Doubly-Dispersive Continuous MIMO Systems: Channel Modeling and Beamforming Design
2025/08/31 by Ranasinghe, Kuranage Roche Rayan, Wang, Zhaolin, Rou, Hyeon Seok +2 · 2 citations
#FOS: Electrical engineering #Signal Processing (eess.SP) #electronic engineering #information engineering
paper · doi:10.48550/arxiv.2509.00964
Abstract
We address the modeling and optimal beamforming (BF) design for multiple-input multiple-output (MIMO) continuous aperture array (CAPA) systems operating over doubly-dispersive (DD) channels. First, a comprehensive DD continuous MIMO (DDC MIMO) channel model that incorporates CAPAs at both the transmitter (TX) and receiver (RX) is derived, which is used to obtain explicit input-output (I/O) relations for various waveforms well suited to integrated sensing and communications (ISAC) and robust to DD channels, namely orthogonal frequency division multiplexing (OFDM), orthogonal time frequency space (OTFS), and affine frequency division multiplexing (AFDM). Then, functional optimization problems are formulated for the design of TX and RX BF matrices that maximize received power, in which novel low-complexity, closed-form solutions are obtained via the calculus of variations (CoV) method, yielding expressions closely related to the classical matched filter commonly used in conventional MIMO systems. Simulation results confirm that the proposed TX/RX BF designs with CAPAs provide significant performance and computational complexity gains over conventional MIMO systems in DD channels.
Citations
- Mutual Coupling in Continuous Aperture Arrays: Physical Modeling and Beamforming Design
- Low-Complexity Receiver Design for Multicarrier CAPA-based Systems in Doubly-Dispersive Channels
- Affine Frequency Division Multiplexing (AFDM) for 6G: Properties, Features, and Challenges
- Flexible Intelligent Metasurfaces in High-Mobility MIMO Integrated Sensing and Communications
- A Flexible Design Framework for Integrated Communication and Computing Receivers
- Beamforming Design for Continuous Aperture Array (CAPA)-Based MIMO Systems
- Electromagnetic Channel Modeling and Capacity Analysis for HMIMO Communications
- Doubly-Dispersive MIMO Channels with Stacked Intelligent Metasurfaces: Modeling, Parametrization, and Receiver Design
- Beamforming Optimization for Continuous Aperture Array (CAPA)-based Communications
- Diversity and Multiplexing for Continuous Aperture Array (CAPA)-Based Communications
- Unified Far-Field and Near-Field in Holographic MIMO: A Wavenumber-Domain Perspective
- Enabling 6G Performance in the Upper Mid-Band by Transitioning From Massive to Gigantic MIMO
- Near-Field Localization and Sensing with Large-Aperture Arrays: From Signal Modeling to Processing
- Electromagnetic Information Theory for Holographic MIMO Communications
- Channel Estimation for Holographic MIMO: Wavenumber-Domain Sparsity Inspired Approaches
- From OTFS to DD-ISAC: Integrating Sensing and Communications in the Delay Doppler Domain
- Angular-Distance Based Channel Estimation for Holographic MIMO
- Hybrid Arrays: How Many RF Chains Are Required to Prevent Beam Squint?
- Reconfigurable Holographic Surfaces for Ultra-Massive MIMO in 6G: Practical Design, Optimization and Implementation
- Network-Aided Intelligent Traffic Steering in 6G O-RAN: A Multi-Layer Optimization Framework
- Affine Frequency Division Multiplexing for Next Generation Wireless Communications
- Wavenumber-Division Multiplexing in Line-of-Sight Holographic MIMO Communications
- MIMO-OFDM Joint Radar-Communications: Is ICI Friend or Foe?
- Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How it Works, State of Research, and Road Ahead
- 6G Wireless Communication Systems: Applications, Requirements, Technologies, Challenges, and Research Directions
- Interference Cancellation and Iterative Detection for Orthogonal Time Frequency Space Modulation
- Orthogonal Time Frequency Space Modulation
- Tracking mm-Wave Channel Dynamics: Fast Beam Training Strategies under Mobility
- Hybrid Architectures with Few-Bit ADC Receivers: Achievable Rates and Energy-Rate Tradeoffs
Cited by
Related