【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(jì)相似性,例如室內(nèi)場(chǎng)景。這種情況下使用統(tǒng)計(jì)模型或經(jīng)驗(yàn)?zāi)Ｐ偷葌鹘y(tǒng)方法對(duì)場(chǎng)強(qiáng)等電波傳播特性進(jìn)行預(yù)測(cè)會(huì)產(chǎn)生比較大的誤差,所以有必要對(duì)特定室內(nèi)場(chǎng)景中電波傳播特性進(jìn)行測(cè)量與仿真,為信道建模和網(wǎng)絡(luò)規(guī)劃提供依據(jù)。本文設(shè)計(jì)并實(shí)現(xiàn)了一種基于軟件無線電的無線信號(hào)強(qiáng)度實(shí)時(shí)測(cè)量平臺(tái),并針對(duì)某室內(nèi)具體場(chǎng)景進(jìn)行了場(chǎng)強(qiáng)測(cè)量。論文進(jìn)一步利用射線跟蹤算法對(duì)同一場(chǎng)景下的場(chǎng)強(qiáng)分布進(jìn)行了仿真。最后,對(duì)實(shí)測(cè)和仿真數(shù)據(jù)進(jìn)行了比對(duì)分析,印證了該測(cè)量系統(tǒng)應(yīng)用在實(shí)際環(huán)境之中的可行性。本測(cè)量系統(tǒng)以功率譜計(jì)算為核心,在信號(hào)接收端利用頻域功率譜濾除帶外噪聲,利用滑動(dòng)平均窗口濾除快衰落,提高了測(cè)量精度;采用自動(dòng)增益控制,增加了測(cè)量的距離;系統(tǒng)選用軟件無線電進(jìn)行相關(guān)的信號(hào)處理,具有成本低,靈活性、擴(kuò)展性和可移植性高的特點(diǎn)。
[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(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN92

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 武博強(qiáng);楊晉生;劉敬浩;李中品;;基于USRP平臺(tái)的無線信道測(cè)量設(shè)計(jì)與實(shí)現(xiàn)[J];電子測(cè)量技術(shù);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(xué);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(yù)測(cè)算法[J];電子學(xué)報(bào);2002年03期

，

本文編號(hào)：2478584