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ISA-based hybrid analog/digital beamforming method

A technology of digital beamforming and analog beam, which is applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve the problems of high hardware cost, system performance degradation, and large system power consumption, so as to reduce hardware cost and The effect of small power consumption and performance degradation

Active Publication Date: 2021-06-25
XIDIAN UNIV +1
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Problems solved by technology

However, the shortcomings of this method are that each antenna in the all-digital beamforming method needs to be equipped with a dedicated radio frequency link, which leads to high hardware costs and high system power consumption.
However, the disadvantage of this method is that the system performance will be degraded in the case of a long distance between base station users to transmit base station signals

Method used

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  • ISA-based hybrid analog/digital beamforming method
  • ISA-based hybrid analog/digital beamforming method
  • ISA-based hybrid analog/digital beamforming method

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Embodiment Construction

[0074] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0075] Refer to attached figure 1 , to further describe the steps of the present invention.

[0076] Step 1, input the base station signal.

[0077] Step 2, according to the following formula, calculate the signal received by the user:

[0078] y=(K·C·B·A H ·G+J)·Z·Y·s+K·A·B·C H ·N+M

[0079] Among them, y represents the signal received by the user, which includes the base station signal and the base station signal forwarded by the relay, K represents the channel matrix from the relay to the user, · represents the multiplication operation, C represents the modulus value of each element is 1 The relay transmits analog beamforming matrix, B represents the relay digital beamforming matrix, A represents the relay receiving analog beamforming matrix with the modulus value of each element being 1, H represents the conjugate transpose operation, G represents th...

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Abstract

The invention discloses an analog / digital hybrid beamforming method based on ISA. The steps of the method are: inputting a base station signal, alternately and iteratively solving the analog / digital hybrid beamforming matrix of the user, the relay and the base station, and using the ISA algorithm to alternately iterate Solve the digital beamforming matrix and the analog beamforming matrix to obtain the analog / digital hybrid beamforming matrix at each end, and output the input signal processed by the analog / digital hybrid beamforming matrix at the user, relay and base station. Compared with the beamforming method of the prior art, the present invention has the advantages of low hardware cost, low system power consumption, and large transmission distance. The present invention can be used in millimeter wave communication systems using relay technology, where the antenna array scale is relatively large In this case, optimize the analog / digital hybrid beamforming matrix of the base station, relay and user.

Description

technical field [0001] The present invention belongs to the technical field of communication, and further relates to an analog / digital hybrid beamforming method based on ISA (Iterative Successive Approximation) in the technical field of wireless communication signal processing. The invention can be used in the millimeter wave communication system adopting the relay technology, and optimizes the analog / digital hybrid beamforming matrix of the base station, the relay and the three ends of the user when the scale of the antenna array is large. Background technique [0002] In order to transmit signals in a directional manner, the signal needs to be multiplied by a matrix when it is transmitted, and the user end also needs to be multiplied by a matrix when recovering the signal. The relay is equivalent to the combined device of the user end and the base station, and also has a processing matrix. In hybrid beamforming, both the base station and the user consist of a digital beamf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06
CPCH04B7/0617
Inventor 王勇超方彬薛瑄
Owner XIDIAN UNIV