通(tong)(tong)信(xin)(xin)雙(shuang)方(fang)有一方(fang)或兩方(fang)處于(yu)運動中(zhong)(zhong)的通(tong)(tong)信(xin)(xin)。包括陸、海、空移動通(tong)(tong)信(xin)(xin)。采(cai)用的頻段遍(bian)及低頻、中(zhong)(zhong)頻、高頻、甚高頻和特高頻。移動通(tong)(tong)信(xin)(xin)系統由移動臺、基臺、移動交換(huan)局(ju)組(zu)成...