随着6G的快速发展,天地一体化信息网络成为实现全球无缝覆盖的关键。围绕6G天地一体化网络中的调制技术展开专利分析,重点研究了基于循环前缀(Cyclic Prefix,CP)/离散傅里叶变换(Discrete Fourier Transform,DFT)扩展的正交频分复用(Ort...随着6G的快速发展,天地一体化信息网络成为实现全球无缝覆盖的关键。围绕6G天地一体化网络中的调制技术展开专利分析,重点研究了基于循环前缀(Cyclic Prefix,CP)/离散傅里叶变换(Discrete Fourier Transform,DFT)扩展的正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)、基于滤波器组/多带滤波的OFDM、正交啁啾分复用(Orthogonal Chirp Division Multiplexing,OCDM)、正交时频空间(Orthogonal Time Frequency and Space,OTFS)和仿射频分复用(Affine Frequency Division Multiplexing,AFDM)这5种调制技术的专利申请趋势、技术热点及竞争格局。研究结果表明,2020年后6G调制技术专利申请量激增,中国在专利数量上占据主导地位,AFDM因其在高动态信道中的优异性能成为未来6G标准的有力候选。揭示了专利领域的技术空白,为后续研发和专利布局提供了战略参考。展开更多
A hybrid optical switch （HOS） with physical layer of wavelength division multiplexing and optical code division multiplexing （WDM/OCDM） scheme is proposed. An additional feature to the HOS than optical cross conne...A hybrid optical switch （HOS） with physical layer of wavelength division multiplexing and optical code division multiplexing （WDM/OCDM） scheme is proposed. An additional feature to the HOS than optical cross connect （OXC） is that the controller can process requests for both circuit establishment and burst scheduling. In our study, the measurement criteria of HOS are the blocking probability, probability of error, and probability of outage. To simplify the analysis, no distinction is made between a circuit in progress and a burst in progress. Moreover, a minimum fit （MinF） resource allocation strategy is applied in order to increase the bandwidth efficiency and control the multiplexing interference of the OCDM. A 2D Markov model for the HOS is presented using the MinF strategy. Numerical results reveal that the code parameters and the resource allocation strategy greatly affect the performance. Certain periority can be achieved by assigning shorter codes to high periority users and longer codes to low periority users. Also, the probability of error and outage are reduced bv aonling the MinF strategy.展开更多
文摘随着6G的快速发展,天地一体化信息网络成为实现全球无缝覆盖的关键。围绕6G天地一体化网络中的调制技术展开专利分析,重点研究了基于循环前缀(Cyclic Prefix,CP)/离散傅里叶变换(Discrete Fourier Transform,DFT)扩展的正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)、基于滤波器组/多带滤波的OFDM、正交啁啾分复用(Orthogonal Chirp Division Multiplexing,OCDM)、正交时频空间(Orthogonal Time Frequency and Space,OTFS)和仿射频分复用(Affine Frequency Division Multiplexing,AFDM)这5种调制技术的专利申请趋势、技术热点及竞争格局。研究结果表明,2020年后6G调制技术专利申请量激增,中国在专利数量上占据主导地位,AFDM因其在高动态信道中的优异性能成为未来6G标准的有力候选。揭示了专利领域的技术空白,为后续研发和专利布局提供了战略参考。
文摘A hybrid optical switch （HOS） with physical layer of wavelength division multiplexing and optical code division multiplexing （WDM/OCDM） scheme is proposed. An additional feature to the HOS than optical cross connect （OXC） is that the controller can process requests for both circuit establishment and burst scheduling. In our study, the measurement criteria of HOS are the blocking probability, probability of error, and probability of outage. To simplify the analysis, no distinction is made between a circuit in progress and a burst in progress. Moreover, a minimum fit （MinF） resource allocation strategy is applied in order to increase the bandwidth efficiency and control the multiplexing interference of the OCDM. A 2D Markov model for the HOS is presented using the MinF strategy. Numerical results reveal that the code parameters and the resource allocation strategy greatly affect the performance. Certain periority can be achieved by assigning shorter codes to high periority users and longer codes to low periority users. Also, the probability of error and outage are reduced bv aonling the MinF strategy.
