通信工程专业实习报告(共6篇).doc

????·???:í¨D?1¤3ìרòμêμ?°±¨??(126?a) ?°?? ê±1aè??ó￡?×a?2×??oμ?′ó?§éú??μ?μúò??ê?′???áê??￡ò??êμ?ê±??￡?×??o?§μ?á?oü?à￡?ò2μ?μ?á?oü?à￡?×÷?a?§?°í¨D?1¤3ìרòμμ??§éú￡?×÷?aò?oó?′??3é?aò???í¨D?è?μ??§éúà′?μ￡?á??aí¨D??ù′??aê?￡?????í¨D?רòμμ??§?°·?·¨￡??÷°×í¨D?DDòμ×??°??μ??????aê?￡?ê?1??μμ?×??o?°í?￡?1??μμ?×??oè?éú???μ?ü·?êμ??μ?è?éú′óê??￡ ′óò?ò??ê￡?í¨1y?ì?ì°??ü??í¨D??????·μ??§?°￡???ê±×??oí¨1y?ó??￡?±¨?ˉ￡?í???μ?á??a￡?oíá??üà?ê|￡?רòμè??±μ??2×ù￡?ò??°?ú?D1úáaí¨￡¨′ó?ì·?1???￡?￡?′ó?ìêˉóí?§?oμ??°??μ?2?1?êμ?°?￡????×??o????μ?í¨D??ù′??aê???DD??àí￡?×ü?á￡?ò?±??ú??oóμ?éú??￡??§?°￡?1¤×÷?D?üo?μ??μí3à?ó??aD?×ê?′?￡ ?ìê|?2×ù ò?￡?1aí¨D? 1876?ê?à1ú±′?ù·￠?÷μ??°oó￡?1aμ??°μ??D??3éá?Dí?à???§?ò?D??μ?D???ìa￡?ó°?ì1aμ??°μ?éúμ?òò??óD￡o a???óì??t óD?è?¨′?ê?1aμ??é?ê c?òμ?àí??μ?1a?′?￡ 1ae-×óí¨D?￡oê11a??3?±??í￡?±??-μ?á???D§ó|?à?￥μ???￡??í3éá?ò???±￡3?2?±?μ?1ae-×ó?￡ ?ò1ú1a??μ?·￠?1￡o1977?ê μúò??ù2¨3¤￡¨0.85?￠?×￡??×??Díêêó|1a???êêà￡?3¤?è?a17?×￡??￥???a300db/km.1978?ê??éùμ?5db/km.80-81?ê?D??3??¤1a?÷oípinì?2a?÷?￡84?ê?ú??oo￡?ìì?ò?¨á￠?à?￡1a??í¨D??￡1986?ê?ˉì?μ￥×Y?￡?¤1a?÷μ?éú?￡ ?t￡?é??-í??? êμê±êμ??×?ó???2¨μ?2μ?￡oa??2¨?÷è¨?μêyμ?êμê±???? ×?ó?·???D???2¨?÷μ?êμê±êμ???￡ êy×?D?o?′|àí?μí3￡o x￡¨t￡?-- 3é?ù---á??ˉ----êy×?D?o?′|àí?÷-----y￡¨t￡? é??-í???μ?×?ó???2¨?μí3￡oa: í????μí3b:rbfí????μí3 2??í????á11ò??ùr￡¨x￡?=exp￡¨-1x-c1/c*c￡? èy￡?ò??ˉí¨D? ì?μ?￡o1?′?óμ?D?μàì?D?￡oa?·???eo? b?à?·′?2￥ 2?à????μ??éè?￡oaí?μà?éè?￡¨í??μ?ê￡? báúμà?éè?￡¨áúD?μà￡? ·???ê?D??????D?àáúD?μà2??éê1ó?í?ò??μ?ê 3?à?ìà?D§ó| 4×éí?·?ê?áé??￡o′ó????￡?D????? 5?μ?ê×ê?′óD?T 6??éè±?òa?ó?? ò??ˉí????á11￡o?ù?? ,ò??ˉì¨￡?ò??ˉòμ???????DD? gsmí????μí3óé3??·??μí3×é3é￡oò??ˉì¨￡??ù??×ó?μí3￡¨bts￡?￡?í???×ó?μí3￡¨°üà¨hrl,vrl,ò??ˉòμ???????DD??￡?à1ü?μí3￡? ò??ˉì¨1¤×÷μ??μ??￡o·￠é??μ?ê￡¨é?DD￡??a890mhz--915mhz;?óêü?μ?ê￡¨??DD￡??a935mhz--960mhz [í¨D?1¤3ìרòμêμ?°±¨??(126?a)]?aò?￡oí¨D?1¤3ì±?òμêμ?°±¨?? êμ ?° ±¨ ?? ?§éúD??? ?§ o? ?§ ?o ר òμ ??μ??ìê| êμ?°μ￥?? o??YéDáéD??￠????óD?T1??? ?toò??t ?ê áù ?? ò??￠êμ?°?ù±??é?? êμ?°ê±??￡o2012?ê3???á2012?ê5???￠ êμ?°μ￥??￡oo??YéDáéD??￠????