天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

認知無線電中分簇協(xié)作頻譜感知算法研究

發(fā)布時間:2018-04-19 21:49

  本文選題:信道衰落 + 協(xié)作頻譜感知 ; 參考:《內(nèi)蒙古大學》2014年碩士論文


【摘要】:認知無線電是一種智能的無線通信技術(shù),可以有效地解決頻譜共享問題。本文在深入研究認識無線電技術(shù)的基礎上,重點探討了其關(guān)鍵技術(shù)之一的頻譜感知技術(shù),并完成以下創(chuàng)新性研究成果: 針對信道衰落和多徑衰落對認知無線電協(xié)作頻譜感知性能的影響,本文基于位置和信道兩個方面優(yōu)化了多簇協(xié)作頻譜感知,并結(jié)合改進的雙門限能量檢測提高頻譜感知性能。改進的雙門限能量檢測是把處于兩個門限值之間的檢測能量值也傳送到數(shù)據(jù)融合中心,數(shù)據(jù)融合中心根據(jù)網(wǎng)絡期望的目標虛警概率得到網(wǎng)絡門限值,據(jù)此將該能量值做融合處理,并參與網(wǎng)絡的判決。仿真結(jié)果表明,該算法的頻譜感知準確度高于傳統(tǒng)的基與位置的分簇協(xié)作頻感知算法,可以提高整個網(wǎng)絡的頻譜感知性能。 針對采用雙門限能量檢測給網(wǎng)絡帶來的通信流量大,占用控制信道較寬的問題,對簇內(nèi)的改進雙門限能量檢測協(xié)作頻譜感知算法進一步優(yōu)化。在保證感知性能的前提下,適當減少簇內(nèi)參與協(xié)作感知的認知用戶數(shù)量,以此降低整個網(wǎng)絡在頻譜感知時所需要的通信流量和網(wǎng)絡消耗。仿真結(jié)果表明,當信噪比為l0dB時,優(yōu)化后的整個網(wǎng)絡的檢測概率從75%提高到99%。 本文在最后對全文進行了總結(jié),并對認知無線電的分簇協(xié)作頻譜頻譜感知技術(shù)進行了展望。
[Abstract]:Cognitive radio is an intelligent wireless communication technology, which can effectively solve the problem of spectrum sharing. On the basis of in-depth research and understanding of radio technology, this paper focuses on spectrum sensing technology, one of its key technologies, and completes the following innovative research results: Aiming at the influence of channel fading and multipath fading on cognitive radio cooperative spectrum sensing performance, this paper optimizes multi-cluster cooperative spectrum sensing based on location and channel, and improves spectrum sensing performance by combining improved dual-threshold energy detection. The improved double threshold energy detection is to transmit the detection energy between two threshold values to the data fusion center. The data fusion center obtains the network threshold value according to the expected false alarm probability of the network. Based on this, the energy value is fused and involved in the judgment of the network. Simulation results show that the spectrum sensing accuracy of the proposed algorithm is higher than that of the traditional clustering and position cooperative frequency sensing algorithm, which can improve the spectrum sensing performance of the whole network. In order to solve the problem of large communication flow and wide occupation of control channel caused by dual-threshold energy detection, the improved cooperative spectrum sensing algorithm for dual-threshold energy detection in clusters is further optimized. In order to reduce the communication traffic and network consumption in spectrum sensing the number of cognitive users involved in cooperative sensing can be reduced properly on the premise of ensuring the performance of perception. The simulation results show that the detection probability of the optimized network is increased from 75% to 99% when the SNR is l0dB. At the end of this paper, the thesis summarizes the whole thesis and looks forward to the cooperative spectrum sensing technology of cognitive radio.
【學位授予單位】:內(nèi)蒙古大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TN925

【參考文獻】

相關(guān)期刊論文 前1條

1 朱佳;鄭寶玉;鄒玉龍;;基于最佳中繼選擇的協(xié)作頻譜感知方案研究[J];電子學報;2010年01期



本文編號:1774871

資料下載
論文發(fā)表

本文鏈接:http://sikaile.net/kejilunwen/wltx/1774871.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶bdfec***提供,本站僅收錄摘要或目錄,作者需要刪除請E-mail郵箱bigeng88@qq.com
五月激情五月天综合网| 日本久久中文字幕免费| 欧美视频在线观看一区| 大香蕉大香蕉手机在线视频| 亚洲av在线视频一区| 精品人妻一区二区三区免费| 少妇人妻精品一区二区三区| 人妻内射精品一区二区| 精品一区二区三区乱码中文| 99久久人妻中文字幕| 日韩精品免费一区三区| 九九热精品视频在线观看| 久久精品亚洲情色欧美| 国产内射一级二级三级| 国内真实露脸偷拍视频| 91欧美激情在线视频| 国产精品福利一二三区| 在线视频三区日本精品| 国产熟女一区二区不卡| 日韩欧美高清国内精品| 麻豆国产精品一区二区三区| 亚洲精品国男人在线视频| 五月婷婷欧美中文字幕| 亚洲一区二区三区四区| 亚洲天堂久久精品成人| 日韩欧美国产三级在线观看| 日本不卡在线视频中文国产| 国产中文字幕久久黄色片| 国产精品熟女在线视频| 99免费人成看国产片| 日韩人妻中文字幕精品| 老司机精品视频免费入口| 日韩精品一区二区三区含羞含羞草| 最好看的人妻中文字幕| 色婷婷日本视频在线观看| 欧美亚洲综合另类色妞| 欧美成人国产精品高清| 视频在线播放你懂的一区| 五月天丁香亚洲综合网| 国产不卡一区二区四区| 好吊日成人免费视频公开|