Spurious-Free Time-to-Digital Conversion in an ADPLL Using Short Dithering Sequences. - Khurram Waheed; Robert Bogdan Staszewski; Fikret Dülger; Mahbuba Sheba Ullah; Socrates D. Vamvakos (IEEE Trans. Circuits Syst. I Regul. Pap., 2011)

Pilot aided direction of arrival estimation for mmWave cellular systems. - Mahbuba Sheba Ullah; Ahmed H. Tewfik (ICASSP, 2016)

Beam Detection Analysis for 5G mmWave Initial Acquisition. - Mahbuba Sheba Ullah; Ahmed H. Tewfik (ITNAC, 2018)

Low Power Pilot Aided Sub-sample Based Channel Estimation for Mmwave Cellular Systems. - Mahbuba Sheba Ullah; Ahmed H. Tewfik (ICASSP, 2019)

Power Scalable Angle of Arrival Estimation Using Pilot Design With Orthogonal Subsequences. - Mahbuba Sheba Ullah; Ahmed H. Tewfik; Robert W. Heath Jr. (IEEE Open J. Commun. Soc., 2021)

Leveraging Waveform Structure to Develop a Power Scalable AoA Estimation. - Mahbuba Sheba Ullah; Ahmed H. Tewfik; Robert W. Heath Jr. (IEEE Open J. Commun. Soc., 2021)