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Hybrid beam forming method based on maximized minimum phase difference

A hybrid beam and minimum phase technology, applied in space transmit diversity, radio transmission system, network planning, etc., can solve the problems of reducing interference and not taking into account the receiving power, so as to improve system capacity, reduce interference, and improve transmission efficiency Effect

Active Publication Date: 2019-01-01
东营正诺技术服务有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a hybrid beamforming method based on maximizing the minimum phase difference to solve the problem that the existing hybrid beamforming method cannot take into account the received power and reduce interference

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  • Hybrid beam forming method based on maximized minimum phase difference
  • Hybrid beam forming method based on maximized minimum phase difference
  • Hybrid beam forming method based on maximized minimum phase difference

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The hybrid beamforming method based on maximizing the minimum phase difference in the millimeter-wave large-scale MIMO multi-user system, the application scenarios are as follows:

[0028] In a single cell, K single-antenna users send data to the base station at the same time. The base station is equipped with M antennas and K radio frequency links for receiving signals, and the array is a uniform linear array.

[0029] The sending signal vector is s∈C K×1 , the signal received by the base station is processed by the hybrid beamforming matrix, that is, W RF ∈ C M×K , and W RF ∈C K×K To restore the vector s, the restored vector is expressed as ρ represents the power of the transmitted signal, n∈C M×1 is the received noise vector. For any user, the co...

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Abstract

The invention relates to a hybrid beam forming method based on maximized minimum phase difference. An existing method for simulating a beam forming part requires a large number of codebook sets for recovering the signal transmitted by the terminal, which results in an excessive complexity and difficult implementation. The method comprises the steps: firstly selecting a vector set, capable of providing higher signal power, from a simulation beam forming vector codebook through using the correlation characteristics of a channel gain threshold and an array response vector; secondly, measuring theinter-user interference through the phase difference between the simulation beam forming vector and a main propagation path array response vector, and proposing the criterion of maximizing the minimum phase difference to suppress the strongest inter-user interference. The vector set capable of providing higher signal power is screened from the simulation beam forming vector codebook through the channel gain threshold, thereby ensuring large received power. The method of the invention can reduce interference between users, enlarges system capacity, and ensures lower complexity.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for reducing interference to a multi-user system, in particular to a method based on maximization in a millimeter-wave large-scale multiple-input multiple-output (MIMO) Hybrid beamforming method for minimum phase difference. Background technique [0002] With the rapid development of wireless communication, the existing low-band spectrum cannot meet the growing needs of people. Using the underutilized millimeter wave frequency band can meet people's needs for high-speed communication. The shorter millimeter wave wavelength is conducive to the deployment of large-scale arrays and improves the utilization of the transmission frequency band. In a multi-user millimeter-wave massive MIMO system, theoretically, digital precoding can be used to obtain the best performance. However, this requires each antenna to be connected to a separate radio frequency link. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0413H04B7/0408H04B7/06H04W16/28
CPCH04B7/0408H04B7/0413H04B7/0617H04W16/28
Inventor 胡安中丁亚迪
Owner 东营正诺技术服务有限公司
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