CDMA網(wǎng)絡(luò)海域覆蓋專題優(yōu)化指導(dǎo)書.pdf (791.55 KB)【資料名稱】：海域優(yōu)化專題

【資料作者】：HW

【資料日期】：2011

【資料語言】：中文

【資料格式】：DOC

【資料目錄和簡介】：

海域覆蓋的技術(shù)特點(diǎn)..........................................................................................................1
1.1 概述........................................................................................................................................................1
1.2 海面無線傳播模型................................................................................................................................1
1.2.1 模型分段原則............................................................................................................................1
1.2.2 視距路徑....................................................................................................................................2
1.2.3 超視距路徑................................................................................................................................3
1.3 海面覆蓋的特點(diǎn)....................................................................................................................................3
2 海域覆蓋站點(diǎn)建設(shè)與規(guī)劃建議..........................................................................................5
2.1 站址選擇................................................................................................................................................5
2.2 主設(shè)備選擇............................................................................................................................................5
2.3 天線選擇................................................................................................................................................6
2.3.1 極化方式....................................................................................................................................6
2.3.2 天線輻射方向圖、水平波瓣寬度、垂直波瓣寬度和增益.....................................................6
2.3.3 天線下傾角................................................................................................................................6
2.3.4 天線旁瓣抑制與零點(diǎn)填充特性.................................................................................................6
2.3.5背向信號抑制............................................................................................................................6
2.4 饋線選擇................................................................................................................................................7
2.5 PN規(guī)劃建議...........................................................................................................................................8
3 海域覆蓋射頻優(yōu)化..............................................................................................................8
3.1 影響超遠(yuǎn)覆蓋的因素及優(yōu)化措施........................................................................................................8
3.1.1 站點(diǎn)規(guī)劃問題............................................................................................................................