基于射線跟蹤和USRP的室內場強分布的研究
發(fā)布時間：2019-05-16 22:03
【摘要】：在微小區(qū)及微微小區(qū)模型中,不同小區(qū)間已不再存在統(tǒng)計相似性,例如室內場景。這種情況下使用統(tǒng)計模型或經驗模型等傳統(tǒng)方法對場強等電波傳播特性進行預測會產生比較大的誤差,所以有必要對特定室內場景中電波傳播特性進行測量與仿真,為信道建模和網絡規(guī)劃提供依據(jù)。本文設計并實現(xiàn)了一種基于軟件無線電的無線信號強度實時測量平臺,并針對某室內具體場景進行了場強測量。論文進一步利用射線跟蹤算法對同一場景下的場強分布進行了仿真。最后,對實測和仿真數(shù)據(jù)進行了比對分析,印證了該測量系統(tǒng)應用在實際環(huán)境之中的可行性。本測量系統(tǒng)以功率譜計算為核心,在信號接收端利用頻域功率譜濾除帶外噪聲,利用滑動平均窗口濾除快衰落,提高了測量精度;采用自動增益控制,增加了測量的距離;系統(tǒng)選用軟件無線電進行相關的信號處理,具有成本低,靈活性、擴展性和可移植性高的特點。
[Abstract]:In the micro-cell model and the micro-cell model, there is no longer statistical similarity between different cells, such as indoor scenes. In this case, the traditional methods such as statistical model or empirical model will produce large errors in predicting the propagation characteristics of radio waves such as field strength, so it is necessary to measure and simulate the propagation characteristics of radio waves in specific indoor scenes. It provides the basis for channel modeling and network planning. In this paper, a real-time measurement platform of wireless signal strength based on software radio is designed and implemented, and the field strength measurement is carried out for a specific indoor scene. In this paper, the ray tracking algorithm is used to simulate the field intensity distribution in the same scene. Finally, the measured and simulation data are compared and analyzed, which confirms the feasibility of the measurement system in the actual environment. The measurement system takes the power spectrum calculation as the core, uses the frequency domain power spectrum to filter out-of-band noise at the signal receiving end, uses the sliding average window to filter out the fast fading, improves the measurement accuracy, adopts the automatic gain control, increases the measurement distance. The system selects software radio for signal processing, which has the characteristics of low cost, flexibility, expansibility and portability.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN92
本文編號：2478584
[Abstract]:In the micro-cell model and the micro-cell model, there is no longer statistical similarity between different cells, such as indoor scenes. In this case, the traditional methods such as statistical model or empirical model will produce large errors in predicting the propagation characteristics of radio waves such as field strength, so it is necessary to measure and simulate the propagation characteristics of radio waves in specific indoor scenes. It provides the basis for channel modeling and network planning. In this paper, a real-time measurement platform of wireless signal strength based on software radio is designed and implemented, and the field strength measurement is carried out for a specific indoor scene. In this paper, the ray tracking algorithm is used to simulate the field intensity distribution in the same scene. Finally, the measured and simulation data are compared and analyzed, which confirms the feasibility of the measurement system in the actual environment. The measurement system takes the power spectrum calculation as the core, uses the frequency domain power spectrum to filter out-of-band noise at the signal receiving end, uses the sliding average window to filter out the fast fading, improves the measurement accuracy, adopts the automatic gain control, increases the measurement distance. The system selects software radio for signal processing, which has the characteristics of low cost, flexibility, expansibility and portability.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN92
【參考文獻】
相關期刊論文 前3條
1 武博強;楊晉生;劉敬浩;李中品;;基于USRP平臺的無線信道測量設計與實現(xiàn)[J];電子測量技術;2014年02期
2 楊晉生;胡自勝;陳為剛;;射線跟蹤中三維矢量數(shù)據(jù)庫建立方法[J];電信科學;2012年02期
3 周力,毛鈞杰,柴舜連;基于三維射線跟蹤的城市微小區(qū)電波傳播預測算法[J];電子學報;2002年03期
，本文編號：2478584
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