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Distributed detection method of large-scale multiuser MIMO system

A detection method and distributed technology, applied in diversity/multi-antenna systems, transmission systems, baseband systems, etc., can solve the problems of increasing complexity and reducing the detection performance of EP detectors

Active Publication Date: 2018-04-17
SOUTHEAST UNIV
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Problems solved by technology

[0004] In order to solve the technical problems raised by the above-mentioned background technology, the present invention aims to provide a distributed detection method for a massive multi-user MIMO system, which solves the problem in the prior art that the complexity increases with the increase in the number of antennas at the receiving end, and at the same time Does not degrade the detection performance of EP detectors

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  • Distributed detection method of large-scale multiuser MIMO system
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  • Distributed detection method of large-scale multiuser MIMO system

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Embodiment Construction

[0049] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0050] A distributed detection method for massive multi-user MIMO systems, suitable for wireless communication systems, through the distributed detection method of maximum ratio combination after grouping EP detection and processing of received signals, reducing the EP detector's performance in large-scale multi-user MIMO systems The complexity of the application, including the following steps:

[0051] (1) There are K single-antenna users in the uplink of the massive multi-user MIMO system, and there are N antennas at the base station, where N≥K. For the kth single-antenna user, the bit stream is mapped to the constellation symbol x k , the set of constellation symbols is Ω k , with an average symbol energy of E x =E{|x k | 2}, the channel is a Gaussian white noise channel, and the vector form of the received signal at the receiving en...

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Abstract

The invention discloses a distributed detection method of a large-scale multiuser MIMO system. The method comprises the following steps: dividing received signals into multiple groups, performing distributed signal detection on each group of received signals by using an MIMO signal detection module based on an EP algorithm, and then adopting different processing processes on three EP MIMO detectors to obtain a final detection result. According to the distributed detection method disclosed by the invention, the application complexity of the EP algorithm in the signal detection of the large-scale multiuser MIMO system is greatly reduced by a distributed design, the three distributed MIMO detectors based on the EP algorithm have excellent performance in the large-scale multiuser MIMO system,and the distributed detection method can be implemented in terms of complexity.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a distributed detection method of a massive multi-user MIMO system. Background technique [0002] Massive multi-user MIMO (multiple-input multiple-output) system is a key technology of 5G wireless communication, which can increase the throughput of wireless communication system to support the transmission of massive data. The massive multi-user MIMO system is equipped with a large number of antennas at the base station to support wireless signal transmission of multiple users at the same time. In the uplink, the user's transmission signal is received by the base station receiving antenna array after passing through the wireless channel, and then the original user transmission signal is restored through channel estimation and MIMO signal detection. Existing MIMO signal detection methods include MMSE (minimum mean-square-error), MMSE-SIC (successive inte...

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Application Information

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IPC IPC(8): H04B7/0452H04B7/08H04L25/02
CPCH04B7/0452H04B7/0802H04L25/024H04L25/0242
Inventor 金石高璇璇温朝凯
Owner SOUTHEAST UNIV
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