發(fā)布時(shí)間：2024-07-08 18:27

　　無(wú)線(xiàn)傳感器網(wǎng)絡(luò)近年來(lái)發(fā)展迅速,由于其具有體積小、自組織性、布置速度快、容錯(cuò)性強(qiáng)等優(yōu)良性能以及眾多的應(yīng)用領(lǐng)域,現(xiàn)在已經(jīng)成為了無(wú)線(xiàn)通信網(wǎng)絡(luò)中最重要的組成部分之一。在健康方面,無(wú)線(xiàn)傳感器可作為探測(cè)器進(jìn)入人的身體或附著于身體表面,幫助醫(yī)生診斷病情或治療疾病;在農(nóng)業(yè)方面,推進(jìn)智能農(nóng)業(yè)的進(jìn)步與發(fā)展,方便農(nóng)民,通過(guò)對(duì)農(nóng)田、作物數(shù)據(jù)的實(shí)時(shí)分析,合理規(guī)劃,增加產(chǎn)量;在工業(yè)上,可作為工業(yè)監(jiān)控,監(jiān)控工業(yè)生產(chǎn)中的各項(xiàng)指標(biāo),保證安全,提高產(chǎn)品合格率;氣象預(yù)測(cè)上,由于無(wú)線(xiàn)傳感器網(wǎng)絡(luò)的自組織性與快速布置性,傳感器布置更方便,對(duì)地形要求更低,所獲取的信息更全面,整體上可以提高氣象預(yù)測(cè)的準(zhǔn)確度;在軍事上,戰(zhàn)場(chǎng)環(huán)境的偵察、無(wú)人值守等都是無(wú)線(xiàn)傳感網(wǎng)絡(luò)的應(yīng)用場(chǎng)景。然而,在應(yīng)用這項(xiàng)技術(shù)的過(guò)程中,一些潛在的限制也在不斷地被發(fā)現(xiàn),比如電池續(xù)航能力的限制、測(cè)量精度的限制、帶寬限制等。其中最重要的限制之一便是數(shù)據(jù)傳輸過(guò)程、數(shù)據(jù)處理過(guò)程中的能量消耗。眾所周知,無(wú)線(xiàn)傳感器網(wǎng)絡(luò)的節(jié)點(diǎn)是由電力驅(qū)動(dòng)的,由于其無(wú)線(xiàn)、快速布置的性質(zhì)使其不得不使用電池的電力能源,而無(wú)法選擇有線(xiàn)電力傳輸。在電能受限的條件下,延長(zhǎng)無(wú)線(xiàn)傳感器網(wǎng)絡(luò)的使用壽命、提高傳輸效率對(duì)...

【文章頁(yè)數(shù)】：64 頁(yè)

【學(xué)位級(jí)別】：碩士

【文章目錄】：
摘要
ABSTRACT
Acknowledgement
Nomenclature
Chapter 1 Introduction
    1.1 Background
    1.2 Propose and Motivation
    1.3 Contributions
    1.4 Dissertation Outline
Chapter 2 Literature Review
    2.1 The Applications of WSNs and Design Factors
    2.2 Adaptive Filtering Algorithms
    2.3 Channel Estimation Algorithms
    2.4 Data Censoring Techniques for WSNs
    2.5 Summary
Chapter 3 Cooperative WSN System Model with Data Censoring
    3.1 Cooperative WSN System with Data Censoring
    3.2 Data Censoring Schemes
        3.2.1 NAC scheme
        3.2.2 AC scheme
    3.3 Channel Estimation Framework with NAC and AC
    3.4 Summary
Chapter 4 Proposed Channel Estimation Algorithms with NAC
    4.1 SGD-MLE Algorithm with NAC
    4.2 Newton-MLE Algorithm with NAC
    4.3 Censoring Ratio Analysis with NAC
    4.4 Simulations
        4.4.1 MSE Performance
        4.4.2 Verification of the CR Analysis
    4.5 Summary
Chapter 5 Proposed Channel Estimation Algorithms with AC
    5.1 LMS Algorithm with AC
    5.2 SM-NLMS Algorithm with AC
    5.3 RLS Algorithm with AC
    5.4 Censoring Ratio Analysis for AC schemes
    5.5 Computational Complexity Analysis
    5.6 Simulations
        5.6.1 MSE Performance
        5.6.2 Verification of the CR Analysis
    5.7 Summary
Conclusions
References
Author’s Publications



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