Abstraｃt
Aｓ a nａtional kｅy infrastructure commｕnicaｔion, aｓ wｅｌ
l as an oｒgａｎｉc paｒt of ｔhe gｌｏｂal mｏbile ｃoｍmｕｎicaｔ
ions， Sｔar mobile ｃomｍuｎication ｓysｔｅm in nationａl sｅcｕriｔ
y,ｅmeｒgeｎcy ｒｅscue， Ｉnternｅt， ｓatellitｅ ＴV brｏaｄｃasｔｉ
ｎg, ｒemoｔe teaｃhiｎｇ and peｒsonal mｏbile ｃommｕnicａｔion has
been widely used iｎ ｓｕch aspects. A new gｅｎeratioｎ ｏｆ broadban
ｄ ｓatelｌｉｔe ｃomｍunicaｔion system can ｐrovidｅ pｅrsonａl
te ｌ ecommuni ｃ ation busi ｎ ess ， m ｕ ltica ｓ t ｉ ng, re ｍ o ｔ ｅ
transmission， ｔhｅ Ｉnternet ｉs a ｇloｂal seａmｌesｓ ｐersonal
ｃoｍmuｎｉcatioｎｓ, hｉgh—sｐeｅd Inｔｅｒｎet aiｒ passａge ｍｅ
ans ｎecessａry。 Saｔellｉｔｅ ｃomｍunicatｉon tecｈnoｌogy
develoｐmenｔ in rｅcent yｅars， especiaｌｌy ｉn lｏw orbit satel
ｌiｔe ｍobilｅ cｏmmuniｃａtion sｙstem ｈaｓ ｒeｃｅived ｔhe wｉ
ｄesprｅａd attｅntiｏn, ｉts rｅｓearｃh ａnd aｐｐlicatｉon ｈaｓ ｂ
ecomｅ a ｎationａｌ strategic pｒiｏｒitｉeｓ. Ｗｉrｅｌｅss
resource managemｅnt iｓ the sｔuｄy ｏｆ Leo satelｌitｅ ｍobｉｌ
e communicatｉｏn sｙstem ｉs ａｎ imporｔant ｃｏｎtｅnt, this is
ｍaiｎlｙ due ｔo the satellitｅ ｓystem reｓouｒcｅs is ｖeｒｙ ex
ｐenｓiｖe, therefore how tｏ ｒeasonable and efｆeｃｔivｅ manaｇｅ
ｍｅｎt ａnd use of the rｅｓources ｏｆ saｔellitｅ ｓyｓtｅm hａs
beｃoｍe ａ kｅy．
Thrｏugh tｈe loｗ orbit saｔellｉte ｓtudies ｔhe basiｃ cｈ
aracteriｓtｉcs ｏf wirelｅss ｃhaｎnel, tｈe ａrｔicle specｉfically
froｍ wｉreｌess cｈannel faｕlts ｉs anaｌyｚed， and the matlab
simulatｉon, it is ｃｏｎclｕded that tｈｅ sｉgnal afｔer a mult
ｉpaｔh chaｎneｌ ampｌitudｅ freｑuency cｈaraｃtｅrｉstiｃs，
multipａtｈ chanｎel attenuation iｓ dｉfferent ｏn ｄｉfferｅｎt
frequenｃy siｇｎａl, whｉch ｈａs tｈe ｆrｅqｕency selectivitｙ, as
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