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• W4224997913 abstract "Summary Terahertz (THz) band communication is extensively used to reach future communication needs for large capacity. Moreover, the multiple input multiple output (MIMO) and Non‐orthogonal multiple access (NOMA) approach with multi‐antenna enable users to share more data with good spectrum efficiency. Due to its various applications, different research works are done in MIMO and NOMA. But the existing approach used in NOMA‐MIMO has a major limitation in power efficiency. Hence, this research work is presented for maximizing power efficiency. The power efficiency is improved effectively using the THz‐NOMA‐MIMO system in the presented approach. Initially, users are clustered effectively by utilizing the enhanced fuzzy c‐means clustering (EFCM) approach. Afterwards, hybrid precoding with threshold orthogonal matching pursuit (TOMP) approach is presented for generating the hybrid precoding vectors. Here, optimal precoding vectors are generated using the geometric distance‐based TOMP approach. This process eliminates the interference present in the data communication, thus improving power and spectral efficiency. Finally, the weight‐based distributed power efficient algorithm (WDPEA) achieves the finest power allocation. These combinations of effective approaches enhance the power and spectral efficiency. The presented methodology is implemented in the working platform of MATLAB. The performance of the presented approach is examined with the different existing approaches in regards to spectral efficiency, energy efficiency, effective capacity, and the mean squared error. When the users are at 20, the sum spectral efficiency of existing zero forcing (ZF) is 21, regularized zero forcing (RZF) is 54, maximum ratio transmission (MRT) is 71, and the proposed method is 77 bit/s/Hz. When the signal to noise ratio at 25 dB, the energy efficiency of existing time division multiple access (TDMA) is 1.24, digital MIMO is 1.21, orthogonal multiple access (OMA) is 1.23, weighted NOMA is 1.35, and the proposed method is 1.38 bit/joule/Hz. The proposed method gets better results when compared to other methods." @default.
• W4224997913 created "2022-04-28" @default.
• W4224997913 creator A5050298828 @default.
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• W4224997913 date "2022-04-27" @default.
• W4224997913 modified "2023-10-16" @default.
• W4224997913 title "An effective combination of terahertz band NOMA and MIMO system for power efficiency enhancement" @default.
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• W4224997913 doi "https://doi.org/10.1002/dac.5187" @default.
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