaternion widely linear estimation. - Cyrus Jahanchahi; Sithan Kanna; Danilo P. Mandic (DSP, 2014)

The HC calculus, quaternion derivatives and caylay-hamilton form of quaternion adaptive filters and learning systems. - Yili Xia; Cyrus Jahanchahi; Dongpo Xu; Danilo P. Mandic (IJCNN, 2014)

Complex dual channel estimation: Cost effective widely linear adaptive filtering. - Cyrus Jahanchahi; Sithan Kanna; Danilo P. Mandic (Signal Process., 2014)

A Class of Quaternion Kalman Filters. - Cyrus Jahanchahi; Danilo P. Mandic (IEEE Trans. Neural Networks Learn. Syst., 2014)

Adaptive Convex Combination Approach for the Identification of Improper Quaternion Processes. - Bukhari Che Ujang; Cyrus Jahanchahi; Clive Cheong Took; Danilo P. Mandic (IEEE Trans. Neural Networks Learn. Syst., 2014)

Quaternion-Valued Echo State Networks. - Yili Xia; Cyrus Jahanchahi; Danilo P. Mandic (IEEE Trans. Neural Networks Learn. Syst., 2015)

Performance Bounds of Quaternion Estimators. - Yili Xia; Cyrus Jahanchahi; Tohru Nitta; Danilo P. Mandic (IEEE Trans. Neural Networks Learn. Syst., 2015)