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    您的位置:首頁 解決方案

    軍用頻譜計算與管理 解決方案

    2018-07-09


    基礎數據庫

    數據庫的數據是整個系統計算分析的基礎,數據庫結構的是否合理直接決定著整個系統計算速度及精度的關鍵。由于通信技術的日益發展,數據庫的結構設置需要將未來的升級因素考慮在內,以便數據庫能及時的更新。整個數據庫提供了與其他第三方系統數據庫的接口,系統在分析時通過接口來調用第三方系統數據庫的相關數據,并且生成數據庫視圖,而不存儲數據庫數據,這樣一方面保證了數據的安全性,另一方面也能夠減少系統的開銷。

    數據庫主要包含以下幾類類數據:監測數據、臺站數據、地圖數據以及管理數據等。


    電波傳播模型

    電波傳播模型是電磁環境分析的基礎, 系統提供適用于不同頻率的傳播模型,覆蓋了整個無線電頻譜范圍,主要包括以下一些傳播模型:

    ?   自由空間模型

    ?   ITU533模型

    ?   ITU370模型

    ?   ITU1546模型

    ?   COST231-Hata模型

    ?   ITU530模型

    ?   ITU618模型

    ?   Longley-Rice 模型

    ?   視距傳播模型

    ?   衍射模型:Epstein-Peterson模型和Deygout模型

    ?   航空模型

    EMC分析

    電磁分布計算: 電磁分布計算根據設備的技術參數,調用相關的傳播模型算法進行電磁分布計算,包括點、線、面及空間計算。根據定義的計算類型可給出場強、功率、接收功率、所需發射功率、功率通量密度、功率通量譜密度等計算結果。

    干擾分析:分為系統內干擾和系統間干擾,主要分析的干擾包括:同頻干擾、鄰頻干擾、互調干擾、雜散干擾、阻塞干擾、基帶抬升、諧波干擾、鏡頻干擾等。

    鏈路分析: 基于數字地圖和相應的傳播模型,可進行路徑剖面、鏈路空間場強分布以及菲涅爾區顯示,沿發射到接收鏈路連續顯示各點場強分布。在短波通信中,可根據不同的月份以及國際電聯提供的太陽黑子的活動情況數據計算最佳工作頻率,最高可用頻率,以及最低可用工作頻率等關鍵參數。


    監測數據分析

    監測數據分析一方面提供了與實際監測設備連接的接口,可以遠程控制監測設備獲取監測數據,另一方面對監測數據進行統計分析,包括監測數據的時間、頻率和強度的三維顯示;頻譜的占用度分析;瀑布圖統計等


    頻率指配

    在新設無線電臺站或用頻設備預指配頻率過程中,進行信道質量預測。包括兩種方式:一類是基于數據庫電臺數據,在選定頻段內根據已規劃分配的頻率(從頻譜資源數據庫取得),臺站自動計算可指配頻率。反之,可分析擬設臺預選頻率及站址對已存在頻率、臺站的影響,為各種臺站的頻率指配提供技術支持。另一類是基于實際環境中采集的監測數據,通過監測數據的融合分析,得出可用的頻率資源進行頻率指配。亦可將兩種方式結合完成頻率指配,提高準確性。


    態勢展示

    通過GIS系統將分析的結果進行展示,支持2D和3D展示

    8-2.jpg

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