ҵ˾ͨרҵ
ͨţ
1ж
1ڵϵͳͨУǰҪOPGWͨţͨΪԵġԶĵȶĲͨŷʽȻڡ̣
2ڿھϴһ÷ְʽṹҪڿߡ̣
3ͨŵƵص㻮ΪͨŲ΢ͨš
4ͨУһụ̃́
5ͨẒ̻́ҵУο·ָվ1ŵƵŵԪ--վ2ŵƵշԪ
6ͨУͨתạ́
7ͨأŵǺẉ̂

2ѡ⣨ѡͶѡ⣩
1ͨǲFDMAַʱҪעһЩ͵ص㣺BC
AҪϵͳʾ
BҪʵıƵ
CҪٻӰ
2վ͵ϵ߿ھ֡ڹͨϵͳISУ涨Dվ߿ھΪ D 
A30~32ף   B11~13ף   C16~18ף   D4.57׺3.05
3ͨУĶַУABCDE
AFDMA
BTDMA
CCDMA
DSDMA
Eϼֶַ
4CDMAʽͨŵŵǣAC
Aྶǿ
BƵʸ
Cܡ
Dʸ
5һΪ΢ڣ DΪкҹ涨΢СڣE Ϊȫ
A10mw/cm2    B5mw/cm2     C3mw/cm2    D1mw/cm2  E38w/cm2
6*һͨͨһ㿼ǣABCD
A··
Bǻ
C·
Dվڲ
7ͨŵУõĸٷʽΪABC
A˹       B       CԶ     

3⣺
1վҪУҪ߸ŷϵͳɡ
2ͨǵϵߵͨվ֮ͨмվеͨš
3ͨУĶַУFDMATDMACDMASDMAԼֶַϡ
4ͨеתǺĲͨΪ͸תʹתࡣ
5û֣ͨſɷΪ:ããרáõ֡
6ͨУҪɿռ䴫˥ģӦǴ˥ĵȡ
7վһΪ̶ʽɰʽƶʽ
8ͨУʵˣITUϸߵʹ򻮷֣ҹڵڣ III 

4⣺
1ң⼰ָϵͳͨŵҪɲ֣Ҫʲô
	𣺶ǽиٲ׼ȷϵָλãкҪڶǽйλñ֡
2ͨϵͳļɣ
	𣺿ռϵͳͨŵվң⼰ָϵͳͼعϵͳĴ󲿷ɡ
3վļɣ
	Ҫ߷ϵͳϵͳջϵͳͨſƷϵͳŵն豸ϵͳ͵Դϵͳɡ
4ͨǵɣ
ҪɿƷϵͳͨŷϵͳңָϵͳԴϵͳ¿طϵͳɡ

5
1һվλڶ119.03γ26.1վλڶ110.5վ롣

ùʽdsqrtRh2R22RR+hcoscos
УRΪ뾶ȡ6378kmhΪĴֱ룬ȡ35786km
       ΪվγȣվľȲ
36622.57km
2һվվΪ38000kmزĹвΪ0.05ףвΪ0.075ףдĺдġ

ùʽL=10log4d/ˣ2 
ģ199.6dBģ196.1 dB
3һվֱΪ12m,߿ھЧΪ0.6ջǰ˵߳Ϊ10mÿ0.15dBջϵNFΪ1.2069-վΪ38000KmתЧȫ书[EIRP]ֵΪ13.0dBW, ƵΪ6GHz豸(20C=290K), վƷ[G/T]ֵ 
ùʽ
[G/T]=G-Ts
   G=(D/)2*
   Ts TaLf-1* ToTr* Lf
G=55.329dB, Te=179.636K,   [G/T]=32.785 dB/ K
4Լнջ[C/T]ֵ
 ùʽ[C/T]=[EIRP]-L+[G/T]
   -125.323 dBm/

 1 ҳ  5 ҳ

