BSA-OMP: Beam-Split-Aware Orthogonal Matching Pursuit for THz Channel Estimation
arXiv:2302.02332 · doi:10.1109/LWC.2023.3242699
Abstract
Terahertz (THz)-band has been envisioned for the sixth generation wireless networks thanks to its ultra-wide bandwidth and very narrow beamwidth. Nevertheless, THz-band transmission faces several unique challenges, one of which is beam-split which occurs due to the usage of subcarrier-independent analog beamformers and causes the generated beams at different subcarriers split, and point to different directions. Unlike the prior works dealing with beam-split by employing additional complex hardware components, e.g., time-delayer networks, a beam-split-aware orthogonal matching pursuit (BSA-OMP) approach is introduced to efficiently estimate the THz channel and beamformer design without any additional hardware. Specifically, we design a BSA dictionary comprised of beam-split-corrected steering vectors which inherently include the effect of beam-split so that the proposed BSA-OMP solution automatically yields the beam-split-corrected physical channel directions. Numerical results demonstrate the superior performance of BSA-OMP approach against the existing state-of-the-art techniques.
arXiv commentAccepted Paper in IEEE Wireless Communications Letters
References in corpus (6)
- An Overview of Signal Processing Techniques for Millimeter Wave MIMO Systems
- Spatial- and Frequency-Wideband Effects in Millimeter-Wave Massive MIMO Systems
- Delay-Phase Precoding for Wideband THz Massive MIMO
- Beam Squint and Channel Estimation for Wideband mmWave Massive MIMO-OFDM Systems
- Terahertz-Band Channel and Beam Split Estimation via Array Perturbation Model
- Terahertz-Band Integrated Sensing and Communications: Challenges and Opportunities