Decode-and-forward strategy based multi-antenna relay beam forming method

A beamforming, decoding and forwarding technology, used in diversity/multi-antenna systems, space transmit diversity, transmission systems, etc., to improve transmission efficiency and reliability, minimize channel interruption probability, and save transmission power.

Inactive Publication Date: 2013-01-16
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no research that combines relay technology with multi-antenna beamforming

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  • Decode-and-forward strategy based multi-antenna relay beam forming method
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  • Decode-and-forward strategy based multi-antenna relay beam forming method

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Embodiment Construction

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0029] The present invention proposes a multi-antenna relay beamforming method based on a decoding and forwarding strategy. In the case where the source node S and the relay node R are configured with multiple antennas, and the destination node D is configured with a single antenna, the effect is very obvious. Using this method, a round of information transmission needs two time slots to complete, and the transmission method is as follows: figure 1 shown, including the following steps:

[0030] S1: In the first time slot, find the beam...

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Abstract

The invention provides a decode-and-forward strategy based multi-antenna relay beam forming method which includes the steps: in the first time slot, obtaining a beam forming vector of a signal source node S, enabling the signal source node S to send signals s1 to a relay node R and a destination node D simultaneously, and enabling the relay node R and the destination node D to receive the signals s1 simultaneously; and in the second time slot, enabling the relay node R to receive and decode the signals s1, recoding information to signals s2 and sending the signals s2 to the destination node D. By the decode-and-forward strategy based multi-antenna relay beam forming method, the design that the beam forming vector of the signal source node S is obtained in the first time slot is provided, so that transmission efficiency is maximized, and channel interrupt probability is minimized; and the relay technology and the multi-antenna beam forming technology are combined together, the optimal beam forming vector is designed, and accordingly transmission efficiency and reliability can be improved, and transmitting power is saved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication networks, relates to wireless cooperative relay transmission, and in particular to a multi-antenna relay beamforming method based on a decoding and forwarding strategy. Background technique [0002] Relay technology has received extensive attention because it can expand the coverage of wireless networks and increase the rate of information transmission. In 4G mobile communication technologies such as LTE-Advanced, relay technology will also be selected as an important means of system performance improvement. There are three main types of relay strategies to be selected: the first type is the relay strategy of decoding and forwarding. In this relay strategy, the relay node accurately decodes and then forwards; In this relay strategy, the relay node only amplifies the received signal and then forwards it; the third type is the estimated forwarding relay strategy. In this relay strate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06H04L1/00
CPCY02D30/70
Inventor 许正锋樊平毅熊轲易粟雷鸣
Owner TSINGHUA UNIV
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