Showing 901 - 920 results of 1,057 for search 'matrix (mathematics)', query time: 0.05s Refine Results
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    Design of beamforming for IRS multi-partition-aided THz multi-subarray by Zufan ZHANG, Rui TANG

    Published 2023-08-01
    “…In the IRS-aided THz communication system, in order to break the channel sparsity limitation on the system spatial multiplexing gain, a hybrid beam forming architecture with wide-spaced multi-subarrays at the transceiver/transmitter side was proposed and the transmission scheme of IRS multi-partition-aided THz multi-subarrays was designed.Firstly, a non-convex objective function with multivariate coupling and non-convex constraints was constructed based on the principle of maximizing spectrum efficiency.Then, the optimization problem was decoupled into two easy-to-solve sub-problems, namely, the reflection coefficient matrix design of IRS and the hybrid beamforming matrix design at the transceiver/receiver.Finally, the Riemannian manifold optimization algorithm was used to calculate the reflection coefficient matrix of IRS, and the closed solution of the hybrid beamforming matrix design at the transceiver/receiver was obtained through mathematical derivation.Simulation results show that compared with the baseline scheme, the proposed scheme can achieve better spectrum efficiency.…”
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    Coupling Empowerment Based Application of Extension Method for Geothermal Potential Assessment by Qing Zhang, Weiya Ge, Fujin Tian, Yunfeng Li, Lili Hou, Lujuan Li, Jianming Li

    Published 2018-01-01
    “…Plenty of mathematics researches provide feasibility to calculate the weights of geothermal controlling factors and have been applied in geothermal potential assessment. …”
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    Research on the order of compression and filtering in the digital signal processing by Yuan Yongsheng Meng Qingsheng

    Published 1998-01-01
    “…In addition, it has a example which help explain such a fact that the value of the expressions have been related to the filtering matrix and noise covariance matrix.…”
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