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Iterative Soft Interference Cancellation Reception Method under Massive MIMO Omnidirectional Precoding Transmission

A technology of interference cancellation and precoding, applied in transmission systems, digital transmission systems, and shaping networks in transmitters/receivers, etc., can solve the problem that the signal-to-noise ratio of signal reception is difficult to be guaranteed.

Active Publication Date: 2021-04-23
SOUTHEAST UNIV
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Problems solved by technology

However, the interference randomization technology cannot fundamentally eliminate the influence of inter-cell interference, and the received signal-to-noise ratio of the signal is still difficult to guarantee

Method used

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  • Iterative Soft Interference Cancellation Reception Method under Massive MIMO Omnidirectional Precoding Transmission
  • Iterative Soft Interference Cancellation Reception Method under Massive MIMO Omnidirectional Precoding Transmission
  • Iterative Soft Interference Cancellation Reception Method under Massive MIMO Omnidirectional Precoding Transmission

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] 1. System composition and transmission scheme

[0026] figure 1 It is a schematic diagram of a massive MIMO wireless communication system in a multi-cell environment. In this embodiment, only discrete time-domain narrowband channels are considered, and there is only a single composite path in the considered narrowband channel, and the considered narrowband channel can be regarded as a subcarrier channel in a conventional wideband OFDM system. Accordingly, the involved The digital baseband transmit and receive signals are signals on the time-frequency resources of the broadband OFDM system. In addition, without loss of generality, only the reception of a single user equipment is considered, and the number of receiving antennas of the user equipment is N R , a total of omni-directional signals sent by K cell base stations are received, ...

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Abstract

The invention discloses an iterative soft interference elimination receiving method under massive MIMO omnidirectional precoding transmission. The signal sent by the cell base station is an omnidirectional signal generated by low-dimensional space-time coding and omnidirectional precoding extension. The receiving end performs soft-input and soft-output detection and decoding on the omni-directional signals from the target cell and the interfering cell in the precoding domain at the same time. The accuracy of reconstruction can better eliminate the influence of inter-cell interference. The invention can solve the problem that strong inter-cell interference affects the reliability of omnidirectional signal reception in a massive MIMO system. By using a low-complexity soft-input and soft-output detector and decoder, while ensuring effective suppression of inter-cell interference, the implementation complexity of the receiver is reduced.

Description

technical field [0001] The invention relates to a cellular mobile communication system using a large-scale antenna array on the base station side, in particular to an iterative soft interference cancellation receiving method under massive MIMO omnidirectional precoding transmission. Background technique [0002] In recent years, a MIMO (Massive MIMO) wireless communication system configured with a large number of antennas at the base station has attracted extensive attention from academia and industry. In a massive MIMO system, the base station generally configures more than dozens of antenna units (such as 128 or 256), and serves dozens of users (such as 40) at the same time. A large number of antenna units at the base station can greatly improve the spatial freedom of wireless communication, and greatly improve the transmission rate, spectrum efficiency and power efficiency. In a massive MIMO wireless communication system, data service signals are generally transmitted us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L1/00
CPCH04L1/0048H04L1/005H04L25/03318H04L25/03324
Inventor 高西奇林宇孟鑫
Owner SOUTHEAST UNIV
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