本文選題：連續(xù)波 + 傳播模型�。� 參考：《南京郵電大學》2017年碩士論文

【摘要】：通信系統(tǒng)的傳輸速率和傳輸質量受到無線信道的制約,只有充分研究無線信道特性,才能應用合適的物理層技術。而無線通信要解決傳輸面臨的挑戰(zhàn),首先要解決信號覆蓋問題�；谙乱淮鸁o線通信的頻譜需求,本文對第四代移動通信候選頻段3.5GHz,下一代通信候選頻段28GHz和39GHz信道的傳播特性做了相關研究,分析結果對SG網絡的部署具有重要意義。本文根據已有的窄帶和寬帶測量方案,針對室外傳播模型的研究提出了 CW窄帶信道測量方案,設計了一套精度高實用性強的測量系統(tǒng)。對城市郊區(qū)的宏窩小區(qū)、NLOS場景做了重點研究。以自由空間傳播理論為依據,用自由空間參考距離損耗模型(CI損耗模型)和浮動截距損耗模型(FI損耗模型)分析了測量數據。對于CI損耗模型求出了路徑損耗指數n,陰影衰落方差σCI。對于FI損耗模型求出了截距α,斜率β和陰影衰落方差σFI。此外將FI損耗模型與3GPP 36.873、38.900損耗模型做對比分析,量化了 3GPP模型與我國特定環(huán)境損耗之間的差異�；谒袛祿�,對于高低頻信號傳播模型總結如下:(1)隨著頻率的增大,損耗越來越大。(2)接收機高度在一定范圍內增加,可以減小路徑損耗。(3)環(huán)境對高頻信號的影響要遠遠大于低頻。(4) 3GPP的UMaNLOS高頻損耗模型已不適用特定環(huán)境。
[Abstract]:The transmission rate and quality of the communication system are restricted by the wireless channel. Only by fully studying the characteristics of the wireless channel can the appropriate physical layer technology be applied. In order to solve the challenge of transmission, wireless communication must first solve the problem of signal coverage. Based on the spectrum requirements of the next generation wireless communication, this paper studies the propagation characteristics of 28GHz and 39GHz channels in the fourth generation mobile communication candidate band 3.5 GHz, the next generation mobile communication candidate band 28GHz and the 39GHz channel. The analysis results are of great significance to the deployment of SG network. In this paper, according to the existing narrowband and wideband measurement schemes, a CW narrowband channel measurement scheme is proposed for the study of outdoor propagation model, and a set of measurement system with high accuracy and practicability is designed. The NLOS scene of Hongwo district in the suburb of the city is studied emphatically. Based on the free space propagation theory, the measured data are analyzed by using the free space reference distance loss model (CI loss model) and the floating intercept loss model (FI loss model). For the CI loss model, the path loss exponent n and the variance 蟽 CI of shadow fading are obtained. For fi loss model, intercept 偽, slope 尾 and shaded fading variance 蟽 FI are obtained. In addition, the fi loss model and the 3GPP 36.873 ~ 38.900 loss model are compared and analyzed, and the difference between the 3GPP model and the specific environment loss in China is quantified. Based on all the data, the propagation model of high and low frequency signal is summarized as follows: 1) with the increase of frequency, the loss becomes larger and larger.) the height of receiver increases within a certain range. The influence of environment on high frequency signal is much greater than that on low frequency. 4) the UMaNLOS loss model which can reduce path loss is no longer suitable for special environment.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.5

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本文編號：1862537