06第六章-频率划和抗干扰技术.doc
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μúáù?? ?μ?ê????oí?1?éè???ê? 6-1 6.1 ?μ?ê???? 6-1 6.1.1 ?μ?ê??·??°???é±èòa?ó 6-1 6.1.2 ?μ?ê1???μ??-?ò 6-3 6.1.3 ?ù±??μ?ê?′ó? 6-4 6.1.4 ???ü?μ?ê?′ó? 6-5 6.2 ?1?éè???ê? 6-13 6.2.1 ì??μ??ê? 6-13 6.2.2 1|?ê???? 6-17 6.2.3 2?á?D?·￠é? 6-18 μúáù?? ?μ?ê????oí?1?éè???ê?
6.1 ?μ?ê????
·????μí3·￠?1μ???ìì￡?èYá?êüμ?ò??¨μ??μ?ê′??í?T???￡?μ?ê±?D???DD?′ó?2??ü?ú×?ò??¨??óò?úμ?èYá?Dè?ó?￡μ??μ?ê?′ó?óè??ê????üμ??μ?ê?′ó?·?ê?±?è??áê1?ò????áùè?o??μμíí?áú?μ?éè?μ??êìa￡o?úí?μè??óò?ú￡??μ?ê?′ó??àà????í?é￡?í?áú?μ?éè???D?￡?μ?èYá?ò2D?￡??μ?ê?′ó??????ü￡?èYá?μ?μ?ò??¨μ?ìáéy￡?μ?????′?à′á?í?áú?μ?éè?μ?é?éy?￡è?o?è?μ?èYá?oí?°ò??êá?μ???oaê??μ?ê????±?D??a??μ??êìa￡??????°?μ￡?ò???á?o?μ??μ?ê?????éò??ú??3?á?o?μ??°ò??êá?μ??ù′?é?êμ??í???èYá?μ?ìáéy?￡
6.1.1 ?μ?ê??·??°???é±èòa?ó
·????μí3?ù?Y?μ?êò?°?·??aGSM900MoíDCS1800M?μí3￡????μ?????a200kHz?￡??é??￠??DD?μ?ê??·?è???￡o
í???ààDí ?μ?ê′??í￡¨é?DD/??DD￡?￡¨MHz￡? GSM900 890??915/935??960 DCS1800 1710??1785/1805??1880
1. GSM900
12124???μμ?￡?Dòo?￡¨ARFCN￡??a1??124￡??ú????á?óD200kHzμ?±￡?¤′??￡°′??1ú?ò1??¨￡?ò??ˉ??ó?890??909/935??954MHz￡?áaí¨??ó?909??915/954??960MHz?￡?μ?êó?Dòo?(n)μ?1??μè???￡o
?ù??ê?￡of1(n)￡?890.2￡?(n-1)?á0.2 (MHz)
?ù??·￠￡o f2(n)￡?f1(n)￡?45 (MHz)
2. DCS1800
12374???μμ?￡?Dòo?￡¨ARFCN￡??a512??885?￡?μ?êó?Dòo?￡¨n￡?μ?1??μè???￡o
?ù??ê?￡o f1(n)￡?1710.2￡?(n-512)?á0.2 (MHz)
?ù??·￠￡o f2(n)￡?f1(n)￡?95 (MHz)
ò??ˉ??ó?1710MHz??1720MHz￡???ó|μ??μ?êDòo??a512??561￡?áaí¨??ó?1745 MHz??1755MHz￡???ó|Dòo??a687 ??736?￡
3. ???é±èòa?ó
?ú·????μí3?D￡?óéóú?μ?ê×ê?′ê?óD?Tμ?￡??μ?êμ????′ê1ó?ê?ìá???μ?êà?ó??êμ?óDD§ê????￡?μ?êμ????′ê1ó?±?è??ì3é?à?￥??μ??éè?￡?3????aí??μ?éè??￡á??μ?ê?à???àà????ü￡??μ?êà?ó??ê????￡?μ?ê??éè?ò2??′ó?￡í?6-1?èê??éè?μ?·?2??é???￡?aá?·???·?±?￡?D???ò??yáù±?D?′úì??￡í??DD?D?a?′ó??àà?￡?[fn]?a?′ó?μ??μ?ê?￡?éè?1|?êμ?′óD?è???óúóDD§·￠é?1|?ê?￠?′ó??àà?oí?·???￥o??￡?-1yí?μ?￡?μ?3??′ó??μ?ê×?êyK￡o
K=i2+ij+j2
ê??Di,j?a??êy?￡
í?6-1 ?éè?ê?òaí?
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