什么是衛星電話？
簡單的(de)(de)(de)說衛(wei)(wei)星電(dian)(dian)話(hua)就是(shi)依靠衛(wei)(wei)星的(de)(de)(de)無線(xian)網(wang)絡來實現(xian)電(dian)(dian)話(hua)功能(neng)的(de)(de)(de)設備(bei)，和(he)咱們普通(tong)(tong)手(shou)(shou)(shou)(shou)機的(de)(de)(de)原理差不(bu)(bu)多，只不(bu)(bu)過是(shi)普通(tong)(tong)手(shou)(shou)(shou)(shou)機像GSM CDMA制式的(de)(de)(de)手(shou)(shou)(shou)(shou)機都(dou)采(cai)用(yong)的(de)(de)(de)是(shi)地面(mian)(mian)基站的(de)(de)(de)信(xin)號網(wang)絡來實現(xian)語(yu)音(yin)、短信(xin)和(he)數(shu)(shu)據功能(neng)，這(zhe)也(ye)是(shi)衛(wei)(wei)星電(dian)(dian)話(hua)產生的(de)(de)(de)原因，衛(wei)(wei)星網(wang)絡不(bu)(bu)受(shou)地震(zhen)、風災、洪(hong)水的(de)(de)(de)影響，如果(guo)地面(mian)(mian)手(shou)(shou)(shou)(shou)機網(wang)絡癱瘓的(de)(de)(de)時(shi)候(hou)這(zhe)個時(shi)候(hou)才是(shi)衛(wei)(wei)星電(dian)(dian)話(hua)大顯身手(shou)(shou)(shou)(shou)的(de)(de)(de)時(shi)候(hou)，所以衛(wei)(wei)星電(dian)(dian)話(hua)的(de)(de)(de)價格比(bi)普通(tong)(tong)手(shou)(shou)(shou)(shou)機要貴，同(tong)時(shi)資(zi)費(fei)也(ye)比(bi)普通(tong)(tong)手(shou)(shou)(shou)(shou)機的(de)(de)(de)資(zi)費(fei)貴，不(bu)(bu)過，今(jin)天(tian)衛(wei)(wei)星電(dian)(dian)話(hua)這(zhe)個概念也(ye)不(bu)(bu)再那么陌生，已經(jing)在民用(yong)方面(mian)(mian)慢慢普及(ji)，比(bi)如現(xian)在旅游大家都(dou)常常攜帶GPS和(he)衛(wei)(wei)星電(dian)(dian)話(hua)，GPS是(shi)接受(shou)衛(wei)(wei)星信(xin)號實現(xian)定位功能(neng)，不(bu)(bu)能(neng)提供語(yu)音(yin)和(he)數(shu)(shu)據功能(neng)，所以二(er)者(zhe)可以互補。下面(mian)(mian)咱們在幾個方面(mian)(mian)認識一下衛(wei)(wei)星電(dian)(dian)話(hua)。
簡單的說(shuo)衛(wei)星電(dian)話(hua)(hua)就是(shi)依靠衛(wei)星的無線網絡(luo)(luo)來(lai)實現電(dian)話(hua)(hua)功(gong)(gong)能(neng)(neng)(neng)的設(she)備，和(he)咱(zan)們普(pu)(pu)通手(shou)(shou)機(ji)的原(yuan)理差不(bu)(bu)多，只不(bu)(bu)過(guo)是(shi)普(pu)(pu)通手(shou)(shou)機(ji)像GSM CDMA制式的手(shou)(shou)機(ji)都(dou)采用(yong)的是(shi)地面基站的信號網絡(luo)(luo)來(lai)實現語音、短(duan)信和(he)數據功(gong)(gong)能(neng)(neng)(neng)，這也是(shi)衛(wei)星電(dian)話(hua)(hua)產生的原(yuan)因，衛(wei)星網絡(luo)(luo)不(bu)(bu)受地震、風災、洪水的影響(xiang)，如(ru)果地面手(shou)(shou)機(ji)網絡(luo)(luo)癱瘓的時(shi)(shi)候這個(ge)時(shi)(shi)候才是(shi)衛(wei)星電(dian)話(hua)(hua)大顯身手(shou)(shou)的時(shi)(shi)候，所以(yi)(yi)衛(wei)星電(dian)話(hua)(hua)的價(jia)格比(bi)普(pu)(pu)通手(shou)(shou)機(ji)要貴，同時(shi)(shi)資費也比(bi)普(pu)(pu)通手(shou)(shou)機(ji)的資費貴，不(bu)(bu)過(guo)，今天衛(wei)星電(dian)話(hua)(hua)這個(ge)概念(nian)也不(bu)(bu)再那么陌(mo)生，已經在(zai)(zai)民(min)用(yong)方面慢慢普(pu)(pu)及，比(bi)如(ru)現在(zai)(zai)旅游大家都(dou)常常攜(xie)帶GPS和(he)衛(wei)星電(dian)話(hua)(hua)，GPS是(shi)接受衛(wei)星信號實現定位功(gong)(gong)能(neng)(neng)(neng)，不(bu)(bu)能(neng)(neng)(neng)提(ti)供語音和(he)數據功(gong)(gong)能(neng)(neng)(neng)，所以(yi)(yi)二者可以(yi)(yi)互(hu)補。下面咱(zan)們在(zai)(zai)幾個(ge)方面認識一下衛(wei)星電(dian)話(hua)(hua)。
從硬件方面(mian)來認識一下(xia)幾種衛星電話：?
在(zai)硬(ying)件(jian)方(fang)面隨著(zhu)時代的(de)(de)發展體(ti)積越來越小，以前(qian)的(de)(de)設(she)備(bei)都(dou)是(shi)(shi)比較(jiao)大(da)類(lei)似筆記(ji)本大(da)小，尤其(qi)(qi)是(shi)(shi)海事(shi)衛(wei)星(xing)的(de)(de)體(ti)積大(da)，因為(wei)海事(shi)衛(wei)星(xing)是(shi)(shi)高軌(gui)衛(wei)星(xing)，要求(qiu)天線的(de)(de)功率比較(jiao)大(da)，指向性比較(jiao)強(qiang)，近年來由于科(ke)技(ji)的(de)(de)發展其(qi)(qi)硬(ying)件(jian)體(ti)積越來越小。銥星(xing)是(shi)(shi)低(di)軌(gui)衛(wei)星(xing)覆(fu)蓋全球(qiu)(qiu)，所以銥星(xing)的(de)(de)手持(chi)衛(wei)星(xing)電(dian)話一般都(dou)很好(hao)用；歐星(xing)衛(wei)星(xing)電(dian)話是(shi)(shi)很年輕(qing)的(de)(de)一代衛(wei)星(xing)網絡，它的(de)(de)的(de)(de)設(she)備(bei)尤其(qi)(qi)是(shi)(shi)手持(chi)的(de)(de)設(she)備(bei)比較(jiao)時尚，一般都(dou)為(wei)彩屏手機，通話質量也不(bu)錯(cuo)，但是(shi)(shi)覆(fu)蓋范圍(wei)是(shi)(shi)其(qi)(qi)短板(ban)，不(bu)能覆(fu)蓋全球(qiu)(qiu)。
