發(fa)布(bu)時間：
2017
-
05
-
18
性能(neng)(neng)特點(dian)：（1）工(gong)作穩定(ding)，覆(fu)蓋(gai)(gai)效果(guo)(guo)好(hao):光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)放站(zhan)(zhan)通過(guo)(guo)(guo)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)傳(chuan)輸信(xin)(xin)(xin)號(hao)(hao)，不(bu)受地理環境、天(tian)(tian)(tian)氣變化或(huo)基站(zhan)(zhan)覆(fu)蓋(gai)(gai)范圍(wei)調整的(de)(de)(de)(de)(de)(de)影響，因此(ci)工(gong)作穩定(ding)，覆(fu)蓋(gai)(gai)效果(guo)(guo)好(hao)。（2）設(she)計(ji)和(he)施(shi)工(gong)更為(wei)(wei)靈活:光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)放站(zhan)(zhan)在(zai)設(she)計(ji)時無需(xu)(xu)(xu)考(kao)慮安裝地點(dian)能(neng)(neng)否接(jie)收(shou)到(dao)(dao)信(xin)(xin)(xin)號(hao)(hao)；不(bu)需(xu)(xu)(xu)考(kao)慮收(shou)發(fa)隔(ge)離問題，選址方(fang)便；覆(fu)蓋(gai)(gai)天(tian)(tian)(tian)線可(ke)(ke)根據需(xu)(xu)(xu)要(yao)采用全向或(huo)定(ding)向天(tian)(tian)(tian)線。另外射(she)頻(pin)信(xin)(xin)(xin)號(hao)(hao)能(neng)(neng)夠(gou)在(zai)很(hen)小的(de)(de)(de)(de)(de)(de)傳(chuan)送損(sun)失的(de)(de)(de)(de)(de)(de)情(qing)況下被傳(chuan)送到(dao)(dao)遠(yuan)(yuan)達20公里的(de)(de)(de)(de)(de)(de)遠(yuan)(yuan)處(chu)，光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)很(hen)細，容(rong)易(yi)敷設(she)。因此(ci)，設(she)計(ji)和(he)施(shi)工(gong)的(de)(de)(de)(de)(de)(de)靈活性大(da)(da)(da)。（３）避(bi)免(mian)同頻(pin)干(gan)擾，可(ke)(ke)全向覆(fu)蓋(gai)(gai)，干(gan)擾少(shao):光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)放站(zhan)(zhan)是(shi)為(wei)(wei)了(le)擴大(da)(da)(da)或(huo)延續基站(zhan)(zhan)的(de)(de)(de)(de)(de)(de)覆(fu)蓋(gai)(gai)范圍(wei)，把下行射(she)頻(pin)信(xin)(xin)(xin)號(hao)(hao)變成光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)后，從(cong)基站(zhan)(zhan)到(dao)(dao)遠(yuan)(yuan)程區域，可(ke)(ke)使干(gan)擾及插入損(sun)失減小到(dao)(dao)最(zui)小。（４）可(ke)(ke)提(ti)高增益而不(bu)會自激，有利(li)于加大(da)(da)(da)下行信(xin)(xin)(xin)號(hao)(hao)發(fa)射(she)功率(lv)；光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)放站(zhan)(zhan)是(shi)由(you)近端(duan)機和(he)遠(yuan)(yuan)構(gou)成的(de)(de)(de)(de)(de)(de)。近端(duan)機通過(guo)(guo)(guo)耦(ou)(ou)合器(qi)耦(ou)(ou)合基站(zhan)(zhan)下行信(xin)(xin)(xin)號(hao)(hao)，并入近端(duan)機射(she)頻(pin)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)模塊(kuai)將基站(zhan)(zhan)的(de)(de)(de)(de)(de)(de)下行射(she)頻(pin)信(xin)(xin)(xin)號(hao)(hao)通過(guo)(guo)(guo)電(dian)(dian)光(guang)(guang)(guang)轉換(huan)(huan)(huan)部(bu)件轉換(huan)(huan)(huan)成光(guang)(guang)(guang)信(xin)(xin)(xin)號(hao)(hao)并經(jing)(jing)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)傳(chuan)輸至(zhi)遠(yuan)(yuan)端(duan)機，在(zai)遠(yuan)(yuan)端(duan)機的(de)(de)(de)(de)(de)(de)射(she)頻(pin)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)模塊(kuai)將接(jie)收(shou)到(dao)(dao)的(de)(de)(de)(de)(de)(de)下行的(de)(de)(de)(de)(de)(de)光(guang)(guang)(guang)信(xin)(xin)(xin)號(hao)(hao)轉化成相應的(de)(de)(de)(de)(de)(de)射(she)頻(pin)信(xin)(xin)(xin)號(hao)(hao)，該(gai)射(she)頻(pin)信(xin)(xin)(xin)號(hao)(hao)經(jing)(jing)功率(lv)放大(da)(da)(da)器(qi)放大(da)(da)(da)變為(wei)(wei)所(suo)(suo)需(xu)(xu)(xu)要(yao)的(de)(de)(de)(de)(de)(de)功率(lv)電(dian)(dian)平信(xin)(xin)(xin)號(hao)(hao)，并通過(guo)(guo)(guo)雙工(gong)器(qi)由(you)重發(fa)天(tian)(tian)(tian)線發(fa)射(she)出去，進(jin)行區域覆(fu)蓋(gai)(gai)；反之由(you)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)放站(zhan)(zhan)的(de)(de)(de)(de)(de)(de)重發(fa)天(tian)(tian)(tian)線接(jie)收(shou)到(dao)(dao)的(de)(de)(de)(de)(de)(de)上行信(xin)(xin)(xin)號(hao)(hao)經(jing)(jing)過(guo)(guo)(guo)低噪聲放大(da)(da)(da)器(qi)放大(da)(da)(da)到(dao)(dao)一定(ding)的(de)(de)(de)(de)(de)(de)電(dian)(dian)平射(she)頻(pin)信(xin)(xin)(xin)號(hao)(hao)，通過(guo)(guo)(guo)遠(yuan)(yuan)端(duan)機的(de)(de)(de)(de)(de)(de)射(she)頻(pin)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)模塊(kuai)進(jin)行電(dian)(dian)光(guang)(guang)(guang)轉換(huan)(huan)(huan)換(huan)(huan)(huan)成信(xin)(xin)(xin)號(hao)(hao)并經(jing)(jing)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)傳(chuan)輸至(zhi)近端(duan)機，在(zai)近端(duan)機的(de)(de)(de)(de)(de)(de)射(she)頻(pin)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)模塊(kuai)將接(jie)收(shou)到(dao)(dao)的(de)(de)(de)(de)(de)(de)光(guang)(guang)(guang)信(xin)(xin)(xin)號(hao)(hao)轉化成相應的(de)(de)(de)(de)(de)(de)射(she)頻(pin)信(xin)(xin)(xin)號(hao)(hao)，并經(jing)(jing)功率(lv)放大(da)(da)(da)器(qi)變為(wei)(wei)所(suo)(suo)需(xu)(xu)(xu)要(yao)的(de)(de)(de)(de)(de)(de)功率(lv)電(dian)(dian)平信(xin)(xin)(xin)號(hao)(hao)，并入耦(ou)(ou)合器(qi)耦(ou)(ou)合發(fa)送到(dao)(dao)基站(zhan)(zhan)，從(cong)而構(gou)成由(you)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)作為(wei)(wei)傳(chuan)輸介質的(de)(de)(de)(de)(de)(de)光(guang)(guang)(guang)纖(xian)(xian)(xian)(xian)直(zhi)放站(zhan)(zhan)系統。