ÎÊÌâÒÑ¿ªÆô
(ÆÕͨÎÊÌâ)
GSMµÄÐźŵĴø¿íÊǶàÉÙ£¿
ARFCNƵµã¶ÔÓ¦µÄÐŵÀ´ø¿íÊÇ200KHzÒѾ֪µÀÁË£¬ÏëÎÊһϸ÷λ´óÉñ£¬Ä³¸öƵµãÖд«ÊäµÄÐźŵĴø¿íÊǶàÉÙ£¿ÊÇÐŵÀÖеÄÐźţ¬²»ÊÇÐŵÀ¹þ¡£ÐźŴø¿í¿Ï¶¨ÊDZÈ200KHzҪСµÄ¡£Çë²»Òª»Ø´ðÎÒʲô200KHz£¬25MHz£¬45MHz£¬270.833KHz ÕâЩ´ð°¸À²¡£Ð»À²¡£
ÌáÎÊÕß: tttxxx ÌáÎÊʱ¼ä: 2014-07-02
• ÏÖÔÚ»¹ÓбØҪѧGSMºÍCDMAÂð 2020-09-29
• SAÓïÒôÒµÎñEPSFB»ØÂä4Gºó²»½øÐÐvolte£¬GSMCALL³¬Ê±¡¢Ê§°Ü 2020-09-02
• °²×¿ÊÖ»ú»ñÈ¡GSM³¡Ç¿ºÍÐźÅÇ¿¶ÈµÃµ½ber=99£¬Ôõô¼ÆËãÐźÅÇ¿¶È°¡£¿ 2019-12-26
• GSMºÍFDDºÏ·ÌìÏߣ¬¹¦ÂÊÏàͬ£¬ÎªÊ²Ã´GSM¸²¸ÇЧ¹û±ÈFDDºÃºÜ¶à£¿ 2019-12-23
• ŵ»ùÑÇFlexiGSMBTS»ùÕ¾ÔÀí¼°×é³ÉÓ¦Óó¡¾° 2019-11-26
• ÎÒ¹úGSMƵ¶ÎÊǶàÉÙ 2019-08-22
• ŵÎ÷ÔÚ¸ßÌúÉÏÓõÄGSM-R·Ö²¼Ê½»ùÕ¾ÊÇʲôÐͺŰ¡ 2019-08-21
• ¹òÇóÖÐÐËGSM¸ß¼¶×îÐÂÌâ¿â 2019-07-29
• SAÓïÒôÒµÎñEPSFB»ØÂä4Gºó²»½øÐÐvolte£¬GSMCALL³¬Ê±¡¢Ê§°Ü 2020-09-02
• °²×¿ÊÖ»ú»ñÈ¡GSM³¡Ç¿ºÍÐźÅÇ¿¶ÈµÃµ½ber=99£¬Ôõô¼ÆËãÐźÅÇ¿¶È°¡£¿ 2019-12-26
• GSMºÍFDDºÏ·ÌìÏߣ¬¹¦ÂÊÏàͬ£¬ÎªÊ²Ã´GSM¸²¸ÇЧ¹û±ÈFDDºÃºÜ¶à£¿ 2019-12-23
• ŵ»ùÑÇFlexiGSMBTS»ùÕ¾ÔÀí¼°×é³ÉÓ¦Óó¡¾° 2019-11-26
• ÎÒ¹úGSMƵ¶ÎÊǶàÉÙ 2019-08-22
