Wide coverage wave beam design method assisted by intelligent reflecting surface

A design method and reflective surface technology, applied in wireless communication, electrical components, network planning, etc., can solve the problems of low flat-top fluctuation and side lobe power, reduced power gain in coverage area, and difficulty in obtaining it, so as to improve the receiving signal-noise Ratio, flexible design method, small power fluctuation effect

Active Publication Date: 2021-07-02
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

On the other hand, when the coverage area is required to be wider and the reflection angle is larger, it is difficult to obtain lower flat top fluctuation and side lobe power only by adjusting the phase of the array pattern; at the same time, the wider beam makes the power dispersed in space, Reduced power gain in coverage area

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  • Wide coverage wave beam design method assisted by intelligent reflecting surface
  • Wide coverage wave beam design method assisted by intelligent reflecting surface
  • Wide coverage wave beam design method assisted by intelligent reflecting surface

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing and concrete implementation example, the present invention will be further described:

[0047] Such as figure 1 In the large-scale multi-antenna mmWave system assisted by smart reflectors shown, there is a configuration N B A base station with a M-dimensional antenna array, an intelligent reflector configured with an M-dimensional array, and multiple users. The known line-of-sight channel between the base station and the smart reflector is: In the formula, φ s is the incident angle between the base station and the smart reflector, e B is the direction diagram of the base station array unit, e S is the direction diagram of the smart reflector array unit, a and b are the normalized array response vectors of the smart reflector and the base station respectively, ( ) H is the conjugate transpose. v(φ) is the normalized array response vector for the pointing angle φ of the smart reflector. As shown in the figure, the sig...

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Abstract

The invention discloses a wide coverage wave beam design method assisted by an intelligent reflecting surface, which is used for enhancing communication coverage of a wireless broadcast channel, and comprises the following steps: firstly, segmenting a target angle range according to a wide coverage communication requirement required by a system, and determining a target wave beam directional diagram for each angle range; according to the target beam directional diagram, obtaining the optimal phase shift of the intelligent reflecting surface by using a conjugate gradient method based on Riemannian manifold; and finally, determining a pre-coding vector of the base station, and adjusting a directional diagram of a reflected beam by setting the phase shift of the intelligent reflecting surface so as to realize a beam scanning function and wide coverage communication. Wide coverage of a wireless broadcast channel is realized by using the intelligent reflecting surface, the designed beam directional diagram has the characteristics of wide beam, small power fluctuation, scannable beam and the like, channel state information of a user is not needed, and reliable wide-coverage communication is provided for a millimeter wave broadcast channel.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a wide-coverage beam design method assisted by an intelligent reflection surface. Background technique [0002] The millimeter wave frequency band has abundant spectrum resources, but the wireless signal attenuation is large in the millimeter wave frequency band, and it is easily blocked. The state of the wireless channel seriously affects the quality of communication services. In traditional wireless communication systems, the wireless channel is not controlled by the user, which becomes an important factor limiting the performance of the communication system. In the new generation of communication system, the intelligent reflector technology can reconstruct the wireless channel and transform the unfavorable wireless environment into favorable conditions, thereby assisting the wireless communication system and improving the reliability of wireless communication. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/22H04W16/28
CPCH04W16/22H04W16/28
Inventor 许威何沐昕赵春明
Owner SOUTHEAST UNIV
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