Sub-band-Multiplexed Multi-User Data Communication in mmWave and THz with Analog True Time Delay Arrays

Wideband millimeter-wave (mmWave) and terahertz (THz) systems can facilitate simultaneous data communication with multiple spatially separated users. It is desirable to orthogonalize users across sub-bands by deploying frequency-dependent beams with a sub-band-specific spatial response. True-Time-Delay (TTD) antenna arrays are a promising wideband architecture to implement sub-band-specific dispersion of beams across space using a single radio frequency (RF) chain. This project explores the structured and unstructured design of analog TTD array-based codebooks to generate beams
that exhibit quantized sub-band-to-angle mapping. Our focus is on developing low-complexity design methods for sub-band-beam design that do not require optimization.


  • PI: Danijela Cabric
  • Students: Aditya Wadaskar, Ibrahim Pehlivan, Ding Zhao

Structured Staircase TTD Codebook Design


D. Zhao, I. Pehlivan, A. Wadaskar and D. Cabric, “Fast Frequency-Direction Mapping Design for Data Communication With True-Time-Delay Array Architecture, ” 2024 International Conference on Computing, Networking and Communications: Signal Processing for Communications (ICNC’24 SPC)
Structured Two-Stage True-Time-Delay Array Codebook Design for Multi-User Data CommunicationCode book Design for Multi - User Data Communication," GLOBECOM 2023 - 2023 IEEE Global Communications Conference, Kuala Lumpur, Malaysia, 2023, pp. 3378-3384, doi: 10.1109/GLOBECOM54140.2023.10437220.