Virtual MIMO power distribution transmission scheme based on wireless sensor network

Abstract

The invention discloses a virtual MIMO power distribution transmission proposal based on a wireless sensor network, comprising the following steps: firstly, nodes which are required to transmit information in a cluster respectively transmit RTX packets to convergent nodes in the wireless sensor network; secondly, the convergent nodes estimate channel impulse response of a link according to a RTS packet which is transmitted by each node; thirdly, optimized transmission power of each node is calculated by utilization of channel impulse response information, under the condition that total transmission power is certain, and an optimum power distribution algorithm based on a Karush-Kuhn-Tucker(KKT) condition and an suboptimum power distribution algorithm based on signal to interference and noise ratio (SINR) are adopted; fourthly, optimized transmission power information is added into CTS packets and then transmitted to the entire cluster by means of broadcast, and an idle MIMO channel is established; fifthly, after the transmission nodes in the cluster receive the CTS packets, the transmission nodes transmit signals simultaneously according to the optimized transmission power; sixthly, after the convergent nodes receive the signals which are transmitted by a plurality of nodes, decoding of each layer of signals is performed by adoption of a layer detection algorithm and through combination of the transmission power of each node; seventhly, wireless sensor network applications like target tracking and positioning and so on are performed according to information integration of each node. The invention is suitable for application in the wireless sensor network.

Description

technical field [0001] The invention relates to the field of wireless information transmission, in particular to a wireless sensor network-based virtual MIMO power allocation transmission scheme. Background technique [0002] Compared with the traditional single-antenna system, the multi-antenna (MIMO) technology can achieve better transmission performance under the same transmission power and transmission rate, and it is a research hotspot in the field of wireless communication today. However, due to the influence of factors such as the price and volume of the terminal equipment, it is not suitable to configure multiple antennas on the nodes of the wireless sensor network. In addition, a simple and easy-to-implement optimal allocation scheme for virtual MIMO transmit power is also an urgent problem to be solved. Contents of the invention [0003] The purpose of the present invention is to provide a virtual MIMO power optimization allocation and transmission scheme based ...

AI Technical Summary

Problems solved by technology

However, due to the influence of factors such as the price and volume of terminal equipment, it is not suitable to configure multiple antennas on the nodes of wireless sensor networks.

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