本文選題：無線傳感器網(wǎng)絡(luò) + 協(xié)作式MIMO��； 參考：《湖北工業(yè)大學(xué)》2014年碩士論文

【摘要】：無線傳感器網(wǎng)絡(luò)已經(jīng)廣泛應(yīng)用在軍事、工業(yè)監(jiān)控、環(huán)境監(jiān)測和精細(xì)農(nóng)業(yè)等領(lǐng)域，在大部分應(yīng)用場景，傳感器節(jié)點(diǎn)是由能量有限的電池供電，而電池通常難以及時(shí)進(jìn)行充電或更換。因此，，提高能量效率有非常重要的意義。無線通信能耗是短距離通信為主的無線傳感器網(wǎng)絡(luò)能耗主要來源，多入多出（Multi-inputMulti-output，簡稱MIMO）技術(shù)通過在發(fā)射端和接收端上配置多根天線來獲取分集增益、復(fù)用增益和干擾管理等優(yōu)勢，在相同的系統(tǒng)性能要求下顯著降低無線通信的能耗。但是普通的無線傳感器節(jié)點(diǎn)受成本、體積和功率消耗等因素的限制，無法直接在無線傳感器節(jié)點(diǎn)上配置多根天線來實(shí)現(xiàn)MIMO通信。而協(xié)作式MIMO技術(shù)通過多個(gè)單根天線的無線傳感器節(jié)點(diǎn)構(gòu)成虛擬的天線陣列以協(xié)作的方式進(jìn)行傳輸，可以在相同的系統(tǒng)性能要求下顯著降低無線傳感器節(jié)點(diǎn)的無線通信能耗。因此，協(xié)作式MIMO技術(shù)被眾多研究人員視為提高無線傳感器網(wǎng)絡(luò)能量有效性，延長網(wǎng)絡(luò)生存時(shí)間的解決方案之一。但是真正將協(xié)作式MIMO技術(shù)應(yīng)用到無線傳感器網(wǎng)絡(luò)中仍有以下問題需要解決或完善：如何建立精確的協(xié)作式MIMO傳輸能耗的數(shù)學(xué)模型、如何優(yōu)化協(xié)作式MIMO傳輸?shù)耐ㄐ艆?shù)和針對特定的應(yīng)用環(huán)境如何設(shè)計(jì)能量高效的協(xié)作式MIMO傳輸策略。 本文得到了國家自然科學(xué)基金項(xiàng)目“面向鉆井工程實(shí)時(shí)監(jiān)測的協(xié)作式MIMO無線傳感器網(wǎng)絡(luò)應(yīng)用研究”（No.51174084）的資助。本文以提高無線傳感器網(wǎng)絡(luò)的能量有效性為目標(biāo)，圍繞如何優(yōu)化單信源組成的協(xié)作式MIMO系統(tǒng)的通信參數(shù)和設(shè)計(jì)能量有效的協(xié)作式MISO傳輸策略展開分析和研究。本文的研究內(nèi)容主要包括以下兩個(gè)方面： 1）針對現(xiàn)有的協(xié)作式MIMO技術(shù)能量有效性研究大多是基于固定的調(diào)制方式或者固定的協(xié)作節(jié)點(diǎn)數(shù)，沒有考慮自適應(yīng)速率調(diào)制或協(xié)作節(jié)點(diǎn)數(shù)可變的情況這一問題，本文以無線傳感器網(wǎng)絡(luò)中單信源組成的協(xié)作式MIMO系統(tǒng)采用基于STBC方案、基于V-BLAST方案和基于協(xié)作波束形成方案的能耗優(yōu)化問題進(jìn)行了研究，提出了一種針對調(diào)制參數(shù)、協(xié)作節(jié)點(diǎn)數(shù)進(jìn)行兩步優(yōu)化的方法，達(dá)到了有效降低系統(tǒng)總能耗，提高能量有效性的目的。 2)針對現(xiàn)有的基于協(xié)作式MISO技術(shù)的網(wǎng)絡(luò)生存時(shí)間研究大多是基于單一的單跳傳輸策略或多跳傳輸策略，單一的基于協(xié)作式MISO單跳傳輸或基于協(xié)作式MISO多跳傳輸易導(dǎo)致簇的能耗不均衡的問題，提出了一種基于協(xié)作式MISO的單跳傳輸和多跳傳輸相結(jié)合的混合傳輸策略，該策略實(shí)現(xiàn)了有效地提高能量有效性，延長了網(wǎng)絡(luò)生存時(shí)間的目的。
[Abstract]:Wireless sensor networks have been widely used in military, industrial monitoring, environmental monitoring and fine agriculture. In most application scenarios, sensor nodes are powered by batteries with limited energy. Batteries are often hard to charge or replace in time. Therefore, it is very important to improve energy efficiency. Wireless communication energy consumption is the main source of energy consumption in wireless sensor networks based on short distance communication. Multi-input Multi-Output (Mimo) technology can obtain diversity gain, multiplexing gain and interference management by configuring multiple antennas on the transmitter and receiver. The energy consumption of wireless communication is significantly reduced under the same system performance requirements. However, the common wireless sensor nodes are limited by the cost, volume and power consumption, so it is impossible to directly configure multiple antennas on the wireless sensor nodes to achieve MIMO communication. Cooperative MIMO technology is transmitted by virtual antenna array through multiple wireless sensor nodes with single antenna, which can significantly reduce the wireless communication energy consumption of wireless sensor nodes under the same system performance requirements. Therefore, cooperative MIMO technology is regarded by many researchers as one of the solutions to improve the energy efficiency and prolong the lifetime of wireless sensor networks. But there are still some problems that need to be solved or perfected in the application of cooperative MIMO technology to wireless sensor networks: how to establish a precise mathematical model of cooperative MIMO transmission energy consumption. How to optimize the communication parameters of cooperative MIMO transmission and how to design an energy-efficient cooperative MIMO transmission strategy for a specific application environment. This paper is supported by the National Natural Science Foundation of China "Cooperative MIMO Wireless Sensor Network Application Research for drilling Engineering Real-time Monitoring" No. 51174084. Aiming at improving the energy efficiency of wireless sensor networks, this paper focuses on how to optimize the communication parameters of cooperative MIMO systems composed of single source and design a cooperative miso transmission strategy with energy efficiency. The research contents of this paper mainly include the following two aspects: 1) most of the existing cooperative MIMO technology energy efficiency research is based on a fixed modulation or fixed number of cooperative nodes. The problem of adaptive rate modulation or variable number of cooperative nodes is not considered in this paper. In this paper, a cooperative MIMO system based on STBC is proposed, which is composed of single source in wireless sensor networks. The energy consumption optimization problem based on V-BLAST scheme and cooperative beamforming scheme is studied. A two-step optimization method for modulation parameters and cooperative node points is proposed, which can effectively reduce the total energy consumption of the system. The purpose of improving energy efficiency. 2) in view of the existing network lifetime research based on cooperative miso technology, most of the researches are based on a single single-hop transmission strategy or multi-hop transmission strategy. Single cooperative miso single-hop transmission or cooperative miso multi-hop transmission is prone to lead to uneven energy consumption of clusters. A hybrid transmission strategy based on cooperative miso is proposed, which combines single-hop transmission and multi-hop transmission. This strategy can effectively improve the energy efficiency and prolong the network lifetime.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN919.3

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本文編號：2017486