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A combined uplink receiving method for decellularized massive MIMO system

A joint reception, large-scale technology

Active Publication Date: 2022-03-08
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a traditional cellular massive MIMO system, all access points (access points, APs) serve all users at the same time. However, this requires the consumption of a large amount of fronthaul link resources, which limits the further improvement of the cellular massive MIMO system performance.
[0003] In the existing technology, in the user-centered decellularized massive MIMO system, the standard for selecting which APs serve users is generally relatively simple, and the number of served users of each AP is mostly fixed, resulting in a significant decline in the service quality of some users

Method used

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  • A combined uplink receiving method for decellularized massive MIMO system
  • A combined uplink receiving method for decellularized massive MIMO system
  • A combined uplink receiving method for decellularized massive MIMO system

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0056] Such as figure 1 As shown, the present invention proposes an uplink joint reception method based on a user-centered decellularized massive MIMO system. It is assumed that each AP only serves a subset of users, and the fronthaul link is greatly reduced at the cost of losing part of the performance. capacity requirements. Include the following steps:

[0057] Step 1.1, establish as figure 1 The user-centric decellularized massive MIMO system model shown: For M APs with N antennas and K single-antenna users, M>>K, let m∈{1,2,…,M} represents the number of the AP, k∈{1,2,…,K} represents the number of the user, let Indicates the set (cluster) of APs serving user k, Represents a cluster The set of served users, the channel between AP m and user k can be modeled as:

[0058]

[0059] Among them, β mk Denotes the large-scale fading ...

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Abstract

The invention discloses a combined uplink receiving method of a large-scale MIMO system without cellular. The steps include: establishing a system model, calculating an approximate closed-form expression of an uplink user attainable rate of a zero-forcing receiver; using continuous convex approximation power control Algorithm, calculate the transmission power control coefficient of each user; execute the AP selection scheme based on the maximum system and rate, select several optimal APs for each user; the system CPU sleeps APs that do not serve users, and repeat step 2 to obtain the optimal transmission power The control coefficient realizes the combined uplink reception of the system. The invention takes the user as the center and uses statistical channel state information to perform uplink joint reception, significantly and effectively improves the total energy efficiency of the system, and simultaneously reduces the burden on the front transmission link.

Description

technical field [0001] The invention belongs to the field of mobile communication, and in particular relates to an uplink joint receiving method of a decellularized massive MIMO system. Background technique [0002] De-cellular massive multiple-input multiple-output (MIMO) is a feasible network architecture that completely changes the existing cellular network architecture. It combines the concepts of distributed MIMO and massive MIMO, and is expected to Inherit all the advantages of both systems. In a traditional decellularized massive MIMO system, all access points (access points, APs) serve all users at the same time, however, this consumes a large amount of fronthaul link resources, which limits the further performance improvement of the decellularized massive MIMO system. [0003] In the prior art, in the user-centric decellularized massive MIMO system, the standard for selecting which APs serve users is generally relatively simple, and the number of served users of ea...

Claims

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Application Information

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IPC IPC(8): H04B7/0413H04B7/0426H04L25/02H04W52/26
CPCH04B7/0413H04B7/0426H04L25/0204H04L25/0224H04L25/0256H04W52/267
Inventor 杨龙祥唐伟张尧
Owner NANJING UNIV OF POSTS & TELECOMM
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