• ŵÎ÷ÔÚ¸ßÌúÉÏÓõÄGSM-R·Ö²¼Ê½»ùÕ¾ÊÇʲôÐͺŰ¡ 2019-08-21
• ¹òÇóÖÐÐËGSM¸ß¼¶×îÐÂÌâ¿â 2019-07-29
ÎÊÌâ´ð°¸
( 5 )
1¡¢ÎÒÃ÷È·µÄ¸æËßÂ¥Ö÷£¬200khz¶¼ÊÇ´«Ðźŵģ¬Ã»Óв»´«µÄ£¡
2¡¢ÉèÖÃ200KHZÕâÊǺʹ«ÊäËÙÂÊÓйصģ¬´ø¿íÔ½¸ß£¬´«ÊäµÄÊý¾ÝËÙÂʾÍÔ½¿ì£»
3¡¢GSMµÄµ÷Öƺó´ø¿í±È200kHZ»¹Òª¿íһЩ£¬ËùÒÔ»áÓÐһЩ×Ó¸ÉÈÅ£¬µ«²»Ó°ÏìͨÐÅ¡£
4¡¢ÖÁÓÚ200KÔõôÀ´µÄ£¬ÎÒÖ»ÄܸæËßÂ¥Ö÷£¬ÊÇ´Ó±£»¤¼ä¸ôºÍƵÂÊ×ÊÔ´µÄÓÅ»¯ÀûÓÃÁ½·½Ãæ×ۺϿ¼Âǵģ¬Õâ¾ÍÊÇÐÒé¹æ¶¨µÄ¡£
Ï£ÍûÄܰﵽ¥Ö÷
2¡¢ÉèÖÃ200KHZÕâÊǺʹ«ÊäËÙÂÊÓйصģ¬´ø¿íÔ½¸ß£¬´«ÊäµÄÊý¾ÝËÙÂʾÍÔ½¿ì£»
3¡¢GSMµÄµ÷Öƺó´ø¿í±È200kHZ»¹Òª¿íһЩ£¬ËùÒÔ»áÓÐһЩ×Ó¸ÉÈÅ£¬µ«²»Ó°ÏìͨÐÅ¡£
4¡¢ÖÁÓÚ200KÔõôÀ´µÄ£¬ÎÒÖ»ÄܸæËßÂ¥Ö÷£¬ÊÇ´Ó±£»¤¼ä¸ôºÍƵÂÊ×ÊÔ´µÄÓÅ»¯ÀûÓÃÁ½·½Ãæ×ۺϿ¼Âǵģ¬Õâ¾ÍÊÇÐÒé¹æ¶¨µÄ¡£
Ï£ÍûÄܰﵽ¥Ö÷
»Ø´ðÕߣº
OscarDon
»Ø´ðʱ¼ä£º2014-07-02 22:54
41 38
ÎÒÖªµÀ200K¶¼ÓÃÀ´´©Ðĺţ¬µ«ÊÇ´«ÊäµÄÐźÅ×ܲ»»áÊÇ200K°É£¬Ó¦¸ÃÊǸö±È200KϸµÄÐźŲŶ԰ɡ£
tttxxx 2014-07-03 09:55
http://bbs.c114.net/asktech/question.php?qid=33
ÇëÎÊÉÏÃæÌû×ÓÀï˵µÄ81KHzÊDz»ÊÇÎÒÎʵÄÎÊÌâµÄ´ð°¸ÄØ£¿ÎÒ²»Ì«¶®¡£
ÇëÎÊÉÏÃæÌû×ÓÀï˵µÄ81KHzÊDz»ÊÇÎÒÎʵÄÎÊÌâµÄ´ð°¸ÄØ£¿ÎÒ²»Ì«¶®¡£
tttxxx 2014-07-03 10:01
һ¥Õý½â,ÔÚGSMϵͳÖÐ200kÊÇÐÒéµÄ¹æ¶¨!
