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Method and device for selecting duplex mode in two-way relay system based on decoding and forwarding

A two-way relay, duplex technology, applied in transmission systems, duplex signal operations, radio transmission systems, etc., can solve the problems of strong interference, low system spectral efficiency, etc., to reduce energy consumption, optimize spectrum resources, The effect of improving the efficiency of information exchange

Active Publication Date: 2019-12-13
CHINA ACADEMY OF INFORMATION & COMM
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Problems solved by technology

When the system works in full-duplex mode, an unavoidable problem is the influence of self-interference, that is, the strong interference from the transmitting antenna of the node to the receiving antenna of the node; when the system works in half-duplex mode, the system spectrum Inefficiency, which is becoming more and more prominent in the context of increasingly tight spectrum resources

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  • Method and device for selecting duplex mode in two-way relay system based on decoding and forwarding
  • Method and device for selecting duplex mode in two-way relay system based on decoding and forwarding

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] figure 1 It is a schematic flowchart of a method for selecting a duplex mode in a two-way relay system based on decoding and forwarding provided by an embodiment of the present invention. Such as figure 1 As shown, the method mainly includes the following steps:

[0025] Step 1, establishing a two-way relay communication system, and detecting the noise spectral density variance of the two-way relay communication system. Wherein, the established syste...

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Abstract

The invention provides a duplex mode selection method and device for a bidirectional relay system based on decoding and forwarding. The method comprises the steps of: establishing a bidirectional relay communication system, and detecting the noise spectral density variance of the bidirectional relay communication system; normalizing the sending power of terminal nodes A and B and a relay node R; when the system works in a full-duplex mode, respectively calculating the signal to interference and noise ratios of the terminal nodes A and B and the relay node R; according to the signal to interference and noise ratios of the nodes A and B and the node R, respectively calculating the bit error rates of the nodes A, B and R; according to the bit error rates of the terminal nodes A, B and R, calculating the throughput rate of the bidirectional relay communication system in the full-duplex mode, and calculating the throughput rate of the system in a half-duplex mode; and, comparing the throughput rate of the system in the full-duplex mode with the throughput rate of the system in the half-duplex mode, and performing signal transmission by selecting the duplex mode having relatively high throughput rate.

Description

technical field [0001] The invention relates to the technical field of relay communication, in particular to a method and device for selecting a duplex mode of a two-way relay system based on decoding and forwarding. Background technique [0002] In the prior art, the working mode of the terminal node and the relay node in the two-way relay communication system is usually fixed, they either work in the full-duplex mode or in the half-duplex mode, and it is impossible to automatically adjust according to the number of bits exchanged by the system duplex mode. When the system works in full-duplex mode, an unavoidable problem is the influence of self-interference, that is, the strong interference from the transmitting antenna of the node to the receiving antenna of the node; when the system works in half-duplex mode, the system spectrum Inefficiency, this problem has become increasingly prominent in the case of increasingly tight spectrum resources. Therefore, how to automati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/155H04L5/14H04L5/16
CPCH04B7/15557H04L5/14H04L5/16
Inventor 吴荻果敢石美宪任海英苏庚
Owner CHINA ACADEMY OF INFORMATION & COMM
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