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Anti-time-varying beam sequence number modulation method suitable for broadband large-scale millimeter wave system

A modulation method and millimeter wave technology, applied in the modulation carrier system, transmission system, multi-frequency code system, etc., can solve the difficult problems of frequency spectrum efficiency and bit error performance serial number modulation resistance to time-varying Doppler, etc., to achieve good time resistance The effect of changing characteristics and reducing complexity

Active Publication Date: 2020-08-11
PEKING UNIV
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Problems solved by technology

Therefore, it is difficult for existing technologies to significantly improve the ability of sequence number modulation to resist time-varying Doppler without losing spectral efficiency and bit error performance.

Method used

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  • Anti-time-varying beam sequence number modulation method suitable for broadband large-scale millimeter wave system
  • Anti-time-varying beam sequence number modulation method suitable for broadband large-scale millimeter wave system
  • Anti-time-varying beam sequence number modulation method suitable for broadband large-scale millimeter wave system

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Embodiment Construction

[0050] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0051] figure 1 Shown is the flow of the pre-compensation-assisted beam number modulation method provided by the present invention. figure 2 It is a schematic diagram of the application scene of the present invention. The sending and receiving ends of the broadband large-scale millimeter wave system are equipped with N t Dimension N r dimensional lens antenna. Taking the lens antenna at the transmitting end as an example, its function is equivalent to doing N on the input signal t dimensional discrete Fourier transform (DiscreteFourier Transform, DFT). Limited by power consumption and cost, the number of radio frequency chains equipped in the system is much smaller than the dimension of the antenna. exist figure 2 Among t...

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Abstract

The invention discloses an anti-time-varying beam sequence number modulation method suitable for a broadband large-scale millimeter wave system. A pre-compensation auxiliary beam sequence number modulation system is designed and comprises a beam selection module, a transmitting end modulator, a transmitting end pre-compensation module and a receiving end demodulator, wherein the transmitting end and the receiving end of the system are respectively provided with Nt-dimensional and Nr-dimensional lens antennas, and the number of radio frequency chains is far less than the dimension of the antennas, and the radio frequency chain is connected with the antenna through a selection network. The method comprises the steps: determining a sequence number modulated beam set; mapping the serial numbermodulation symbol at the subcarrier into a symbol of quadrature amplitude modulation or phase offset modulation, and performing calculating to obtain a radio frequency link input signal through the serial number modulation symbol; and obtaining a demodulation signal at the subcarrier to realize demodulation of the receiving end. By adopting the technical scheme provided by the invention, the complexity of serial number modulation design can be effectively reduced, the corresponding serial number modulation has good time-varying resistance, and the loss of system error code performance and spectral efficiency is avoided.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a serial number modulation technology of a broadband large-scale millimeter wave system, in particular to a time-varying beam serial number modulation method suitable for a broadband large-scale millimeter wave system, which can be used without losing spectrum efficiency and error In the case of code performance, the ability of serial number modulation to resist time-varying Doppler is significantly improved. Background technique [0002] In recent years, sequence number modulation has attracted extensive attention from academia and industry due to its excellent bit error performance and energy efficiency, and is considered to be an important supplement to the next generation of wireless communication modulation technology. However, under time-varying channels, sequence number modulation faces severe performance degradation, which restricts its application in high-sp...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B7/06H04L27/26
CPCH04B7/0456H04B7/0695H04L27/2628
Inventor 程翔高诗简
Owner PEKING UNIV
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