Ternary complementary sets for multiple channel DS-UWB with reduced peak to average power ratio. - Di Wu 019; Predrag Spasojevic; Ivan Seskar (GLOBECOM, 2004)

Orthogonal variable spreading factor codes with zero-correlation zone for TS-UWB. - Di Wu 019; Predrag Spasojevic; Ivan Seskar (WCNC, 2005)

Adaptive rate QS-CDMA UWB systems using ternary OVSF codes with a zero-correlation zone. - Di Wu 019; Predrag Spasojevic (WCNC, 2006)

Complementary Set Matrices Satisfying a Column Correlation Constraint. - Di Wu 019; Predrag Spasojevic (IEEE Trans. Inf. Theory, 2008)