»Ø´ðÕߣº
litom2004
»Ø´ðʱ¼ä£º2014-07-03 06:26
44 47
http://bbs.c114.net/asktech/question.php?qid=33
ÇëÎÊÉÏÃæÌû×ÓÀï˵µÄ81KHzÊDz»ÊÇÎÒÎʵÄÎÊÌâµÄ´ð°¸ÄØ£¿ÎÒ²»Ì«¶®¡£
ÇëÎÊÉÏÃæÌû×ÓÀï˵µÄ81KHzÊDz»ÊÇÎÒÎʵÄÎÊÌâµÄ´ð°¸ÄØ£¿ÎÒ²»Ì«¶®¡£
tttxxx 2014-07-03 10:01
Äã˵µÄ200KHzÊÇÐŵÀ¿í¶È£¨¼´»ù´øµÄ¿í¶È£©£¬ÄãËùÖ¸µÄÐźÅÊÇ¿ÉÓÃÐÅÏ¢¡¾Ôز¨¡¿
ÄãÓ¦¸ÃÈ¥Ñо¿ÏÂÐźŵĵ÷ÖÆ¡¢±àÂë¡¢½»Ö¯¡¢TDMAµÄÖ¡½á¹¹£¡
GSM900ʹÓÃÁ½¸ö25MHzƵ¶Î¡¾¹¤×÷´ø¿í¡¿£¬890~915MHzÉÏÐУ¬935~960MHzÏÂÐУ¬ÉÏÐкÍÏÂÐж¼±»»®·ÖΪ200KHz¿íµÄÐŵÀ£¬¸ÃÐŵÀ³ÆΪARFCN£¬ÉÏÏÂÐмä¸ôΪ45MHz¡£
GSM900ʹÓÃÁ½¸ö25MHzƵ¶Î¡¾¹¤×÷´ø¿í¡¿£¬890~915MHzÉÏÐУ¬935~960MHzÏÂÐУ¬ÉÏÐкÍÏÂÐж¼±»»®·ÖΪ200KHz¿íµÄÐŵÀ£¬¸ÃÐŵÀ³ÆΪARFCN£¬ÉÏÏÂÐмä¸ôΪ45MHz¡£
»Ø´ðÕߣº
wr2009
»Ø´ðʱ¼ä£º2014-07-03 09:30
48 50
ÔÚ200KHzÐŵÀÀï´«ÊäµÄÐÅºÅµÄ ¿í¶ÈÊǶàÉÙ£¿
tttxxx 2014-07-03 09:58
http://bbs.c114.net/asktech/question.php?qid=33
ÇëÎÊÉÏÃæÌû×ÓÀï˵µÄ81KHzÊDz»ÊÇÎÒÎʵÄÎÊÌâµÄ´ð°¸ÄØ£¿ÎÒ²»Ì«¶®¡£
ÇëÎÊÉÏÃæÌû×ÓÀï˵µÄ81KHzÊDz»ÊÇÎÒÎʵÄÎÊÌâµÄ´ð°¸ÄØ£¿ÎÒ²»Ì«¶®¡£
tttxxx 2014-07-03 10:00
GSMÔز¨´ø¿íÊÇ200Khz£¬ÄãËù˵µÄGSMµÄÐźŵĴø¿íÓ¦¸ÃÖ¸µÄÊÇGSM¿Õ¿ÚÐźŵĴø¿í£¬ÄǾÍÊÇ270.833Khz£¬Èç¹û˵ָµÄÊǵ÷ÖÆËÙÂÊÄǾÍÊÇ33.8khz
»Ø´ðÕߣº
zhangshiqin
»Ø´ðʱ¼ä£º2014-07-03 21:32
34 38
ÎÒÕâÀï˵µÄ´ø¿íÊÇƵ´ø¿í¶È£¬²»ÊÇ˵´«ÊäËÙÂÊ¡£GSMÔز¨´ø¿í200KHz£¬ÄÇÀïÃæµÄÐźÅÓ¦¸Ã²»³¬¹ý200K²Å¶Ô°É¡£
tttxxx 2014-07-04 15:42
Ó¦¸ÃÊÇ3dB´ø¿í81.25kHz
»Ø´ðÕߣº
wx_10302248
»Ø´ðʱ¼ä£º2024-01-16 11:08
0 0
ÈȵãÎÊÌâ
¸ü¶à¾«²Ê
ÁªÏµÎÒÃÇ - ÎÊͨÐÅר¼Ò | Powered by MSCBSC Òƶ¯Í¨ÐÅÍø © 2006 - |