研究目的
To address the challenges of high propagation path loss, inter-symbol interference, and inter-user interference in terahertz (THz) communication by proposing a precoding and detection algorithm for massive MIMO systems using the LSQR algorithm.
研究成果
The proposed MMSE precoding and detection algorithm, combined with the LSQR method, effectively addresses the challenges of THz communication by leveraging channel sparsity and providing satisfactory BER performance. It is robust to CIR estimation errors and applicable to both uniform and hybrid antenna arrays, with potential for use in other high-frequency communications like millimeter wave.
研究不足
The scenario is assumed static, with no movement during data transmission, neglecting Doppler effects. The algorithm requires known channel state information (CSI), which may not be perfectly estimated in reality. The study focuses on indoor environments and may not generalize to dynamic or outdoor scenarios.
1：Experimental Design and Method Selection:
The study uses a simulation-based approach with a ray-launching simulator to generate channel impulse responses (CIRs) for indoor THz scenarios. The algorithm involves MMSE precoding and detection, utilizing block matrices and the LSQR algorithm for efficient computation.
2：Sample Selection and Data Sources:
CIRs are generated for two indoor scenarios with specific geometric features, including AP antennas and user equipment (UE) groups.
3：List of Experimental Equipment and Materials:
Simulation parameters include frequency range (300-310 GHz), antenna array configurations (uniform and hybrid), distances, transmission power, and modulation schemes (OOK, BPSK, QPSK).
4：Experimental Procedures and Operational Workflow:
The simulation involves generating CIRs, applying the precoding and detection algorithms, and evaluating performance metrics like bit error rate (BER).
5：Data Analysis Methods:
Performance is analyzed through BER calculations, robustness to CIR estimation errors, and comparison of different antenna configurations and modulation schemes.
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