User grouping and power distribution method under millimeter wave MIMO-NOMA system

A technology of MIMO-NOMA and user grouping, which is applied in the field of user grouping and power allocation under the millimeter-wave MIMO-NOMA system to achieve the effect of improving the spectral efficiency of the system

Active Publication Date: 2022-01-11
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, each radio frequency chain in this method can only serve two users, and it is not suitable for the situation where the number of users is much larger than that of radio frequency chains

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  • User grouping and power distribution method under millimeter wave MIMO-NOMA system
  • User grouping and power distribution method under millimeter wave MIMO-NOMA system
  • User grouping and power distribution method under millimeter wave MIMO-NOMA system

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Embodiment Construction

[0057] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto. Example

[0058] In this example, if figure 1 Shown is a single-cell downlink mmWave MIMO-NOMA system, the system conditions are assumed to be: the base station is equipped with N BS root transmitting antenna, N RF RF chains serving K multi-antenna users. Among them, N BS >>N RF .

[0059] The present invention proposes a method for user grouping and power allocation under a millimeter-wave MIMO-NOMA system based on message delivery, the method comprising the following steps:

[0060] Step 1: The base station obtains the user's downlink channel information, and the digital precoder is and equal power distribution Perform analog precoding.

[0061] In step 1, the base station obtains the downlink channel information of the user, and the method of performing analo...

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Abstract

The invention discloses a message passing-based user grouping and power distribution method under a millimeter wave MIMO-NOMA system, which comprises the following steps of: (1) acquiring downlink channel information of a user by a base station, and performing analog pre-coding; and (2) providing a user grouping algorithm based on a minimum summation message passing strategy in order to maximize the weighted sum rate of the system, and obtaining a matching result of the user and the radio frequency chain. and (3) adopting zero-forcing digital precoding to suppress inter-group interference, and adopting a low-complexity power distribution method to maximize the weighting and rate of the system. According to the invention, the spectrum efficiency of the system can be effectively improved, hardware resources of the system are fully utilized, and the method can be used for multi-user data transmission.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a user grouping and power allocation method under the millimeter wave MIMO-NOMA system. Background technique [0002] With the explosive growth of connected devices in communication systems, available radio resources have become extremely scarce, which poses unprecedented challenges to the development of fifth-generation (5G) wireless communications. In order to alleviate the shortage of radio resources and increase the transmission rate of communication, a direct method is to use higher frequency frequency band resources. For example, the millimeter wave (mmWave) frequency band from 30 GHz to 300 GHz has been regarded as one of the technologies with great potential since the mmWave can provide a wider wireless frequency band. [0003] mmWave also promotes the application of massive multiple-input multiple-output (MIMO) technology, realizes spatial multiplexing ...

Claims

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Application Information

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IPC IPC(8): H04B7/0417H04B7/06H04B7/0452
CPCH04B7/0443H04B7/0617H04B7/0452Y02D30/70
Inventor 王小明高金玉蒋锐徐友云
Owner NANJING UNIV OF POSTS & TELECOMM
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