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User grouping method based on out-of-band spatial information in multi-user millimeter wave system

A space information and user grouping technology, which is applied in space transmit diversity, diversity/multi-antenna systems, transmission systems, etc., can solve the problems of high energy and time consumption, low reception signal-to-noise ratio in the initial beam search stage, etc., and achieve reduction The effect of user energy consumption, reducing the number of receiving beam searches, and improving system efficiency

Inactive Publication Date: 2020-07-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of high energy and time consumption in the multi-user beam selection process in the multi-user millimeter wave system, and the problem that the signal-to-noise ratio is too low in the initial beam search stage, and a user grouping method based on out-of-band spatial information is proposed

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  • User grouping method based on out-of-band spatial information in multi-user millimeter wave system
  • User grouping method based on out-of-band spatial information in multi-user millimeter wave system
  • User grouping method based on out-of-band spatial information in multi-user millimeter wave system

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[0034] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] The scheme of the present invention is applied in such as figure 1 In the multi-broadband MIMO system shown, considering that the current multi-level codebook algorithm has a too low acceptance signal-to-noise ratio in the initial beam search stage, the present invention will use the spatial information of the microwave system to assist the establishment of millimeter-wave links, especially for Analog or hybrid beamforming mmWave systems to find optimal transmit and receive beam pairs. Since the microwave system antenna is not equipped with a large-scale antenna array, it is assumed to have a narrow-band MIMO channel and a traditional all-digital structure. Both microwave and mmWave systems will use a uniform linear array (ULA) at both the transmit and receive ends. For convenience of description, the figur...

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Abstract

The invention belongs to the technical field of wireless communication, and in particular relates to a user grouping method based on out-of-band space information in a multi-user millimeter wave system. In order to solve the problem that the multi-user beam selection process consumes a lot of energy and time in the multi-user mmWave system, and the acceptance signal-to-noise ratio is too low in the initial beam search stage, a user grouping method based on out-of-band spatial information is proposed. Make full use of the out-of-band space information through the grouping strategy, compress the search range at the base station, and perform beam search in a more accurate initial range. On the user end, the strategy of keeping quiet in non-group search subframes is used to reduce the number of receiving beam searches and save user energy consumption. Also benefiting from the grouping strategy, during the feedback process, the user terminal only needs to feed back the beam matching information in the corresponding search subframe of the group, which removes the disadvantages of needing to feed back more redundant information in the traditional search method, and reduces the feedback overhead. Improve system efficiency.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to millimeter-wave communication (Millimeter-Wave (mmWave) Communication), beam selection technology, and multiple input multiple output (Multiple Input Multiple Output, MIMO) technology, specifically to multi-user millimeter wave A user grouping method based on out-of-band spatial information in the system. Background technique [0002] With the development of wireless communication, millimeter wave (Millimeter wave (mmWave)) is considered to be one of the core technology candidates for next-generation wireless communication technology, which can greatly broaden the available spectrum resources. However, compared with traditional microwave frequencies, A key challenge in using the mmWave frequency band is its severe signal propagation loss. To compensate for such losses, large antenna arrays can be employed to achieve high power gains. Fortunately, due to the small w...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/06H04B7/08H04L25/02
CPCH04B7/0413H04B7/0634H04B7/0894H04L25/0224H04L25/0242H04B7/0695Y02D30/70H04B7/0452H04B7/0626
Inventor 李彬睿张忠培姚倍琳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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