Double-bounce half-duplex MIMO (Multiple-input multiple-output) relay network distributed type beam forming method

A relay network and distributed technology, which is applied in the field of distributed beamforming of a two-hop half-duplex MIMO relay network, can solve problems such as performance degradation and hard-to-find channels

Inactive Publication Date: 2012-08-22
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, through the simulation under the Rice channel, it can be found that the performance of the MF and MF-RZF methods with the best performance

Method used

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  • Double-bounce half-duplex MIMO (Multiple-input multiple-output) relay network distributed type beam forming method
  • Double-bounce half-duplex MIMO (Multiple-input multiple-output) relay network distributed type beam forming method
  • Double-bounce half-duplex MIMO (Multiple-input multiple-output) relay network distributed type beam forming method

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Embodiment

[0070] This embodiment is a half-duplex two-hop MIMO wireless network with one source node S, one sink node W, and K relay nodes. Both the source node S and the sink node W in the system have M antennas, and each relay node has K antennas; in this example, M=4, N=4, K=4 (except Figure 5 K in increases from 0 to 30), Specific network model and channel information such as figure 1 shown. The implementation steps are:

[0071] Step 1: Source node S transmits to all K relay nodes R through M transmitting antennas i , iP{1, 2, ·, K} sends broadcast information x S . where x S is an Mλ1-dimensional vector, and the total power of the transmitted signal is P, that is

[0072] Step 2: each relay node separately receives the signal y k Perform beamforming. In this example, the received signal y k Can be expressed as: In this formula, is the backward channel matrix between the source node and the kth relay node, and H 1 , H 2 ,...,H K Rice distribution independent of...

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Abstract

The invention provides a double-bounce half-duplex MIMO (Multiple-input Multiple-output) relay network distributed type beam forming method, and provides two distributed type beam forming schemes, namely, RZF (Regularized Zero Forcing) and IRZF (Information Regularized Zero Forcing)-MF (Matched Filter), which take a multi-antenna multi-relay double-bounce half-duplex wireless network into account, are based on RZF precoding technology and MF technology, and are suitable for a rice channel. At a relay node, beam formation is received and transmitted by utilizing the RZF technology in the RZF scheme, and the beam formation is received and transmitted by respectively utilizing the IRZF technology and MF technology in the IRZF-MF scheme. According to the schemes, the relay node is required to obtain self channel state information in the forward direction and the backward direction, at a target node, a QR receiver is used for continuous interference eliminating detection to obtain maximum spatial multiplexing gain. The test result shows that the two schemes provided by the invention can be completely suitable for rice channel conditions, and the channel capacity approximate to the upper bound of the capacity can be obtained under the channel conditions.

Description

technical field [0001] The invention relates to a method in the technical field of wireless communication, in particular to a distributed beam forming method of a two-hop half-duplex MIMO relay network. Background technique [0002] In mobile communication, Multiple-Input Multiple-Output (MIMO) wireless transmission technology uses space resources to increase transmission rate and reliability, and has been fully developed in the past ten years. For a point-to-point MIMO communication system, when the communication terminal is fully aware of the channel state information (Channel State Information, CSI), beamforming (Beam Forming, BF) is used at the transmitting end, and Maximal Ratio Combining (MRC) technology is used at the receiving end It can effectively overcome the negative impact brought by channel fading. At the same time, research work in recent years has shown that the enhanced communication of relay cooperation can greatly improve the system spectrum utilization a...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04L5/16
Inventor 黄自立占敖蒋铃鸽何晨
Owner SHANGHAI JIAO TONG UNIV
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