Convex Quaternion Optimization for Signal Processing: Theory and Applications. - Shuning Sun; Qiankun Diao; Dongpo Xu; Pauline Bourigault; Danilo P. Mandic (IEEE Trans. Signal Process., 2023)

An Iterative Algorithm for Quaternion Eigenvalue Problems in Signal Processing. - Qiankun Diao; Jinlan Liu; Naimin Zhang; Dongpo Xu (IEEE Signal Process. Lett., 2024)

Price's Theorem for Quaternion Variables. - Qiankun Diao; Dongpo Xu; Shuning Sun; Danilo P. Mandic (IEEE Signal Process. Lett., 2024)

Optimizing beamforming in quaternion signal processing using projected gradient descent algorithm. - Qiankun Diao; Dongpo Xu; Shuning Sun; Danilo P. Mandic (Signal Process., 2025)

Cramér-Rao Lower Bounds for Unconstrained and Constrained Quaternion Parameters. - Shuning Sun; Dongpo Xu; Qiankun Diao; Danilo P. Mandic (IEEE Trans. Signal Process., 2025)