SPS Webinar: Robust Gridless Estimation of Angles and Delays for Full-Dimensional Wideband mmWave Channels

Date: 15 May 2024
Time: 7:00 AM ET (New York Time)
Presenter(s): Dr. Yuan-Pei Lin

Original article: Download Open Access article
The original article will be made publicly available for download on the day of the webinar for 48 hours.


For many gridless angle estimation methods of mmWave channels, the channel gains need to be time-invariant during training.  This presentation introduces a method that is applicable to both time-invariant and time-varying channels, and robust to channel variations.

This is done by employing time-varying precoders and combiners that are banded block Toeplitz (BBT) matrices.  The advantage of time-varying BBT precoders is two-fold. First, with time-varying BBT precoding we can fabricate time-varying channels.  Thus, the channel can be estimated as if it is a time-varying channel whether the actual channel is time-varying or not.  The presenter will show that, thanks to fabricated time variation in the channel, a small training overhead can be used. Secondly, BBT precoding and combining preserve the shift invariance property of the received data matrix.  Due to the preservation of shift invariance property, we can employ most existing direction-finding methods for estimating the angles and delays, including low complexity gridless subspace-based algorithms.  Simulation results are given to show that the proposed time varying BBT precoding provides robust and accurate channel estimates with low complexity.


Yuan-Pei Lin received the M.S. degree and the Ph.D. degree, both in electrical engineering, from the California Institute of Technology, Pasadena, CA in 1993 and 1997, respectively.

She currently serves as a professor in the Department of Electrical and Control Engineering of National Chiao-Tung University, Taiwan, since 1997. Her research interests include wireless communications and signal processing for digital communications.

Dr. Yuan-Pei Lin served as an associate editor for IEEE Transaction on Signal Processing, IEEE Transaction on Circuits and Systems II, IEEE Signal Processing Letters, IEEE Transaction on Circuits and Systems I, EURASIP Journal on Applied Signal Processing, and Multidimensional Systems and Signal Processing, Academic Press.  She was a Distinguished Lecturer of the IEEE Circuits and Systems Society for 2006-2007.She has also coauthored two books, Signal Processing and Optimization for Transceiver Systems, and Filter Bank Transceivers for OFDM and DMT Systems, both by Cambridge University Press, 2010.