研究目的
To propose a P-OMP-IR algorithm for the hybrid precoding problem in millimeter wave (mm-Wave) multiple-input multiple-output (MIMO) systems to improve spectral efficiency and reduce computational complexity.
研究成果
The proposed P-OMP-IR algorithm can approach a steady solution with a few iterations and offers higher spectral efficiencies than existing sparse precoding algorithms.
研究不足
The performance deterioration of the proposed precoding is more severe than the full digital precoder when the number of data streams equals the number of RF chains.
1：Experimental Design and Method Selection:
The hybrid precoding matrix is initialized with the OMP-based sparse hybrid algorithm. The digital precoding matrix and RF precoding matrix are alternatively refined by the OMP method and the dominant singular vectors given by the extended power method.
2：Sample Selection and Data Sources:
The mm-Wave propagation channel is modeled by L = 50 paths which are equally divided into 5 clusters, and each cluster contains 10 rays.
3：List of Experimental Equipment and Materials:
A single-user 144 × 36 mm-Wave MIMO system is considered.
4：Experimental Procedures and Operational Workflow:
The hybrid precoder is refined by using the extended power method, and the updated matrix is used as a new input to the OMP algorithm for the next iteration until a predefined threshold is met.
5：Data Analysis Methods:
The performance is evaluated based on spectral efficiency and residual of the hybrid precoder.
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