• 제목/요약/키워드: surface improvement

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BER Performance Analysis of Intelligent Reflecting Surface NOMA for Strongest Channel Gain User

  • Kyuhyuk, Chung
    • International Journal of Internet, Broadcasting and Communication
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    • 제15권4호
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    • pp.84-89
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    • 2023

  • Recently, the sixth generation (6G) networks have become tremendous research topics. Intelligent reflecting surface (IRS) technologies have been envisioned, to increase spectrum and energy efficiency for the fifth generation (5G) mobile networks, towards the sixth generation (6G) communications. In this paper, especially for the strongest channel gain user, we investigate the bit-error rate (BER) of non-orthogonal multiple access (NOMA) systems with intelligent reflecting surface (IRS). First, we derive a BER expression in a closed-form of Q functions. Second, we investigate the BER performance improvement of IRS NOMA systems over NOMA systems versus the power allocation. Moreover, we analyze the BER performance improvement of IRS NOMA systems over NOMA systems versus the number of IRS devices. In results, NOMA equipped with IRS technologies could play an important role in the paradigm shift from 5G mobile networks to 6G mobile networks.

  • https://doi.org/10.7236/IJIBC.2023.15.4.84 인용 PDF

SiO$_2$식각 특성 개선을 위한 E-ICP와 ICP 식각 비교 (Improvement of SiO$_2$Etching Characteristics by E-ICP)

  • 정재성;김진우;라상호;오범환;박세근
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 1999년도 추계종합학술대회 논문집
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    • pp.887-890
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    • 1999

  • The etch characteristics of E-ICP and ICP are compared for the improvement of SiO$_2$ etch Process. Etch rate and etch pattern profile are measured by $\alpha$ -step surface profiler and SEM, respectively. The E-ICP provides improved characteristics on etch rate and surface profile in comparison to ICP process.

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